Dr. John R. Chamberlain, M.D.
Psychiatry (Forensic Psychiatry Physician)
- Medicare participating
At a glance
- Medical school
- University of California, San Diego School of Medicine (1995)
- Years since graduation
- 31
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 165
Licensed in California since 1998, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1995Medical school: University of California, San Diego School of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Forensic Psychiatry Physician primary
CA license A065086 (first issued 1998; current) -
Psychiatry Physician
CA license A065086 (first issued 1998; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- UCSF Medical Center San Francisco, CA
Medical groups
- University of California San Francisco (1,839 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 165
- Services billed
- 746
- Patients’ average age
- 67
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 712 | 275 |
| Psychotherapy with evaluation and management visit, 30 minutes | 120 | 25 |
| Established patient office or other outpatient visit, 20-29 minutes | 32 | 18 |
| Psychiatric diagnostic evaluation with medical services | 17 | 17 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Mirtazapine Other prescribers in San Francisco, CA | 14 |
| Diazepam Other prescribers in San Francisco, CA | 13 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.