Woody Chang, MD | UniHealth

Offices

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

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Hospitals listed: 555790. That is not proof they admit you there this week.

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. Chang’s office at (408) 739-6000 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

DualConnect (HMO D-SNP)	Santa Clara Family Health Plan	Listed	Sep 1, 2026

California Medical Board record

Licence A152122 · Current

Licensed to practise in California · since 2017 · expires 2027-09-30 · Stanford University School of Medicine.

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

Original Medicare doctor bills

$103,317

Medicare paid this office $103,317 for 138 people.

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

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Largest Original Medicare bills

Subsequent nursing facility care with moderate level of medical decision making, per day at least 30 minutes	98	$64,127	$98
Subsequent nursing facility care with high level of medical decision making, per day at least 45 minutes	41	$14,994	$138
Initial nursing facility care with high level of medical decision making, per day 50 minutes or more	74	$13,938	$164
Nursing facility discharge management, more than 30 minutes	59	$7,078	$118

Who their Medicare patients are

138 Original Medicare patients in 2024. Average age 84 · 85 and older 50% · Women 60% · Also on Medicaid 13% · Health risk score 1.71. At or below the middle of the specialty; the typical geriatric medicine clinician is at 1.84.

Conditions among them: High blood pressure 75% · Chronic kidney disease 51% · Depression 45% · Dementia 42% · Atrial fibrillation 40% · Diabetes 38% · Heart failure 35% · Coronary heart disease 33% · Stroke 25% · Cancer 19% · COPD 17%.

The office billed $343,426, Medicare allowed $132,527 and paid $103,317; for 944 services of 8 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	138	944	84	1.71	$343,426	$103,317
2023	131	970	84	2.07	$344,963	$108,518
2022	99	730	83	2.01	$278,081	$77,038
2021	96	776	82	2.20	$245,396	$70,966
2020	75	623	82	2.20	$190,477	$58,295
2019	148	813	82	1.89	$233,321	$67,758
2018	25	141	79	2.88	$35,045	$10,766

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

Subsequent nursing facility care with moderate level of medical decision making, per day at least 30 minutes	108	$65,366	$99
Initial nursing facility care with high level of medical decision making, per day 50 minutes or more	88	$17,120	$170
Subsequent nursing facility care with high level of medical decision making, per day at least 45 minutes	51	$14,481	$141
Nursing facility discharge management, more than 30 minutes	73	$9,701	$123

2022: 4 services

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Original Medicare services billed in 2022

Subsequent nursing facility care with high level of medical decision making, per day at least 45 minutes	68	$35,841	$124
Subsequent nursing facility care with moderate level of medical decision making, per day at least 30 minutes	63	$23,760	$83
Initial nursing facility care with high level of medical decision making, per day 50 minutes or more	60	$9,583	$150
Nursing facility discharge management, more than 30 minutes	43	$4,437	$96

2021: 6 services

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Original Medicare services billed in 2021

Subsequent nursing facility care with moderate level of medical decision making, per day at least 30 minutes	79	$31,635	$84
Initial nursing facility care with high level of medical decision making, per day 50 minutes or more	75	$13,310	$153
Subsequent nursing facility care with high level of medical decision making, per day at least 45 minutes	35	$7,983	$127
Nursing facility discharge management, more than 30 minutes	57	$6,259	$99
Subsequent nursing facility care with straightforward level of medical decision making, per day 20 minutes or more	29	$6,037	$66
Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	50	$2,699	$53

2020: 7 services

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Original Medicare services billed in 2020

Subsequent nursing facility care with moderate level of medical decision making, per day at least 30 minutes	59	$24,552	$87
Subsequent nursing facility care with high level of medical decision making, per day at least 45 minutes	31	$11,736	$129
Initial nursing facility care with high level of medical decision making, per day 50 minutes or more	51	$8,475	$154
Nursing facility discharge management, more than 30 minutes	40	$4,145	$99
Subsequent nursing facility care with straightforward level of medical decision making, per day 20 minutes or more	24	$3,333	$56
Extended patient service without direct patient contact, first hour	13	$2,217	$106
Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	35	$1,799	$50

2019: 7 services

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Original Medicare services billed in 2019

Subsequent nursing facility care with straightforward level of medical decision making, per day 20 minutes or more	105	$21,609	$60
Initial nursing facility care with high level of medical decision making, per day 50 minutes or more	95	$14,995	$147
Subsequent nursing facility care with moderate level of medical decision making, per day at least 30 minutes	65	$12,062	$83
Nursing facility discharge management, more than 30 minutes	82	$7,960	$96
Subsequent nursing facility care with high level of medical decision making, per day at least 45 minutes	24	$5,075	$124
Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	28	$1,425	$51
Extended patient service without direct patient contact, first hour	11	$1,222	$94

2018: 3 services

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Original Medicare services billed in 2018

Subsequent nursing facility care with straightforward level of medical decision making, per day 20 minutes or more	23	$5,938	$64
Initial nursing facility care with high level of medical decision making, per day 50 minutes or more	14	$2,125	$152
Nursing facility discharge management, more than 30 minutes	11	$1,062	$97

Drugs they prescribed that Part D paid

$87,867

Pharmacies billed $87,867 in 2024.

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

Opioids were 2% of their Part D prescriptions (31 of 1,402) in 2024. Above the middle of the specialty; the typical geriatric medicine clinician is at 2%. Long-acting opioids: 42% of their opioid prescriptions.

1,113 generic and fewer than 11 brand-name prescriptions · $87,867 in drug cost · 56 antibiotic prescriptions to 16 people · 19 antipsychotic prescriptions to people over 65.

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

Eliquis	86	$25,211	$293
Tradjenta	19	$5,402	$284
Buprenorphine	12	$2,819	$235
Tamsulosin	45	$1,257	$28
Brimonidine	22	$1,239	$56

See all 40 drugs

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Every Part D drug this clinician prescribed

Eliquis	86	$25,211	$293
Tradjenta	19	$5,402	$284
Buprenorphine	12	$2,819	$235
Tamsulosin	45	$1,257	$28
Brimonidine	22	$1,239	$56
Gabapentin	46	$1,105	$24
Atorvastatin	52	$1,041	$20
Valacyclovir	14	$1,021	$73
Mirtazapine	33	$982	$30
Potassium Chloride	29	$967	$33
Finasteride	13	$901	$69
Escitalopram	40	$898	$22
Fluticasone Propionate	30	$878	$29
Losartan	37	$863	$23
Hydroxychloroquine Sulfate	13	$748	$58
Furosemide	107	$712	$7
Aripiprazole	16	$710	$44
Pantoprazole	23	$615	$27
Amlodipine Besylate	38	$614	$16
Latanoprost	18	$552	$31
Diltiazem 24hr Er (Cd)	12	$515	$43
Carvedilol	22	$466	$21
Levetiracetam	12	$463	$39
Ramipril	12	$403	$34
Cyclobenzaprine	14	$352	$25
Oxybutynin Chloride	17	$340	$20
Bupropion Hcl Sr	12	$336	$28
Warfarin	21	$333	$16
Lisinopril	18	$329	$18
Metoprolol	16	$299	$19
Metformin	15	$285	$19
Tolterodine	23	$282	$12
Levothyroxine	26	$270	$10
Ondansetron	11	$239	$22
Triamcinolone Acetonide	13	$226	$17
Bupropion Xl	12	$205	$17
Timolol Maleate	13	$203	$16
Metoprolol	16	$179	$11
Rosuvastatin	12	$169	$14
Amoxicillin	11	$68	$6

Year by year

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Part D prescribing by year

2024	1,402	63	2% (31)	None	$87,867
2023	1,693	65	2% (30)	None	$128,162
2022	1,171	61	2% (23)	None	$77,535
2021	1,078	78	3% (36)	19%	$66,529
2020	1,244	85	5% (62)	None	$69,715
2019	1,086	108	9% (94)	None	$57,332
2018	239	28	11% (27)	17%	$10,609
2017	181	21	None	14%	$8,813
2016	44	22	0% (0)	None	$3,787
2015	15	None	0% (0)	0%	$398

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

See the drugs prescribed each year

2023: 50 drugs

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Part D drugs prescribed in 2023

Eliquis	105	$29,312	$279
Spiriva Handihaler	16	$7,824	$489
Farxiga	22	$6,195	$282
Myrbetriq	17	$4,505	$265
Tradjenta	13	$3,384	$260
Brinzolamide	11	$3,217	$292
Entacapone	11	$2,982	$271
Gabapentin	83	$2,063	$25
Duloxetine	21	$1,482	$71
Tamsulosin	39	$1,376	$35
Carbidopa-Levodopa	13	$1,346	$104
Mirtazapine	37	$1,114	$30
Potassium Chloride	29	$1,014	$35
Hydroxychloroquine Sulfate	12	$1,008	$84
Atorvastatin	61	$946	$16
Levetiracetam	13	$897	$69
Levothyroxine	69	$825	$12
Latanoprost	20	$806	$40
Pantoprazole	31	$772	$25
Simvastatin	29	$709	$24
Pregabalin	12	$660	$55
Losartan	48	$650	$14
Rosuvastatin	16	$601	$38
Fluticasone Propionate	24	$599	$25
Oxybutynin Chloride Er	12	$517	$43
Metformin	36	$472	$13
Escitalopram	27	$445	$16
Furosemide	69	$431	$6
Nystatin	13	$420	$32
Aripiprazole	13	$412	$32
Metoprolol	30	$408	$14
Amlodipine Besylate	37	$390	$11
Glipizide Er	13	$368	$28
Montelukast	12	$357	$30
Metoprolol	40	$351	$9
Carvedilol	23	$311	$14
Trazodone	14	$300	$21
Lisinopril	20	$278	$14
Pentoxifylline	11	$267	$24
Bupropion Xl	12	$252	$21
Warfarin	20	$229	$11
Ondansetron	12	$215	$18
Pioglitazone	11	$183	$17
Timolol Maleate	12	$174	$15
Prednisone	14	$170	$12
Amoxicillin-Clavulanate Potass	14	$147	$11
Tolterodine	14	$145	$10
Atenolol	11	$143	$13
Finasteride	11	$137	$12
Sertraline	11	$77	$7

2022: 41 drugs

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Part D drugs prescribed in 2022

Eliquis	36	$9,851	$274
Spiriva Handihaler	21	$8,093	$385
Entacapone	18	$5,357	$298
Brinzolamide	11	$3,310	$301
Carbidopa-Levodopa	18	$2,363	$131
Lantus Solostar	11	$1,989	$181
Potassium Chloride	21	$1,617	$77
Gabapentin	57	$1,386	$24
Oxybutynin Chloride Er	13	$883	$68
Pantoprazole	29	$881	$30
Duloxetine	11	$821	$75
Tamsulosin	24	$679	$28
Pravastatin	15	$671	$45
Levetiracetam	14	$665	$47
Furosemide	53	$653	$12
Hydroxychloroquine Sulfate	11	$630	$57
Levothyroxine	33	$582	$18
Digoxin	12	$498	$41
Ropinirole	15	$443	$30
Losartan	31	$435	$14
Atorvastatin	26	$403	$15
Clonazepam	13	$400	$31
Simvastatin	46	$397	$9
Warfarin	40	$353	$9
Hydrocodone-Acetaminophen	12	$332	$28
Mirtazapine	23	$304	$13
Propranolol	13	$289	$22
Diltiazem	13	$241	$19
Carvedilol	18	$238	$13
Quetiapine	14	$216	$15
Metoprolol	17	$207	$12
Bupropion Hcl Sr	11	$202	$18
Montelukast	12	$202	$17
Citalopram Hbr	12	$200	$17
Atenolol	11	$187	$17
Aripiprazole	12	$170	$14
Trazodone	14	$164	$12
Metoprolol	16	$159	$10
Amlodipine Besylate	18	$150	$8
Lisinopril	11	$145	$13
Sertraline	17	$143	$8

2021: 37 drugs

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Part D drugs prescribed in 2021

Eliquis	30	$9,145	$305
Restasis	20	$6,776	$339
Spiriva	19	$6,398	$337
Entacapone	13	$6,050	$465
Carbidopa-Levodopa	13	$2,079	$160
Pravastatin	15	$1,016	$68
Levetiracetam	23	$1,016	$44
Oxybutynin Chloride Er	12	$984	$82
Nystop	18	$866	$48
Digoxin	15	$716	$48
Gabapentin	45	$684	$15
Hydrocodone-Acetaminophen	17	$598	$35
Atorvastatin	48	$583	$12
Furosemide	39	$574	$15
Aripiprazole	17	$546	$32
Divalproex	11	$513	$47
Ropinirole	12	$469	$39
Levothyroxine	41	$465	$11
Clonazepam	12	$448	$37
Tamsulosin	20	$404	$20
Mirtazapine	21	$381	$18
Sertraline	21	$312	$15
Simvastatin	24	$307	$13
Clopidogrel	19	$302	$16
Pantoprazole	24	$298	$12
Warfarin	26	$262	$10
Carvedilol	20	$255	$13
Propranolol	12	$252	$21
Losartan	22	$251	$11
Lisinopril	20	$244	$12
Omeprazole	19	$232	$12
Montelukast	13	$227	$17
Quetiapine	16	$224	$14
Metoprolol	17	$220	$13
Citalopram Hbr	14	$172	$12
Metoprolol	15	$116	$8
Amlodipine Besylate	20	$113	$6

2020: 38 drugs

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Part D drugs prescribed in 2020

Renvela	13	$10,120	$778
Spiriva	19	$5,293	$279
Xtampza Er	29	$3,078	$106
Lantus	11	$3,035	$276
Carbidopa-Levodopa	15	$1,480	$99
Oxcarbazepine	14	$1,280	$91
Gabapentin	99	$1,081	$11
Nystop	18	$865	$48
Atorvastatin	65	$834	$13
Sertraline	25	$821	$33
Levetiracetam	17	$756	$44
Levothyroxine	49	$615	$13
Aripiprazole	13	$602	$46
Mirtazapine	19	$473	$25
Tamsulosin	23	$461	$20
Pantoprazole	38	$435	$11
Hydrocodone-Acetaminophen	18	$387	$21
Metoprolol	19	$353	$19
Clopidogrel	16	$344	$22
Ondansetron	15	$330	$22
Losartan	43	$307	$7
Propranolol	12	$293	$24
Hydralazine	11	$290	$26
Clonazepam	15	$283	$19
Citalopram Hbr	23	$271	$12
Amlodipine Besylate	38	$250	$7
Diltiazem	12	$244	$20
Metoprolol	30	$187	$6
Quetiapine	16	$184	$11
Escitalopram	19	$182	$10
Sodium Chloride	11	$171	$16
Simvastatin	21	$152	$7
Lisinopril	21	$131	$6
Prednisone	13	$126	$10
Montelukast	11	$126	$11
Furosemide	23	$112	$5
Zolpidem	12	$82	$7
Carvedilol	11	$76	$7

2019: 37 drugs

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Part D drugs prescribed in 2019

Lantus	30	$9,165	$306
Eliquis	11	$3,289	$299
Aripiprazole	36	$1,854	$52
Chantix	16	$859	$54
Mirtazapine	30	$843	$28
Fluoxetine	11	$759	$69
Hydrocodone-Acetaminophen	32	$715	$22
Sertraline	25	$675	$27
Atorvastatin	43	$650	$15
Enoxaparin	11	$646	$59
Nystop	12	$570	$48
Ondansetron	15	$430	$29
Pantoprazole	29	$364	$13
Carbidopa-Levodopa	12	$360	$30
Metoprolol	21	$348	$17
Gabapentin	31	$322	$10
Tramadol	31	$290	$9
Escitalopram	20	$257	$13
Levothyroxine	22	$245	$11
Latanoprost	15	$236	$16
Trazodone	18	$223	$12
Tamsulosin	12	$220	$18
Potassium Chloride	12	$196	$16
Furosemide	30	$191	$6
Glipizide	16	$190	$12
Metformin	18	$181	$10
Methadone	18	$152	$8
Amoxicillin-Clavulanate Potass	13	$139	$11
Metoprolol	24	$139	$6
Triamcinolone Acetonide	11	$108	$10
Lisinopril	15	$108	$7
Amlodipine Besylate	23	$98	$4
Warfarin	18	$98	$5
Pravastatin	13	$96	$7
Bupropion Hcl Sr	12	$95	$8
Prednisone	11	$84	$8
Carvedilol	11	$57	$5

2018: 2 drugs

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Part D drugs prescribed in 2018

Hydrocodone-Acetaminophen	14	$322	$23
Warfarin	18	$97	$5

Professional record

NPI: 1295153187
Licence: CA A152122California A152122: Current · expires 2027-09-30
Trained: Stanford University School of Medicine, 2014
Group: Sutter Bay Medical Foundation
Gender: Male

More record details

Sole proprietor: Yes
Taxonomy: Federal specialty code 207RG0300X (207RG0300X); Student in a training program (390200000X)
Mailing address: 2350 W El Camino Real, Fl 2, Mountain View, CA, 94040
NPI first listed: 2014-03-29
NPI last updated: 2018-12-10

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