Doctor profile · Federal record
Dr. John Chamberlain, M.D.
Forensic Psychiatry Physician (CMS: Psychiatry) · Psychiatry Physician · San Francisco, CA
- NPI 1114036480
- Accepts Medicare
- MIPS 70.8 / 100 · 2023
- 31 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
401 Parnassus Ave, Box ADM
San Francisco, CA 941432211
(415) 476-7456
fax (415) 502-2206
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- April 22, 2008
- Year of graduation
- 1995 — 31 yrs since
- Specialty taxonomy
- 2084F0202X — NUCC code
- State license (1)
- California #A065086
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1114036480. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
881
Distinct HCPCS
4
Medicare allowed
$91,088
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 712 | 275 | $109 | |
90833 |
Psychotherapy with evaluation and management visit, 30 minutes | 120 | 25 | $67 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 32 | 18 | $74 | |
90792 |
Psychiatric diagnostic evaluation with medical services | 17 | 17 | $187 |
In context: peer comparison
Among 1 peers in San Francisco Forensic Psychiatry Physician, average services per provider: 220. This provider delivers 4.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
30
Patients
0
Total drug cost
$636
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Duloxetine Hcl | Generic | 16 | 0 | $448 |
| Mirtazapine | Generic | 14 | 0 | $188 |
Hospital affiliations
Frequently asked questions
What is Dr. John Chamberlain's medical specialty?
Dr. John Chamberlain practices Forensic Psychiatry Physician in San Francisco, CA.
Where does Dr. John Chamberlain practice?
Dr. John Chamberlain practices at 401 Parnassus Ave, San Francisco, CA 941432211. Office phone: 4154767456.
What is Dr. John Chamberlain's NPI?
Dr. John Chamberlain's National Provider Identifier (NPI) is 1114036480, issued by NPPES.
Does Dr. John Chamberlain accept Medicare assignment?
Yes. Dr. John Chamberlain accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Chamberlain commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Psychotherapy with evaluation and management visit (HCPCS 90833); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.