Catherine Hamilton, MD

Offices

1 location · G2 Anesthesia PC · 104 clinicians in this group

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Plan participation

Not verified

We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Dr. Hamilton’s office at (408) 559-2011 to ask if they take your plan before you enroll.

California Medical Board record

Licence G74001 · Current

Licensed to practise in California · since 1992 · expires 2028-05-31 · University of Southern California Keck School of Medicine.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

Original Medicare doctor bills

$44,549

Medicare paid this office $44,549 for 364 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

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Largest Original Medicare bills

Anesthesia for other procedure on large bowel using an endoscope	182	$20,782	$114
Anesthesia for procedure on small and large bowel using an endoscope	74	$10,524	$140
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope	60	$6,701	$112
Anesthesia for exam of colon using an endoscope	36	$3,849	$107

Who their Medicare patients are

364 Original Medicare patients in 2024. Average age 73 · Women 60% · Health risk score 0.74. At or below the middle of the specialty; the typical anesthesiology clinician is at 1.54.

Conditions among them: High blood pressure 59% · Coronary heart disease 18% · Diabetes 16% · Cancer 15% · Depression 11% · Atrial fibrillation 10% · Chronic kidney disease 9% · Heart failure 5% · COPD 5%.

The office billed $654,500, Medicare allowed $54,136 and paid $44,549; for 375 services of 15 kinds.

Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.

Year by year

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Original Medicare by year

2024	364	375	73	0.74	$654,500	$44,549
2023	305	314	73	0.67	$447,200	$37,782
2022	269	304	74	0.74	$502,422	$36,903
2021	285	303	74	0.88	$547,678	$39,943
2020	162	181	72	0.91	$340,472	$24,479
2019	242	294	73	1.03	$529,806	$37,926
2018	240	328	72	1.10	$572,024	$39,142
2017	256	334	72	1.17	$546,878	$39,513
2016	159	211	73	1.03	$342,496	$24,695
2015	130	193	74	1.58	$222,533	$26,782
2014	162	262	72	2.20	$241,100	$39,183
2013	212	292	74	1.74	$268,100	$44,282

Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.

See the services billed each year

2023: 4 services

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Original Medicare services billed in 2023

Anesthesia for other procedure on large bowel using an endoscope	142	$16,739	$116
Anesthesia for procedure on small and large bowel using an endoscope	53	$7,491	$141
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope	44	$5,069	$115
Anesthesia for exam of colon using an endoscope	37	$3,970	$107

2022: 9 services

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Original Medicare services billed in 2022

Anesthesia for other procedure on large bowel using an endoscope	66	$8,914	$135
Anesthesia for lens surgery	40	$4,781	$120
Anesthesia for exam of colon using an endoscope	35	$4,138	$118
Anesthesia for procedure on small and large bowel using an endoscope	27	$3,942	$146
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope	19	$2,192	$115
Anesthesia for other procedure on top of arm bone and shoulder joint	12	$2,139	$178
Anesthesia for other procedure on eye	12	$1,701	$142
Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus)	15	$822	$55
Ultrasonic guidance for needle placement	17	$460	$27

2021: 5 services

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Original Medicare services billed in 2021

Anesthesia for other procedure on large bowel using an endoscope	72	$9,981	$139
Anesthesia for procedure on small and large bowel using an endoscope	48	$7,266	$151
Anesthesia for exam of colon using an endoscope	42	$4,856	$116
Anesthesia for lens surgery	39	$4,743	$116
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope	26	$3,173	$122

2020: 6 services

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Original Medicare services billed in 2020

Anesthesia for other procedure on large bowel using an endoscope	49	$6,497	$133
Anesthesia for procedure on small and large bowel using an endoscope	21	$3,274	$156
Anesthesia for exam of colon using an endoscope	16	$2,045	$120
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope	15	$1,924	$128
Anesthesia for lens surgery	13	$1,649	$118
Anesthesia for x-ray procedure (accessed through the skin) on spine and spinal cord	11	$1,471	$134

2019: 11 services

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Original Medicare services billed in 2019

Anesthesia for x-ray procedure (accessed through the skin) on spine and spinal cord	42	$5,539	$132
Anesthesia for other procedure on large bowel using an endoscope	29	$4,149	$143
Anesthesia for lens surgery	30	$3,595	$120
Anesthesia for other procedure on top of arm bone and shoulder joint	17	$3,423	$201
Anesthesia for procedure on small and large bowel using an endoscope	15	$2,452	$153
Anesthesia for nerve block and injection procedure, prone position	20	$2,237	$112
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope	14	$1,861	$124
Anesthesia for exam of colon using an endoscope	15	$1,840	$123
Anesthesia for other procedure or exam of knee joint using an endoscope	11	$1,457	$132
Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus)	17	$975	$57
Ultrasonic guidance for needle placement	22	$667	$29

2018: 7 services

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Original Medicare services billed in 2018

Anesthesia for x-ray procedure (accessed through the skin) on spine and spinal cord	81	$11,646	$121
Anesthesia for lens surgery	41	$5,394	$123
Anesthesia for other procedure on top of arm bone and shoulder joint	19	$4,123	$217
Anesthesia for other procedure or exam of knee joint using an endoscope	20	$2,711	$136
Anesthesia for nerve block and injection procedure, prone position	17	$1,949	$115
Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus)	23	$1,248	$54
Ultrasonic guidance for needle placement	32	$900	$28

2017: 10 services

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Original Medicare services billed in 2017

Anesthesia for x-ray procedure (accessed through the skin) on spine and spinal cord	46	$6,691	$129
Anesthesia for procedure on lower intestine using an endoscope	43	$6,417	$149
Anesthesia for nerve block and injection procedure, prone position	36	$4,631	$113
Anesthesia for lens surgery	28	$3,317	$114
Anesthesia for other procedure on top of arm bone and shoulder joint	16	$3,204	$200
Anesthesia for other procedure or exam of knee joint using an endoscope	17	$2,093	$123
Anesthesia for closed procedure on pubic bone or pelvic joint	16	$1,621	$95
Anesthesia for diagnostic x-ray procedure (accessed through the skin) on spine and spinal cord	13	$1,542	$119
Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus)	18	$1,011	$56
Ultrasonic guidance for needle placement	29	$841	$29

2016: 7 services

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Original Medicare services billed in 2016

Anesthesia for lens surgery	55	$6,790	$119
Anesthesia for other procedure on top of arm bone and shoulder joint	15	$3,093	$206
Anesthesia for other procedure or exam of knee joint using an endoscope	22	$2,647	$120
Anesthesia for other procedure on lower leg, ankle, and foot bones	15	$2,246	$150
Anesthesia for nerve block and injection procedure, prone position	17	$2,123	$118
Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus)	15	$849	$57
Ultrasonic guidance for needle placement	22	$660	$30

2015: 5 services

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Original Medicare services billed in 2015

Anesthesia for lens surgery	33	$4,027	$115
Anesthesia for other procedure or exam of knee joint using an endoscope	18	$2,222	$123
Anesthesia for other procedure on top of arm bone and shoulder joint	12	$2,199	$183
Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus)	16	$895	$56
Ultrasonic guidance for needle placement	27	$797	$30

2014: 4 services

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Original Medicare services billed in 2014

Anesthesia for lens surgery	17	$2,106	$124
Ultrasonic guidance for needle placement	37	$1,109	$30
Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve)	13	$690	$53
Insertion of artery tube for blood sampling or infusion through skin	13	$578	$44

2013: 4 services

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Original Medicare services billed in 2013

Anesthesia for lens surgery	44	$5,460	$119
Daily hospital management of continuous spinal drug administration	16	$1,061	$56
Insertion of artery tube for blood sampling or infusion through skin	16	$691	$43
Ultrasonic guidance for needle placement	21	$593	$28

Money from drug and device companies

$100 in 2025

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Industry payments by year

2025	3	5	None	$100
2024	4	6	None	$148
2023	5	5	None	$105
2022	4	4	None	$89
2021	1	1	None	$14

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

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Payments by company

Phathom Pharmaceuticals	Voquezna	$51	3 payments Meals for Voquezna · 2025-12-11 · $21 Meals for Voquezna · 2025-12-10 · $2 Meals for Voquezna · 2025-01-30 · $28
Lilly USA	Omvoh	$34	1 payment Meals for Omvoh · 2025-03-01 · $34
QOL Medical	Sucraid	$15	1 payment Meals for Sucraid · 2025-10-22 · $15

See all 5 published payments

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Every published payment

Phathom Pharmaceuticals	Meals · 2025-12-11	Voquezna	$21
Phathom Pharmaceuticals	Meals · 2025-12-10	Voquezna	$2
QOL Medical	Meals · 2025-10-22	Sucraid	$15
Lilly USA	Meals · 2025-03-01	Omvoh	$34
Phathom Pharmaceuticals	Meals · 2025-01-30	Voquezna	$28

See earlier years (2024, 2023, 2022, 2021)

2024: $148

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Payments by company in 2024

QOL Medical	Sucraid	$60	3 payments Meals for Sucraid · 2024-10-24 · $20 Meals for Sucraid · 2024-09-05 · $20 Meals for Sucraid · 2024-06-25 · $20
Janssen Biotech	Stelara	$40	1 payment Meals for Stelara · 2024-04-19 · $40
Lilly USA	Omvoh	$32	1 payment Meals for Omvoh · 2024-07-25 · $32
Aimmune Therapeutics	Zenpep	$17	1 payment Meals for Zenpep · 2024-08-22 · $17

2023: $105

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Payments by company in 2023

Nestle Healthcare Nutrition	Zenpep	$29	1 payment Meals for Zenpep · 2023-07-09 · $29
Celltrion USA	Yuflyma	$20	1 payment Education for Yuflyma · 2023-10-11 · $20
Takeda Pharmaceuticals U.S.A.	Entyvio	$19	1 payment Meals for Entyvio · 2023-12-14 · $19
QOL Medical	Sucraid	$19	1 payment Meals for Sucraid · 2023-01-19 · $19
Janssen Biotech	Stelara	$19	1 payment Meals for Stelara · 2023-03-30 · $19

2022: $89

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Payments by company in 2022

Abbvie	Creon	$27	1 payment Meals for Creon · 2022-02-09 · $27
Takeda Pharmaceuticals U.S.A.	Entyvio	$24	1 payment Meals for Entyvio · 2022-02-01 · $24
Merck Sharp & Dohme	Dificid	$19	1 payment Meals for Dificid · 2022-04-26 · $19
Nestle HealthCare Nutrition	Zenpep	$19	1 payment Meals for Zenpep · 2022-04-01 · $19

2021: $14

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Payments by company in 2021

Takeda Pharmaceuticals U.S.A.	Motegrity	$14	1 payment Meals for Motegrity · 2021-08-17 · $14

Professional record

NPI: 1396761300
Licence: CA G74001California G74001: Current · expires 2028-05-31
Trained: University of Southern California Keck School of Medicine, 1990
Group: G2 Anesthesia PC
Gender: Female

More record details

Sole proprietor: No
Medicaid ID: CA 00G740010
Taxonomy: Federal specialty code 207L00000X (207L00000X)
Mailing address: Po Box 7793, San Francisco, CA, 94120
NPI first listed: 2006-07-14
NPI last updated: 2007-07-08

This is when the NPI record was last certified, not a medical board exam.