Kenneth R Wulff, MD

Offices

2 locations · Thinh Duy Mai MD Apc · Hope Services

Looking this up.

Plans that list them

5 plans · 2 carriers

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

5 of 5 plans

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Plans whose provider directory lists this clinician

Anthem Full Dual Advantage Aligned (HMO D-SNP)	Anthem Blue Cross	Listed	Oct 3, 2026
Kaiser Permanente Dual Complete North P2 (HMO D-SNP)	Kaiser Permanente	Listed	Sep 1, 2026
Kaiser Permanente Dual Complete North P23 (HMO D-SNP)	Kaiser Permanente	Listed	Sep 1, 2026
Kaiser Permanente Sr Adv Basic Santa Clara (HMO)	Kaiser Permanente	Listed	Sep 1, 2026
Kaiser Permanente Sr Adv Enhanced Santa Clara (HMO)	Kaiser Permanente	Listed	Sep 1, 2026

California Medical Board record

Licence G32683 · Current

Licensed to practise in California · since 1976 · expires 2027-06-30 · Boston University School of Medicine.

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

Original Medicare doctor bills

$7,756

Medicare paid this office $7,756 for 15 people.

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

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Largest Original Medicare bills

Return visit (30+ min)	13	$4,055	$110

Who their Medicare patients are

15 Original Medicare patients in 2024. Average age 42 · Under 65 100% · 85 and older 0% · Also on Medicaid 100% · Health risk score 1.16. At or below the middle of the specialty; the typical psychiatry clinician is at 1.35.

The office billed $47,903, Medicare allowed $11,183 and paid $7,756; for 80 services of 5 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	15	80	42	1.16	$47,903	$7,756
2023	19	101	45	1.40	$33,597	$11,730
2022	39	144	50	1.40	$48,678	$15,144
2021	22	117	51	0.74	$31,120	$11,019
2020	11	29	50	0.83	$7,484	$2,198
2016	105	229	49	0.90	$104,201	$15,642
2015	17	17	49	1.26	$5,092	$1,294

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

2022: 2 services

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Original Medicare services billed in 2022

Return visit (30+ min)	20	$3,981	$93
Return visit (30+ min)	17	$2,735	$85

2021: 1 service

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Original Medicare services billed in 2021

Short return visit (20+ min)	13	$5,114	$75

2016: 3 services

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Original Medicare services billed in 2016

Return visit (30+ min)	90	$11,631	$79
Long return visit (40+ min)	16	$1,996	$95
Short return visit (20+ min)	52	$1,917	$34

2015: 1 service

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Original Medicare services billed in 2015

Short return visit (20+ min)	11	$577	$52

Drugs they prescribed that Part D paid

$24,720

Pharmacies billed $24,720 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 730) in 2024. At or below the middle of the specialty; the typical psychiatry clinician is at 0%.

681 generic and 49 brand-name prescriptions · $24,720 in drug cost · 82 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

Chlorpromazine	23	$6,028	$262
Paliperidone Er	11	$3,722	$338
Aripiprazole	40	$1,869	$47
Risperidone	92	$1,631	$18
Propranolol	14	$1,498	$107

See all 22 drugs

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Every Part D drug this clinician prescribed

Chlorpromazine	23	$6,028	$262
Paliperidone Er	11	$3,722	$338
Aripiprazole	40	$1,869	$47
Risperidone	92	$1,631	$18
Propranolol	14	$1,498	$107
Amantadine	12	$1,126	$94
Haloperidol	12	$1,078	$90
Divalproex	29	$1,058	$36
Divalproex Sodium Er	24	$854	$36
Sertraline	75	$666	$9
Valproic Acid	15	$525	$35
Lithium Carbonate	71	$480	$7
Olanzapine	55	$438	$8
Quetiapine	28	$397	$14
Fluoxetine	28	$238	$9
Clonidine	43	$212	$5
Haloperidol Decanoate	11	$166	$15
Guanfacine Hcl Er	18	$163	$9
Trazodone	31	$138	$4
Escitalopram	17	$117	$7
Hydroxyzine Pamoate	18	$105	$6
Buspirone	12	$59	$5

Year by year

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Part D prescribing by year

2024	730	35	0% (0)	7%	$24,720
2023	721	53	0% (0)	3%	$76,889
2022	1,097	86	0% (0)	10%	$327,052
2021	832	43	0% (0)	10%	$238,443
2020	861	71	0% (0)	11%	$250,740
2019	879	68	None	12%	$221,362
2018	340	52	0% (0)	13%	$86,146
2017	309	54	None	10%	$34,857
2016	2,384	120	0% (0)	11%	$317,979
2015	739	97	0% (0)	10%	$83,556

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

See the drugs prescribed each year

2023: 24 drugs

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Part D drugs prescribed in 2023

Aripiprazole	55	$11,835	$215
Divalproex Sodium Er	25	$3,039	$122
Olanzapine	49	$2,730	$56
Risperidone	85	$1,413	$17
Divalproex	43	$1,366	$32
Paliperidone Er	14	$1,322	$94
Guanfacine Hcl Er	16	$1,061	$66
Sertraline	56	$800	$14
Amantadine	20	$676	$34
Bupropion Xl	11	$577	$52
Haloperidol Decanoate	14	$441	$31
Propranolol	15	$433	$29
Clonazepam	16	$389	$24
Lithium Carbonate	55	$338	$6
Topiramate	16	$321	$20
Quetiapine	17	$321	$19
Trazodone	18	$293	$16
Clonidine	19	$262	$14
Fluoxetine	29	$243	$8
Escitalopram	21	$205	$10
Buspirone	18	$198	$11
Benztropine Mesylate	13	$136	$10
Valproic Acid	13	$133	$10
Hydroxyzine Pamoate	15	$114	$8

2022: 30 drugs

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Part D drugs prescribed in 2022

Invega Sustenna	49	$158,721	$3,239
Latuda	16	$34,700	$2,169
Aripiprazole	45	$8,780	$195
Divalproex Sodium Er	33	$5,466	$166
Olanzapine	71	$3,725	$52
Clomipramine	11	$3,636	$331
Olanzapine Odt	13	$2,655	$204
Haloperidol	28	$2,137	$76
Amantadine	36	$2,053	$57
Quetiapine	37	$1,950	$53
Divalproex	59	$1,947	$33
Clozapine	27	$1,596	$59
Paliperidone Er	12	$1,335	$111
Bupropion Xl	25	$1,189	$48
Gabapentin	23	$1,141	$50
Risperidone	65	$1,097	$17
Guanfacine Hcl Er	12	$1,065	$89
Haloperidol Decanoate	21	$986	$47
Sertraline	45	$728	$16
Trazodone	44	$655	$15
Benztropine Mesylate	29	$548	$19
Propranolol	24	$503	$21
Fluoxetine	64	$471	$7
Mirtazapine	15	$340	$23
Lithium Carbonate	56	$293	$5
Topiramate	23	$234	$10
Escitalopram	19	$197	$10
Hydroxyzine Pamoate	22	$182	$8
Buspirone	11	$87	$8
Lamotrigine	25	$74	$3

2021: 29 drugs

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Part D drugs prescribed in 2021

Invega Sustenna	47	$143,998	$3,064
Olanzapine Odt	14	$3,989	$285
Aripiprazole	29	$3,951	$136
Clomipramine	22	$3,886	$177
Quetiapine Fumarate Er	12	$3,062	$255
Haloperidol	39	$2,729	$70
Bupropion Xl	31	$1,890	$61
Divalproex Sodium Er	18	$1,693	$94
Paliperidone Er	12	$1,636	$136
Amantadine	23	$1,118	$49
Risperidone	75	$910	$12
Fluoxetine	89	$752	$8
Benztropine Mesylate	49	$682	$14
Buspirone	24	$647	$27
Divalproex	15	$620	$41
Quetiapine	18	$495	$27
Sertraline	37	$394	$11
Propranolol	13	$387	$30
Carbamazepine	15	$337	$22
Olanzapine	13	$260	$20
Haloperidol Decanoate	11	$259	$24
Gabapentin	19	$240	$13
Lithium Carbonate	27	$168	$6
Mirtazapine	12	$165	$14
Trazodone	13	$145	$11
Escitalopram	12	$95	$8
Hydroxyzine Pamoate	16	$86	$5
Clonidine	11	$80	$7
Lithium Carbonate Er	11	$31	$3

2020: 26 drugs

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Part D drugs prescribed in 2020

Invega Sustenna	67	$177,060	$2,643
Aripiprazole	19	$6,055	$319
Clomipramine	11	$3,482	$317
Haloperidol	49	$2,520	$51
Divalproex Sodium Er	35	$1,345	$38
Bupropion Xl	18	$981	$54
Carbamazepine	33	$916	$28
Quetiapine	43	$905	$21
Duloxetine	19	$752	$40
Fluoxetine	62	$743	$12
Divalproex	31	$716	$23
Risperidone	56	$691	$12
Benztropine Mesylate	52	$614	$12
Olanzapine	28	$390	$14
Haloperidol Decanoate	11	$372	$34
Propranolol	15	$269	$18
Gabapentin	24	$257	$11
Lorazepam	15	$208	$14
Trazodone	27	$171	$6
Venlafaxine Hcl Er	15	$165	$11
Hydroxyzine Pamoate	15	$155	$10
Lithium Carbonate	22	$149	$7
Buspirone	11	$141	$13
Sertraline	18	$133	$7
Mirtazapine	12	$124	$10
Escitalopram	12	$51	$4

2019: 23 drugs

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Part D drugs prescribed in 2019

Invega Sustenna	36	$83,025	$2,306
Olanzapine Odt	12	$5,422	$452
Perphenazine	25	$2,774	$111
Clozapine	21	$1,614	$77
Haloperidol	29	$1,485	$51
Divalproex Sodium Er	41	$1,475	$36
Risperidone	54	$1,157	$21
Bupropion Xl	25	$1,095	$44
Olanzapine	72	$1,054	$15
Divalproex	53	$1,001	$19
Carbamazepine	28	$823	$29
Venlafaxine Hcl Er	20	$613	$31
Benztropine Mesylate	48	$568	$12
Quetiapine	35	$514	$15
Fluoxetine	22	$470	$21
Lorazepam	23	$382	$17
Escitalopram	25	$283	$11
Lithium Carbonate	25	$207	$8
Sertraline	17	$188	$11
Trazodone	28	$169	$6
Gabapentin	22	$144	$7
Hydroxyzine Pamoate	12	$93	$8
Clonazepam	14	$89	$6

2018: 8 drugs

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Part D drugs prescribed in 2018

Latuda	13	$15,784	$1,214
Carbamazepine	14	$883	$63
Divalproex	21	$472	$22
Haloperidol	12	$422	$35
Fluoxetine	13	$390	$30
Risperidone	26	$320	$12
Lorazepam	17	$253	$15
Olanzapine	17	$211	$12

2017: 11 drugs

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Part D drugs prescribed in 2017

Risperidone Odt	12	$2,823	$235
Clozapine	12	$2,423	$202
Olanzapine	32	$788	$25
Carbamazepine	13	$687	$53
Venlafaxine Hcl Er	13	$459	$35
Lithium Carbonate Er	12	$306	$25
Benztropine Mesylate	20	$201	$10
Clonazepam	15	$130	$9
Lamotrigine	13	$85	$7
Gabapentin	11	$82	$7
Sertraline	12	$34	$3

2016: 46 drugs

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Part D drugs prescribed in 2016

Invega Sustenna	66	$115,479	$1,750
Latuda	43	$45,878	$1,067
Aripiprazole	63	$22,069	$350
Invega	11	$14,195	$1,290
Seroquel Xr	25	$12,946	$518
Clozapine	72	$12,346	$171
Olanzapine	206	$6,038	$29
Strattera	11	$5,779	$525
Thiothixene	25	$4,742	$190
Ziprasidone	53	$3,763	$71
Carbamazepine	89	$3,476	$39
Venlafaxine Hcl Er	23	$3,257	$142
Risperidone Odt	13	$3,198	$246
Divalproex Sodium Er	18	$3,091	$172
Fluoxetine	24	$2,944	$123
Quetiapine	92	$2,729	$30
Olanzapine Odt	25	$2,700	$108
Carbamazepine Er	23	$1,759	$76
Clonazepam	194	$1,577	$8
Gabapentin	130	$1,458	$11
Divalproex	62	$1,328	$21
Amantadine	12	$1,037	$86
Bupropion Xl	40	$970	$24
Haloperidol	39	$916	$23
Duloxetine	21	$888	$42
Lithium Carbonate Er	33	$853	$26
Benztropine Mesylate	75	$763	$10
Bupropion Hcl Sr	67	$633	$9
Risperidone	69	$600	$9
Buspirone	29	$593	$20
Mirtazapine	56	$558	$10
Propranolol	27	$537	$20
Hydroxyzine Pamoate	25	$495	$20
Trazodone	36	$463	$13
Lithium Carbonate	43	$388	$9
Escitalopram	65	$383	$6
Hydroxyzine	26	$370	$14
Bupropion	23	$337	$15
Lamotrigine	66	$307	$5
Paroxetine	44	$249	$6
Metoprolol	11	$222	$20
Sertraline	54	$193	$4
Lorazepam	35	$166	$5
Zolpidem	54	$141	$3
Citalopram Hbr	42	$99	$2
Alprazolam	11	$26	$2

2015: 25 drugs

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Part D drugs prescribed in 2015

Abilify	15	$13,974	$932
Latuda	11	$12,616	$1,147
Aripiprazole	12	$7,570	$631
Olanzapine	37	$2,427	$66
Clozapine	27	$2,214	$82
Carbamazepine	32	$1,450	$45
Quetiapine	23	$1,281	$56
Carbamazepine Er	12	$1,075	$90
Gabapentin	37	$798	$22
Clonazepam	77	$617	$8
Lithium Carbonate Er	20	$442	$22
Divalproex	19	$417	$22
Lithium Carbonate	26	$394	$15
Haloperidol	12	$385	$32
Buspirone	11	$338	$31
Escitalopram	17	$333	$20
Bupropion Hcl Sr	23	$288	$13
Benztropine Mesylate	23	$233	$10
Risperidone	19	$213	$11
Lamotrigine	24	$138	$6
Trazodone	14	$85	$6
Lorazepam	18	$74	$4
Zolpidem	18	$55	$3
Paroxetine	11	$47	$4
Citalopram Hbr	11	$27	$2

Money from drug and device companies

$79 in 2024

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Industry payments by year

2024	1	3	None	$79
2023	7	18	None	$437
2021	2	2	None	$36
2020	3	4	None	$79

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

Teva Pharmaceuticals USA	Austedo Xr	$79	3 payments Meals for Austedo Xr · 2024-03-22 · $24 Meals for Austedo Xr · 2024-02-02 · $29 Meals for Austedo Xr · 2024-01-20 · $26

See all 3 published payments

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Every published payment

Teva Pharmaceuticals USA	Meals · 2024-03-22	Austedo Xr	$24
Teva Pharmaceuticals USA	Meals · 2024-02-02	Austedo Xr	$29
Teva Pharmaceuticals USA	Meals · 2024-01-20	Austedo Xr	$26

See earlier years (2023, 2021, 2020)

2023: $437

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Payments by company in 2023

Alkermes	Aristada	$225	8 payments Meals for Aristada · 2023-11-04 · $28 Meals for Aristada · 2023-09-23 · $29 Meals for Aristada · 2023-08-25 · $26 Meals for Aristada · 2023-08-12 · $30 Meals for Aristada · 2023-05-20 · $30 Meals for Aristada · 2023-04-07 · $29 Meals for Aristada · 2023-03-11 · $30 Meals for Aristada · 2023-02-10 · $25
Teva Pharmaceuticals USA	Austedo Xr	$82	4 payments Meals for Austedo Xr · 2023-12-08 · $19 Meals for Austedo Xr · 2023-12-01 · $19 Meals for Austedo Xr · 2023-11-17 · $23 Meals for Austedo Xr · 2023-11-10 · $21
Otsuka America Pharmaceutical	Nuedexta	$38	2 payments Meals for Nuedexta · 2023-10-20 · $21 Meals for Nuedexta · 2023-03-25 · $17
Axsome Therapeutics	Auvelity	$28	1 payment Meals for Auvelity · 2023-06-16 · $28
Iti	Caplyta	$25	1 payment Meals for Caplyta · 2023-12-01 · $25
Takeda Pharmaceuticals U.S.A.	Trintellix	$21	1 payment Meals for Trintellix · 2023-12-15 · $21
Ironshore Pharmaceuticals	Jornay Pm	$19	1 payment Meals for Jornay Pm · 2023-11-17 · $19

2021: $36

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Payments by company in 2021

Supernus Pharmaceuticals	Qelbree	$22	1 payment Meals for Qelbree · 2021-05-20 · $22
Teva Pharmaceuticals USA	Austedo	$13	1 payment Meals for Austedo · 2021-03-06 · $13

2020: $79

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Payments by company in 2020

Teva Pharmaceuticals USA	Austedo	$35	2 payments Meals for Austedo · 2020-12-19 · $20 Meals for Austedo · 2020-07-11 · $15
Ironshore Pharmaceuticals	Jornay Pm	$24	1 payment Meals for Jornay Pm · 2020-01-08 · $24
Sunovion Pharmaceuticals	Latuda	$20	1 payment Meals for Latuda · 2020-05-16 · $20

Professional record

NPI: 1124105085
Licence: CA G32683California G32683: Current · expires 2027-06-30
Group: Thinh Duy Mai MD Apc · Hope Services
Video visits: Lists video visits
Gender: Male

More record details

Sole proprietor: No
Medicaid ID: CA 00G326830
Taxonomy: Federal specialty code 2084P0804X (2084P0804X)
Mailing address: 1503 Spring Hill Rd, Petaluma, CA, 94952
NPI first listed: 2006-10-31
NPI last updated: 2024-01-18
NPI record certified: 2024-01-18

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

Extra NPI addresses: 1597 Baker St, Costa Mesa, CA, 92626 · 250 Joann St, Costa Mesa, CA, 92626 · 537 W 8th St, San Pedro, CA, 90731 · 1691 Gramercy Ave, Torrance, CA, 90501