Cuong Tonthat, DDS

Offices

1 location

Plans that list them

1 plan · 1 carrier

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Tonthat’s office at (408) 295-2530 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

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Plans whose provider directory lists this clinician

AARP Medicare Advantage from UHC CA-10 (HMO-POS)	UnitedHealthcare	Listed, may be out of date	Jun 10, 2026

California Medical Board record

Licence G45206 · Current

Licensed to practise in California · since 1981 · expires 2027-07-31 · Northwestern University Medical School.

Matched on the licence number without its letter prefix; check the name before relying on it.

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

School, training and certification

What this clinician told their state board, medical school and everything before it. Only some states publish this, so nothing here means the state does not say, not that there was no training or certification.

Specialty certification

American Board of Colon and Rectal Surgery - Colon and Rectal Surgery

Medicaid work

$79,332 in 2024

Medicaid paid $79,332 for 2,554 billed services this clinician did in 2024, up to 56 people in a month for one service.

Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.

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Largest Medicaid services in 2024

Service	301	$27,068
Service	266	$20,745
Service	146	$9,636
Service	355	$7,641
Service	90	$4,725
Service	1,132	$4,568
Service	194	$2,328
Service	55	$1,760
Service	15	$861

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Medicaid work by year

2024	2,554	9	56	$79,332
2023	2,656	9	58	$85,202
2022	3,356	10	69	$109,007
2021	3,432	10	75	$90,082
2020	2,260	9	58	$62,849
2019	3,218	10	77	$109,589
2018	3,774	11	105	$108,455

See the largest Medicaid services in earlier years

2023

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Largest Medicaid services in 2023

Service	304	$27,090
Service	307	$25,990
Service	371	$7,954
Service	93	$6,193
Service	107	$5,552
Service	1,157	$4,652
Service	70	$4,018
Service	207	$2,472
Service	40	$1,280

2022

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Largest Medicaid services in 2022

Service	346	$30,938
Service	335	$27,525
Service	179	$11,798
Service	427	$9,175
Service	146	$8,380
Service	137	$7,193
Service	1,377	$5,599
Service	106	$3,384
Service	278	$3,336
Service	25	$1,680

2021

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Largest Medicaid services in 2021

Service	338	$30,263
Service	362	$16,189
Service	439	$9,445
Service	136	$8,910
Service	121	$6,888
Service	1,477	$5,899
Service	151	$4,500
Service	116	$3,712
Service	278	$3,336
Service	14	$941

2020

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Largest Medicaid services in 2020

Service	242	$21,600
Service	289	$12,690
Service	332	$7,128
Service	92	$6,006
Service	890	$4,319
Service	67	$3,788
Service	119	$3,555
Service	178	$2,130
Service	51	$1,632

2019

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Largest Medicaid services in 2019

Service	415	$37,260
Service	489	$21,195
Service	540	$11,599
Service	172	$11,022
Service	255	$7,590
Service	784	$6,899
Service	172	$5,488
Service	86	$4,879
Service	281	$3,369
Service	24	$288

2018

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Largest Medicaid services in 2018

Service	470	$31,680
Service	563	$17,370
Service	649	$12,855
Service	247	$12,661
Service	299	$8,873
Service	142	$8,093
Service	922	$7,263
Service	136	$4,076
Service	285	$3,118
Service	32	$2,150
Service	29	$316

Drugs they prescribed that Part D paid

$126

Pharmacies billed $126 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 31) in 2024. Too few prescriptions to judge: with under about 50 a year, a handful of patients can swing this share.

31 generic and 0 brand-name prescriptions · $126 in drug cost · 24 antibiotic prescriptions to 21 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

Amoxicillin	20	$77	$3

Year by year

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Part D prescribing by year

2024	31	26	0% (0)	0%	$126
2023	27	22	0% (0)	0%	$180
2022	49	27	0% (0)	0%	$426
2021	85	49	None	0%	$649
2020	69	36	None	0%	$486
2019	76	44	20% (15)	0%	$491
2018	75	47	17% (13)	0%	$542
2017	56	34	25% (14)	0%	$341
2016	55	35	27% (15)	0%	$372
2015	37	25	None	0%	$243
2014	33	30	None	0%	$183
2013	12	None	None	0%	$136

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

See the drugs prescribed each year

2023: 1 drug

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Part D drugs prescribed in 2023

Amoxicillin	22	$121	$6

2022: 2 drugs

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Part D drugs prescribed in 2022

Chlorhexidine Gluconate	14	$190	$14
Amoxicillin	33	$161	$5

2021: 2 drugs

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Part D drugs prescribed in 2021

Amoxicillin	57	$378	$7
Chlorhexidine Gluconate	15	$131	$9

2020: 2 drugs

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Part D drugs prescribed in 2020

Chlorhexidine Gluconate	17	$164	$10
Amoxicillin	36	$158	$4

2019: 3 drugs

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Part D drugs prescribed in 2019

Amoxicillin	43	$248	$6
Chlorhexidine Gluconate	13	$124	$10
Acetaminophen-Codeine	13	$59	$5

2018: 1 drug

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Part D drugs prescribed in 2018

Amoxicillin	52	$294	$6

2017: 2 drugs

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Part D drugs prescribed in 2017

Amoxicillin	31	$159	$5
Acetaminophen-Codeine	13	$65	$5

2016: 2 drugs

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Part D drugs prescribed in 2016

Amoxicillin	31	$152	$5
Acetaminophen-Codeine	13	$64	$5

2015: 1 drug

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Part D drugs prescribed in 2015

Amoxicillin	22	$117	$5

2014: 1 drug

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Part D drugs prescribed in 2014

Amoxicillin	26	$147	$6

Professional record

NPI: 1942350558
Licence: CA 45206California G45206: Current · expires 2027-07-31

More record details

Sole proprietor: Yes
Taxonomy: Federal specialty code 1223G0001X (1223G0001X)
Mailing address: 56 N 13th St, Ste. 102, San Jose, CA, 95112
NPI first listed: 2007-01-12
NPI last updated: 2007-07-08

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