Tohru Sato, MD | UniHealth

Offices

1 location · Sutter Bay Medical Foundation · 3,783 clinicians in this group

Looking this up.

Plans that list them

12 plans · 3 carriers

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Sato’s office at (650) 321-4121 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

12 of 12 plans

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Plans whose provider directory lists this clinician

Alignment Health BreathEasy (HMO C-SNP)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Clarity (HMO C-SNP)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Harmony (HMO)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Heart & Diabetes (HMO C-SNP)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Heart & Diabetes CalPlus (HMO C-SNP)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Heart & Diabetes Care (HMO C-SNP)	Alignment Health Plan	Listed	Sep 28, 2026
Alignment Health Heart & Diabetes Choice (HMO C-SNP)	Alignment Health Plan	Listed	Sep 28, 2026
Alignment Health Honor+ Plan (HMO)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health My Choice CalCare (HMO)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Sutter Advantage +More (HMO)	Alignment Health Plan	Listed	Oct 3, 2026
SCAN Strive (HMO C-SNP)	SCAN Health Plan	Listed	Oct 3, 2026
DualConnect (HMO D-SNP)	Santa Clara Family Health Plan	Listed	Sep 1, 2026

Original Medicare doctor bills

$84,232

Medicare paid this office $84,232 for 338 people.

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

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Largest Original Medicare bills

Removal of polyps or growths of large bowel using an endoscope with mechanical snare	134	$31,346	$234
Long return visit (40+ min)	85	$18,163	$161
Biopsy of large bowel using a flexible endoscope	104	$10,628	$102
Return visit (30+ min)	37	$4,240	$109
Colorectal cancer screening; colonoscopy on individual at high risk	16	$3,262	$204

See all 11 services

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Every Original Medicare service billed

Removal of polyps or growths of large bowel using an endoscope with mechanical snare	134	$31,346	$234
Long return visit (40+ min)	85	$18,163	$161
Biopsy of large bowel using a flexible endoscope	104	$10,628	$102
Return visit (30+ min)	37	$4,240	$109
Colorectal cancer screening; colonoscopy on individual at high risk	16	$3,262	$204
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	48	$3,180	$66
New patient visit (60+ min)	15	$3,116	$208
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	12	$2,451	$204
New patient visit (45+ min)	13	$1,894	$146
Diagnostic exam of large bowel using a flexible endoscope	11	$1,774	$161
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	207	$927	$4

Procedures Medicare counted

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Procedure volume Medicare published

Colonoscopy	163	More than 90% of doctors who do this
Upper gastrointestinal (GI) endoscopy for acid reflux	71	More than 70% of doctors who do this

Who their Medicare patients are

338 Original Medicare patients in 2024. Average age 73 · Women 55% · Also on Medicaid 5% · Health risk score 0.76. At or below the middle of the specialty; the typical gastroenterology clinician is at 1.42.

Conditions among them: High blood pressure 54% · Coronary heart disease 16% · Diabetes 15% · Depression 13% · Chronic kidney disease 11% · Cancer 11% · Atrial fibrillation 10% · COPD 5% · Heart failure 4%.

The office billed $815,888, Medicare allowed $104,971 and paid $84,232; for 763 services of 25 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	338	763	73	0.76	$815,888	$84,232
2023	313	714	73	0.72	$713,375	$77,596
2022	293	703	74	0.79	$597,633	$70,323
2021	271	646	74	0.74	$573,594	$60,880
2020	252	566	74	0.82	$483,512	$54,103
2019	261	587	73	0.77	$521,895	$57,648
2018	269	659	74	0.88	$522,636	$59,779
2017	133	342	74	1.03	$240,528	$30,053

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: 9 services

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Original Medicare services billed in 2023

Removal of polyps or growths of large bowel using an endoscope with mechanical snare	104	$24,592	$236
Biopsy of large bowel using a flexible endoscope	114	$13,011	$114
Long return visit (40+ min)	61	$12,602	$164
Return visit (30+ min)	53	$7,112	$117
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	51	$3,897	$74
New patient visit (60+ min)	20	$3,771	$189
Colorectal cancer screening; colonoscopy on individual at high risk	18	$3,736	$208
New patient visit (45+ min)	22	$2,594	$118
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	185	$868	$5

2022: 10 services

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Original Medicare services billed in 2022

Removal of polyps or growths of large bowel using an endoscope with mechanical snare	78	$17,769	$228
Long return visit (40+ min)	69	$17,470	$168
Biopsy of large bowel using a flexible endoscope	100	$10,681	$107
New patient visit (60+ min)	30	$5,614	$187
Return visit (30+ min)	33	$3,159	$85
New patient visit (45+ min)	20	$2,897	$145
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	44	$2,865	$62
Office for the evaluation and management of established patient that may not require presence of healthcare professional	38	$902	$23
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	165	$783	$5
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or	16	$639	$29

2021: 9 services

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Original Medicare services billed in 2021

Removal of polyps or growths of large bowel using an endoscope with mechanical snare	71	$16,163	$228
Biopsy of large bowel using a flexible endoscope	111	$12,799	$115
Return visit (30+ min)	58	$9,064	$112
New patient visit (45+ min)	28	$4,392	$157
Long return visit (40+ min)	24	$3,595	$150
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	41	$3,244	$75
Telephone medical discussion with physician, 21-30 minutes	11	$1,747	$97
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	167	$833	$5
Office for the evaluation and management of established patient that may not require presence of healthcare professional	34	$710	$20

2020: 10 services

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Original Medicare services billed in 2020

Biopsy of large bowel using a flexible endoscope	99	$14,013	$142
Removal of polyps or growths of large bowel using an endoscope with mechanical snare	36	$8,570	$238
Return visit (30+ min)	62	$7,226	$94
Colorectal cancer screening; colonoscopy on individual at high risk	22	$4,651	$211
New patient visit (45+ min)	32	$4,503	$141
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	38	$3,468	$89
Long return visit (40+ min)	19	$2,576	$136
Telephone medical discussion with physician, 21-30 minutes	14	$1,770	$98
Telephone medical discussion with physician, 11-20 minutes	12	$1,093	$73
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	158	$831	$5

2019: 8 services

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Original Medicare services billed in 2019

Biopsy of large bowel using a flexible endoscope	103	$13,574	$132
Removal of polyps or growths of large bowel using an endoscope with mechanical snare	41	$8,844	$216
New patient visit (45+ min)	59	$8,320	$141
Return visit (30+ min)	48	$5,980	$98
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	51	$3,824	$72
Colorectal cancer screening; colonoscopy on individual at high risk	15	$3,213	$214
Long return visit (40+ min)	21	$2,894	$138
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	161	$823	$5

2018: 10 services

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Original Medicare services billed in 2018

Biopsy of large bowel using a flexible endoscope	106	$13,391	$126
Removal of polyps or growths of large bowel using an endoscope with mechanical snare	48	$9,032	$188
Return visit (30+ min)	49	$6,666	$99
New patient visit (45+ min)	44	$5,797	$132
Removal of large bowel tissue using a flexible endoscope	18	$5,475	$304
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	39	$3,178	$79
Long return visit (40+ min)	22	$3,019	$131
Colorectal cancer screening; colonoscopy on individual at high risk	14	$2,950	$211
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	168	$838	$5
Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes	54	$658	$11

2017: 8 services

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Original Medicare services billed in 2017

Biopsy of large bowel using a flexible endoscope	44	$6,056	$138
New patient visit (45+ min)	21	$3,090	$147
Return visit (30+ min)	23	$2,930	$101
Long return visit (40+ min)	16	$2,564	$135
Removal of polyps or growths of large bowel using an endoscope with mechanical snare	12	$2,459	$205
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	28	$2,452	$88
Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes	39	$534	$11
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	80	$366	$5

Drugs they prescribed that Part D paid

$621,398

Pharmacies billed $621,398 in 2024.

This is pharmacy cost, not the office bill, and not what patients paid.

Opioids were 0% of their Part D prescriptions (0 of 687) in 2024. At or below the middle of the specialty; the typical gastroenterology clinician is at 0%.

500 generic and 187 brand-name prescriptions · $621,398 in drug cost · 15 antibiotic prescriptions to 12 people.

Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.

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Largest Part D drug costs

Creon	34	$93,617	$2,753
Sod Sulf-Potass Sulf-Mag Sulf	236	$15,778	$67
Linzess	13	$14,718	$1,132
Mesalamine	15	$14,704	$980
Famotidine	45	$1,840	$41

See all 8 drugs

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Every Part D drug this clinician prescribed

Creon	34	$93,617	$2,753
Sod Sulf-Potass Sulf-Mag Sulf	236	$15,778	$67
Linzess	13	$14,718	$1,132
Mesalamine	15	$14,704	$980
Famotidine	45	$1,840	$41
Omeprazole	110	$1,063	$10
Pantoprazole	50	$855	$17
Peg 3350-Electrolyte	24	$464	$19

Year by year

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Part D prescribing by year

2024	687	358	0% (0)	27%	$621,398
2023	609	313	0% (0)	None	$445,793
2022	515	214	0% (0)	None	$485,845
2021	558	288	0% (0)	50%	$218,157
2020	410	217	0% (0)	52%	$372,812
2019	399	208	0% (0)	44%	$59,935
2018	307	191	0% (0)	36%	$42,672
2017	286	202	0% (0)	30%	$49,888
2016	347	276	None	15%	$33,387
2015	66	56	0% (0)	None	$4,432
2013	13	None	0% (0)	None	$1,046

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

See the drugs prescribed each year

2023: 9 drugs

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Part D drugs prescribed in 2023

Creon	27	$80,787	$2,992
Linzess	26	$26,891	$1,034
Mesalamine	12	$15,124	$1,260
Sod Sulf-Potass Sulf-Mag Sulf	166	$13,291	$80
Famotidine	43	$4,706	$109
Omeprazole	105	$1,580	$15
Peg 3350-Electrolyte	35	$867	$25
Pantoprazole	38	$742	$20
Lactulose	13	$59	$5

2022: 10 drugs

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Part D drugs prescribed in 2022

Stelara	12	$320,053	$26,671
Creon	23	$55,729	$2,423
Zenpep	12	$32,043	$2,670
Linzess	35	$27,973	$799
Mesalamine	17	$13,528	$796
Suprep	85	$9,824	$116
Famotidine	31	$5,265	$170
Omeprazole	109	$1,471	$13
Pantoprazole	32	$681	$21
Peg 3350-Electrolyte	28	$517	$18

2021: 10 drugs

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Part D drugs prescribed in 2021

Linzess	40	$24,760	$619
Suprep	168	$18,599	$111
Mesalamine	16	$13,005	$813
Famotidine	37	$5,741	$155
Budesonide Ec	15	$3,648	$243
Clenpiq	12	$2,100	$175
Omeprazole	75	$1,464	$20
Dicyclomine	19	$544	$29
Peg 3350-Electrolyte	23	$395	$17
Pantoprazole	26	$356	$14

2020: 7 drugs

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Part D drugs prescribed in 2020

Suprep	133	$14,003	$105
Linzess	16	$11,845	$740
Mesalamine	17	$11,403	$671
Famotidine	33	$6,167	$187
Omeprazole	54	$737	$14
Diphenoxylate-Atropine	16	$562	$35
Peg 3350-Electrolyte	16	$320	$20

2019: 8 drugs

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Part D drugs prescribed in 2019

Mesalamine	16	$13,861	$866
Suprep	132	$13,251	$100
Linzess	11	$6,706	$610
Famotidine	74	$1,378	$19
Omeprazole	40	$703	$18
Ranitidine	18	$373	$21
Gavilyte-N	18	$310	$17
Peg 3350-Electrolyte	11	$194	$18

2018: 7 drugs

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Part D drugs prescribed in 2018

Lialda	11	$15,602	$1,418
Suprep	24	$2,226	$93
Peg 3350-Electrolyte	66	$1,108	$17
Famotidine	20	$1,019	$51
Omeprazole	29	$888	$31
Gavilyte-N	43	$704	$16
Pantoprazole	13	$294	$23

2017: 5 drugs

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Part D drugs prescribed in 2017

Lialda	11	$16,450	$1,495
Gavilyte-C	101	$1,709	$17
Peg 3350-Electrolyte	41	$582	$14
Omeprazole	20	$403	$20
Gavilyte-N	12	$213	$18

2016: 2 drugs

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Part D drugs prescribed in 2016

Gavilyte-C	222	$3,786	$17
Metronidazole	11	$135	$12

2015: 1 drug

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Part D drugs prescribed in 2015

Gavilyte-C	44	$748	$17

Money from drug and device companies

$1,138 in 2025

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Industry payments by year

2025	10	42	None	$1,138
2024	2	5	None	$247
2023	2	2	None	$269
2022	1	1	None	$125
2019	2	2	None	$110

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

Abbvie	Linzess	$285	17 payments Meals for Linzess · 2025-12-12 · $9 Meals for Linzess · 2025-12-05 · $27 Meals for Linzess · 2025-11-19 · $7 Meals for Linzess · 2025-11-12 · $12 Meals for Linzess · 2025-10-29 · $18 Meals · 2025-09-19 · $27 Meals for Creon · 2025-09-09 · $7 Meals for Linzess · 2025-09-05 · $15 Meals for Linzess · 2025-08-22 · $16 Meals for Viberzi · 2025-08-07 · $29 Meals for Viberzi · 2025-07-25 · $14 Meals for Creon · 2025-06-07 · $8 Meals for Linzess · 2025-05-27 · $15 Meals for Creon · 2025-04-16 · $14 Meals for Creon · 2025-03-25 · $23 Meals for Creon · 2025-03-21 · $14 Meals for Linzess · 2025-01-22 · $30
Madrigal Pharmaceuticals	Rezdiffra	$223	4 payments Meals for Rezdiffra · 2025-09-24 · $35 Meals for Rezdiffra · 2025-06-10 · $28 Meals for Rezdiffra · 2025-03-17 · $32 Meals for Rezdiffra · 2025-01-21 · $127
Lilly USA	Omvoh	$218	4 payments Meals for Omvoh · 2025-08-18 · $26 Meals for Omvoh · 2025-05-01 · $125 Meals for Omvoh · 2025-04-07 · $34 Meals for Omvoh · 2025-02-25 · $33
Salix Pharmaceuticals a division of Bausch Health US	Xifaxan	$99	4 payments Meals for Xifaxan · 2025-12-21 · $25 Meals for Xifaxan · 2025-10-24 · $25 Meals for Xifaxan · 2025-07-08 · $25 Meals for Xifaxan · 2025-06-23 · $25
Janssen Biotech	Tremfya	$74	3 payments Meals for Tremfya · 2025-09-11 · $26 Meals for Tremfya · 2025-08-13 · $24 Meals for Tremfya · 2025-04-29 · $24
Aimmune Therapeutics	Zenpep	$63	2 payments Meals for Zenpep · 2025-10-06 · $37 Meals for Vowst · 2025-08-15 · $26

See all 42 published payments

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Every published payment

Salix Pharmaceuticals a division of Bausch Health US	Meals · 2025-12-21	Xifaxan	$25
Ardelyx	Meals · 2025-12-18	Ibsrela	$28
Abbvie	Meals · 2025-12-12	Linzess	$9
Abbvie	Meals · 2025-12-05	Linzess	$27
Novo Nordisk	Meals · 2025-11-20	Wegovy	$20
Abbvie	Meals · 2025-11-19	Linzess	$7
Abbvie	Meals · 2025-11-12	Linzess	$12
Phathom Pharmaceuticals	Meals · 2025-11-05	Voquezna	$22
Celltrion USA	Meals · 2025-10-30	Vegzelma	$21
Abbvie	Meals · 2025-10-29	Linzess	$18
Salix Pharmaceuticals a division of Bausch Health US	Meals · 2025-10-24	Xifaxan	$25
Ardelyx	Meals · 2025-10-23	Ibsrela	$28
Aimmune Therapeutics	Meals · 2025-10-06	Zenpep	$37
Madrigal Pharmaceuticals	Meals · 2025-09-24	Rezdiffra	$35
Abbvie	Meals · 2025-09-19	None	$27
Janssen Biotech	Meals · 2025-09-11	Tremfya	$26
Abbvie	Meals · 2025-09-09	Creon	$7
Abbvie	Meals · 2025-09-05	Linzess	$15
Abbvie	Meals · 2025-08-22	Linzess	$16
Lilly USA	Meals · 2025-08-18	Omvoh	$26
Aimmune Therapeutics	Meals · 2025-08-15	Vowst	$26
Janssen Biotech	Meals · 2025-08-13	Tremfya	$24
Abbvie	Meals · 2025-08-07	Viberzi	$29
Abbvie	Meals · 2025-07-25	Viberzi	$14
Salix Pharmaceuticals a division of Bausch Health US	Meals · 2025-07-08	Xifaxan	$25
Salix Pharmaceuticals a division of Bausch Health US	Meals · 2025-06-23	Xifaxan	$25
Madrigal Pharmaceuticals	Meals · 2025-06-10	Rezdiffra	$28
Abbvie	Meals · 2025-06-07	Creon	$8
Abbvie	Meals · 2025-05-27	Linzess	$15
Lilly USA	Meals · 2025-05-01	Omvoh	$125
Janssen Biotech	Meals · 2025-04-29	Tremfya	$24
Abbvie	Meals · 2025-04-16	Creon	$14
Lilly USA	Meals · 2025-04-07	Omvoh	$34
Abbvie	Meals · 2025-03-25	Creon	$23
Abbvie	Meals · 2025-03-21	Creon	$14
Madrigal Pharmaceuticals	Meals · 2025-03-17	Rezdiffra	$32
Celltrion USA	Meals · 2025-03-10	Vegzelma	$33
Phathom Pharmaceuticals	Meals · 2025-03-04	Voquezna	$22
Phathom Pharmaceuticals	Meals · 2025-03-04	Voquezna	$2
Lilly USA	Meals · 2025-02-25	Omvoh	$33
Abbvie	Meals · 2025-01-22	Linzess	$30
Madrigal Pharmaceuticals	Meals · 2025-01-21	Rezdiffra	$127

See earlier years (2024, 2023, 2022, 2019)

2024: $247

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Payments by company in 2024

Lilly USA	Omvoh	$189	3 payments Meals for Omvoh · 2024-12-06 · $30 Meals for Omvoh · 2024-10-22 · $34 Meals for Omvoh · 2024-05-30 · $125
Abbvie	Creon	$58	2 payments Meals for Creon · 2024-11-06 · $30 Meals for Creon · 2024-09-11 · $28

2023: $269

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Payments by company in 2023

E.R. Squibb & Sons L.L.C.	Zeposia	$150	1 payment Meals for Zeposia · 2023-10-12 · $150
AbbVie	Rinvoq	$119	1 payment Meals for Rinvoq · 2023-09-07 · $119

2022: $125

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Payments by company in 2022

Abbvie	Skyrizi	$125	1 payment Meals for Skyrizi · 2022-10-20 · $125

2019: $110

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Payments by company in 2019

AbbVie	None	$91	1 payment Meals · 2019-05-30 · $91
Takeda Pharmaceuticals U.S.A.	Entyvio	$19	1 payment Meals for Entyvio · 2019-07-22 · $19

Professional record

NPI: 1497847248
Licence: CA A066832
Trained: State University of New York at Stony Brook, School of Medicine, 1995
Group: Sutter Bay Medical Foundation
Video visits: Lists video visits
Gender: Male

More record details

Sole proprietor: No
Taxonomy: Federal specialty code 207RG0100X (207RG0100X)
Mailing address: 325 Distel Cir, Los Altos, CA, 94022
NPI first listed: 2006-09-29
NPI last updated: 2020-06-08
NPI record certified: 2020-06-08

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

Extra NPI addresses: 3801 Miranda Ave, Palo Alto, CA, 94304