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Home > CA Providers > Orthopedic Surgeons

Dr. Ernest H. Sponzilli, MD

Accepting New Patients

(12 Ratings)

Specializes in: Orthopedics/Orthopedic Surgery and Physiatry (Physical Medicine & Rehabilitation)

Albany Medical College

75 Rowland Suite 250
Novato, CA 94945

(415) 878-2910

Dr. Ernest H. Sponzilli, MD is an orthopedist in LARKSPUR, CA specializing in orthopedics/orthopedic surgery and physiatry (physical medicine & rehabilitation). He graduated from Albany Medical College. Dr. Ernest H. Sponzilli, MD is affiliated with Hill Physicians.

Office Locations

2 BON AIR ROAD SUITE 120
LARKSPUR, CA 94939

open_in_new

18 Bon Air Road
Larkspur, CA 94939

open_in_new

75 Rowland Suite 250
Novato, CA 94945

(415) 878-2910

open_in_new

Noteworthy Medicare Patient Procedures Performed by Dr. Ernest H. Sponzilli, MD in 2024

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 5%

By Volume:

nerve block

nerve conduction studies

pain management

selective nerve root block

subarachnoid block with local anesthetic

transforaminal epidural steroid injection

In 2024, Dr. Ernest H. Sponzilli, MD performed more nerve block, nerve conduction studies (NCS), pain management, selective nerve root block (SNRB), subarachnoid block with local anesthetic (numbing medicine), and transforaminal epidural steroid injection procedures for Medicare patients than 95% of providers in related specialties within California.

Top 10%

By Volume:

injections

spinal injection

In 2024, Dr. Ernest H. Sponzilli, MD performed more injections, and spinal injection procedures for Medicare patients than 90% of providers in related specialties within California.

Top 25%

By Volume:

facet rhizotomy injection

rhizotomy

By Affordability:

sacroiliac joint injection

spinal joint injection

In 2012, among providers in related specialties within California, Dr. Ernest H. Sponzilli, MD performed more facet rhizotomy injection, and rhizotomy (nerve ablation) procedures for Medicare patients than 75% of them and he also had a list price for sacroiliac (SI) joint injection, and spinal joint injection that was lower than the list prices billed to Medicare by 75% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2012 were spinal procedures, diagnostic procedures, injections and pain management.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	78
diagnostic procedures	838
doctor visit	1372
hip imaging	11
injections	561
minimally invasive procedures	82
MRI (magnetic resonance imaging)	138
musculoskeletal imaging	33
nerve block	483
nerve procedures	69
pain management	552
pelvic imaging	90
removal of internal scar tissue	13
spinal procedures	903
X-rays	392

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2013 were spinal procedures, pain management, injections and nerve block.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	68
diagnostic procedures	138
doctor visit	1218
injections	636
minimally invasive procedures	114
MRI (magnetic resonance imaging)	127
nerve block	568
nerve procedures	92
pain management	660
pelvic imaging	36
removal of internal scar tissue	22
spinal procedures	902
X-rays	221

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	339
Female	568

**Ethnicity**
Non-Hispanic White	836
Black	18
Hispanic	23
Asian	16
Other	0
Native American	0

**Age**
From 65 to 74	364
From 75 to 84	287
85 and over	183
Less than 65	73

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2013

Hypertension	59
High Cholesterol	56
Stroke	6
Ischemic Heart Disease	32
Depression	19
Chronic Kidney Disease	15
Asthma	8
Osteoperosis	10
Atrial Fibrilation	12
Heart Failure	10
Chronic Obstructive Pulmonary Disease	7
Diabetes	20
Dementia	9
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2014 were spinal procedures, pain management, injections and nerve block.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	68
diagnostic procedures	173
doctor visit	1355
injections	708
minimally invasive procedures	104
MRI (magnetic resonance imaging)	150
nerve block	612
nerve procedures	104
pain management	744
pelvic imaging	49
spinal procedures	1028
X-rays	302

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	390
Female	597

**Ethnicity**
Non-Hispanic White	907
Black	0
Hispanic	23
Asian	25
Other	18
Native American	0

**Age**
From 65 to 74	403
From 75 to 84	351
85 and over	168
Less than 65	65

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2014

Hypertension	55
High Cholesterol	54
Stroke	6
Ischemic Heart Disease	32
Depression	19
Chronic Kidney Disease	14
Asthma	8
Osteoperosis	12
Atrial Fibrilation	13
Heart Failure	10
Chronic Obstructive Pulmonary Disease	7
Diabetes	22
Dementia	8
Cancer	10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2015 were spinal procedures, pain management, injections and nerve block.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	70
diagnostic procedures	160
doctor visit	1524
injections	725
minimally invasive procedures	113
MRI (magnetic resonance imaging)	102
musculoskeletal imaging	21
nerve block	622
nerve procedures	113
pain management	768
pelvic imaging	58
spinal procedures	1083
X-rays	421

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	814
Female	1238

**Ethnicity**
Non-Hispanic White	1870
Black	0
Hispanic	58
Asian	44
Other	48
Native American	0

**Age**
From 65 to 74	866
From 75 to 84	716
85 and over	344
Less than 65	126

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2015

Hypertension	56
High Cholesterol	53
Stroke	7
Ischemic Heart Disease	32
Depression	21
Chronic Kidney Disease	15
Asthma	10
Osteoperosis	11
Atrial Fibrilation	14
Heart Failure	11
Chronic Obstructive Pulmonary Disease	8
Diabetes	20
Dementia	8
Cancer	10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2016 were spinal procedures, pain management, injections and nerve block.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	76
diagnostic procedures	128
doctor visit	1521
injections	834
minimally invasive procedures	106
MRI (magnetic resonance imaging)	95
nerve block	758
nerve procedures	106
pain management	864
pelvic imaging	35
spinal procedures	1105
X-rays	287

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	433
Female	625

**Ethnicity**
Non-Hispanic White	973
Black	0
Hispanic	0
Asian	26
Other	30
Native American	0

**Age**
From 65 to 74	462
From 75 to 84	344
85 and over	187
Less than 65	65

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2016

Hypertension	56
High Cholesterol	51
Stroke	5
Ischemic Heart Disease	29
Depression	21
Chronic Kidney Disease	15
Asthma	13
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	10
Chronic Obstructive Pulmonary Disease	7
Diabetes	19
Dementia	9
Cancer	11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2017 were spinal procedures, injections, pain management and nerve block.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	92
diagnostic procedures	141
doctor visit	1377
injections	588
minimally invasive procedures	72
MRI (magnetic resonance imaging)	86
musculoskeletal imaging	27
nerve block	460
nerve procedures	72
pain management	568
pelvic imaging	46
spinal procedures	822
X-rays	331

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	370
Female	569

**Ethnicity**
Non-Hispanic White	853
Black	0
Hispanic	19
Asian	22
Other	33
Native American	0

**Age**
From 65 to 74	434
From 75 to 84	315
85 and over	143
Less than 65	47

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2017

Hypertension	55
High Cholesterol	48
Stroke	6
Ischemic Heart Disease	30
Depression	23
Chronic Kidney Disease	16
Asthma	8
Osteoperosis	12
Atrial Fibrilation	13
Heart Failure	10
Chronic Obstructive Pulmonary Disease	9
Diabetes	18
Dementia	9
Cancer	9

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2018 were spinal procedures, injections, pain management and nerve block.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	47
diagnostic procedures	128
doctor visit	1182
injections	415
minimally invasive procedures	46
MRI (magnetic resonance imaging)	83
musculoskeletal imaging	25
nerve block	357
nerve procedures	46
pain management	414
pelvic imaging	53
spinal procedures	661
X-rays	288

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	372
Female	475

**Ethnicity**
Non-Hispanic White	769
Black	0
Hispanic	17
Asian	19
Other	30
Native American	0

**Age**
From 65 to 74	359
From 75 to 84	308
85 and over	131
Less than 65	49

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2018

Hypertension	57
High Cholesterol	53
Stroke	6
Ischemic Heart Disease	30
Depression	26
Chronic Kidney Disease	19
Asthma	7
Osteoperosis	11
Atrial Fibrilation	13
Heart Failure	9
Chronic Obstructive Pulmonary Disease	7
Diabetes	20
Dementia	11
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2019 were spinal procedures, pain management, injections and X-rays.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	56
diagnostic procedures	188
doctor visit	1543
injections	498
minimally invasive procedures	72
MRI (magnetic resonance imaging)	118
musculoskeletal imaging	37
nerve block	391
nerve procedures	72
pain management	514
pelvic imaging	66
spinal procedures	854
X-rays	417

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	350
Female	536

**Ethnicity**
Non-Hispanic White	790
Black	0
Hispanic	23
Asian	22
Other	37
Native American	0

**Age**
From 65 to 74	386
From 75 to 84	319
85 and over	132
Less than 65	49

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2019

Hypertension	55
High Cholesterol	54
Stroke	4
Ischemic Heart Disease	28
Depression	26
Chronic Kidney Disease	18
Asthma	7
Osteoperosis	13
Atrial Fibrilation	12
Heart Failure	10
Chronic Obstructive Pulmonary Disease	6
Diabetes	17
Dementia	8
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2020 were spinal procedures, pain management, injections and X-rays.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	47
diagnostic procedures	163
doctor visit	838
hip imaging	14
injections	366
minimally invasive procedures	72
MRI (magnetic resonance imaging)	111
musculoskeletal imaging	57
nerve block	252
nerve procedures	72
pain management	391
pelvic imaging	55
spinal procedures	589
X-rays	305

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	275
Female	366

**Ethnicity**
Non-Hispanic White	563
Black	18
Hispanic	20
Asian	0
Other	27
Native American	0

**Age**
From 65 to 74	281
From 75 to 84	233
85 and over	84
Less than 65	43

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2020

Hypertension	51
High Cholesterol	52
Stroke	5
Ischemic Heart Disease	29
Depression	22
Chronic Kidney Disease	18
Asthma	8
Osteoperosis	14
Atrial Fibrilation	11
Heart Failure	12
Chronic Obstructive Pulmonary Disease	7
Diabetes	18
Dementia	7
Cancer	11

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2021 were spinal procedures, injections, pain management and X-rays.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	55
diagnostic procedures	186
doctor visit	879
injections	421
minimally invasive procedures	31
MRI (magnetic resonance imaging)	108
musculoskeletal imaging	29
nerve block	323
nerve procedures	31
pain management	397
pelvic imaging	74
spinal procedures	723
X-rays	385

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	327
Female	453

**Ethnicity**
Non-Hispanic White	685
Black	0
Hispanic	21
Asian	21
Other	38
Native American	0

**Age**
From 65 to 74	319
From 75 to 84	304
85 and over	114
Less than 65	43

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2021

Hypertension	59
High Cholesterol	61
Stroke	6
Ischemic Heart Disease	28
Depression	25
Chronic Kidney Disease	19
Asthma	8
Osteoperosis	17
Atrial Fibrilation	11
Heart Failure	10
Chronic Obstructive Pulmonary Disease	7
Diabetes	18
Dementia	7
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2022 were spinal procedures, pain management, injections and nerve block.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	15
diagnostic procedures	224
doctor visit	877
injections	417
minimally invasive procedures	39
MRI (magnetic resonance imaging)	81
musculoskeletal imaging	14
nerve block	383
nerve procedures	39
pain management	441
pelvic imaging	74
spinal procedures	723
X-rays	344

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	350
Female	445

**Ethnicity**
Non-Hispanic White	711
Black	0
Hispanic	28
Asian	0
Other	29
Native American	0

**Age**
From 65 to 74	290
From 75 to 84	355
85 and over	112
Less than 65	38

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2022

Hypertension	65
High Cholesterol	74
Stroke	9
Ischemic Heart Disease	25
Depression	24
Chronic Kidney Disease	15
Asthma	10
Osteoperosis	22
Atrial Fibrilation	17
Heart Failure	10
Chronic Obstructive Pulmonary Disease	10
Diabetes	16
Dementia	5
Cancer	14

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2023 were spinal procedures, pain management, injections and nerve block.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	42
diagnostic procedures	174
doctor visit	758
injections	352
minimally invasive procedures	46
MRI (magnetic resonance imaging)	54
nerve block	282
nerve procedures	46
pain management	356
pelvic imaging	39
spinal procedures	506
X-rays	211

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	309
Female	391

**Ethnicity**
Non-Hispanic White	610
Black	0
Hispanic	26
Asian	0
Other	32
Native American	0

**Age**
From 65 to 74	258
From 75 to 84	312
85 and over	104
Less than 65	26

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2023

Hypertension	66
High Cholesterol	75
Stroke	10
Ischemic Heart Disease	26
Depression	22
Chronic Kidney Disease	18
Asthma	11
Osteoperosis	22
Atrial Fibrilation	16
Heart Failure	10
Chronic Obstructive Pulmonary Disease	12
Diabetes	16
Dementia	4
Cancer	14

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA during 2024 were pain management, injections, spinal procedures and nerve block.

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

aspiration	27
diagnostic procedures	140
doctor visit	831
injections	394
minimally invasive procedures	55
nerve block	321
nerve procedures	55
pain management	422
spinal procedures	354

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Male	317
Female	404

**Ethnicity**
Non-Hispanic White	632
Black	11
Hispanic	22
Asian	15
Other	41
Native American	0

**Age**
From 65 to 74	275
From 75 to 84	316
85 and over	110
Less than 65	20

Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD in 2024

Hypertension	65
High Cholesterol	75
Stroke	10
Ischemic Heart Disease	28
Depression	22
Chronic Kidney Disease	20
Asthma	11
Osteoperosis	26
Atrial Fibrilation	17
Heart Failure	12
Chronic Obstructive Pulmonary Disease	11
Diabetes	17
Dementia	4
Cancer	16

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Ernest H. Sponzilli, MD for Medicare patients.

The highest averages for the top procedures that Dr. Ernest H. Sponzilli, MD treated as an orthopedist in LARKSPUR, CA were spinal procedures, pain management, injections and nerve block.

aspiration	57
diagnostic procedures	213
doctor visit	1175
hip imaging	12
injections	531
minimally invasive procedures	73
MRI (magnetic resonance imaging)	104
musculoskeletal imaging	30
nerve block	447
nerve procedures	70
pain management	545
pelvic imaging	56
removal of internal scar tissue	17
spinal procedures	788
X-rays	325

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Ernest H. Sponzilli, MD.

**Gender**
Female	512
Male	357

**Ethnicity**
Black / African American	3
Asian / Pacific Islander	16
Non-Hispanic White	784
Native American / Alaskan Native	0
Hispanic	21
Other	27

**Age**
75 to 84	320
85 and over	139
Less than 65	49
65 to 74	361

Average of Total of Conditions of Medicare patients treated by Dr. Ernest H. Sponzilli, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Ernest H. Sponzilli, MD treated were high cholesterol, hypertension, ischemic heart disease and depression.

Hypertension	53
High Cholesterol	54
Stroke	6
Ischemic Heart Disease	26
Depression	20
Chronic Kidney Disease	15
Asthma	8
Osteoporosis	13
Heart Failure	9
Chronic Obstructive Pulmonary Disease	7
Diabetes	17
Atrial Fibrillation	12
Dementia	6
Cancer	10

Education & Training

Dr. Ernest H. Sponzilli, MD graduated from Albany Medical College. He completed residency at VA Greater Los Angeles Healthcare System. He is certified by the American Board of Physical Medicine and Rehabilitation: Pain Medicine and has a state license in California.

Medical School: Albany Medical College

Residency: VA Greater Los Angeles Healthcare System

Board Certification: American Board of Physical Medicine and Rehabilitation: Pain Medicine

Licensed In: California

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Ernest H. Sponzilli, MD appears to accept the following insurance providers: UnitedHealthcare, Anthem, Blue Shield of California and Western Health Advantage (WHA).

Insurance Accepted by Provider includes:

According to our sources, Dr. Ernest H. Sponzilli, MD accepts the following insurance providers:

UnitedHealthcare

Anthem

Blue Shield of California

Western Health Advantage (WHA)

Ratings & Reviews

Dr. Ernest H. Sponzilli, MD has a high overall rating with an average of 4.33 out of 5 stars based on 12 ratings. We collect ratings and reviews of Dr. Ernest H. Sponzilli, MD from all over the web to help you find the right in LARKSPUR, CA.

4.33

Overall Rating

(12 Ratings)

Leave a Review

Reviews From Around The Web

Overall Rating: 5.0 2026-06-28

Patient verified via Press Ganey

My Doctor was very good and explained everything really well. Asked if I had questions and gave me wonderful advice

Overall Rating: 5.0 2025-07-11

Patient verified via Press Ganey

Dr. Sponzilli is the best, he is always right and knows what to do or where to send me

Overall Rating: 5.0 2025-05-16

Patient verified via Press Ganey

Dr. Sponzilli is great! I wish there were more doctors like him.

Overall Rating: 5.0 2025-08-30

Patient verified via Press Ganey

Very confident and supportive. Understanding and caring.

Overall Rating: 5.0 2026-08-05

Patient verified via Press Ganey

Dr Sponzelli is extraordinary!

General Payments

These charts describe general payments received by Dr. Ernest H. Sponzilli, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
BIOTRONIK NRO, Inc.	$210 Prospera $210
Zimmer Biomet Holdings, Inc.	$71 Mobi-C $71
Stryker Corporation	$44 INTERVENTIONAL SPINE $44
DePuy Synthes Sales Inc.	$42 SYNTHECEL $42
Esaote North America, Inc.	$37 $37
Other	$191 Recon-Upper Extremity Metal $35	IonicRF $23	VIMOVO $21	Duexis $15	XTAMPZA $15	Other $83

**Types of Payments**
Food and Beverage	$596

Biography

Dr. Ernest Sponzilli is a medical specialist in physiatry (physical medicine & rehabilitation), spine surgery, and orthopedics/orthopedic surgery. Patient ratings for Dr. Sponzilli average 4.5 stars (out of 5). He is affiliated with Marin General Hospital and Hill Physicians. Dr. Sponzilli seems to honor Blue Shield, Anthem, and UnitedHealthcare, as well as other insurance carriers. Dr. Sponzilli welcomes new patients at his office inLarkspur, CA as reported by Hill Physicians. After attending Albany Medical College for medical school, he completed his residency training at VA Greater Los Angeles Healthcare System and a hospital affiliated with the University of California, Los Angeles (UCLA). He has received the following distinctions: San Francisco Magazine Top Doc; Top Doctor Marin Magazine; and [415] Top Doctor.