Doctor profile · Federal record
Dr. Stephen Williams, M.D.
Psychiatry Physician (CMS: Psychiatry) · Psychiatry Physician · Santa Rosa, CA
- NPI 1184778284
- Accepts Medicare
- 32 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
480 Tesconi Cir Ste B
Santa Rosa, CA 954014691
(707) 206-7268
fax (707) 206-7254
Credentials & registration
- NPI registered
- January 2007 — 19 yrs on file
- Profile last updated
- July 9, 2021
- Year of graduation
- 1994 — 32 yrs since
- Specialty taxonomy
- 2084P0800X — NUCC code
- State licenses (2)
- California #A55291 · Ohio #35.129375
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1184778284. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
146
Distinct HCPCS
5
Medicare allowed
$12,526
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 53 | 31 | $83 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 29 | 21 | $115 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 29 | 11 | $48 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 21 | 13 | $76 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 14 | 14 | $126 |
In context: peer comparison
Among 7 peers in this city , average services per provider: 139. This provider delivers 1.1× the peer median.Open Payments
Industry payments received
All-time total
$112
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| E.R. Squibb & Sons, L.L.C. | 1 | $112.42 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
561
Patients
100
Total drug cost
$13,350
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Quetiapine Fumarate | Generic | 99 | 25 | $2,364 |
| Lamotrigine | Generic | 69 | 19 | $995 |
| Buspirone Hcl | Generic | 64 | 15 | $1,209 |
| Mirtazapine | Generic | 52 | 14 | $1,027 |
| Bupropion Xl (Bupropion Hcl) | Brand | 38 | 0 | $1,160 |
| Venlafaxine Hcl Er (Venlafaxine Hcl) | Brand | 33 | 0 | $979 |
| Clonazepam | Generic | 31 | 0 | $157 |
| Fluoxetine Hcl | Generic | 31 | 15 | $264 |
| Duloxetine Hcl | Generic | 28 | 12 | $1,225 |
| Aripiprazole | Generic | 23 | 0 | $1,242 |
Frequently asked questions
What is Dr. Stephen Williams's medical specialty?
Dr. Stephen Williams practices Psychiatry Physician in Santa Rosa, CA.
Where does Dr. Stephen Williams practice?
Dr. Stephen Williams practices at 480 Tesconi Cir Ste B, Santa Rosa, CA 954014691. Office phone: 7072067268.
What is Dr. Stephen Williams's NPI?
Dr. Stephen Williams's National Provider Identifier (NPI) is 1184778284, issued by NPPES.
Does Dr. Stephen Williams accept Medicare assignment?
Yes. Dr. Stephen Williams accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Stephen Williams commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231). Source: CMS Medicare Physician & Other Practitioners file.