JOHN R CHAMBERLAIN M.D.
NPI 1114036480
Psychiatry & Neurology - Forensic Psychiatry in San Francisco, CA
About John R Chamberlain M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN R CHAMBERLAIN M.D. (NPI 1114036480) is an individual forensic psychiatry provider in San Francisco, California, licensed in California (A065086) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (1995).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John R Chamberlain M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show John Chamberlain reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 761 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Chamberlain's NPI number?
The NPI number for John Chamberlain is 1114036480. It was assigned to this individual provider in the NPPES registry on August 30, 2006.
Where is John Chamberlain located?
John Chamberlain practices at 401 Parnassus Ave Box Adm, San Francisco, CA 94143. The listed phone number is (415) 476-7456.
What is John Chamberlain's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Forensic Psychiatry, with taxonomy code 2084F0202X.
Is John Chamberlain enrolled in Medicare?
Yes. John Chamberlain is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Chamberlain's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Chamberlain reassigns Medicare benefits to 3 organizations: Ucsf Dept Of Surgery (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Chamberlain's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Chamberlain was last updated on April 22, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John R Chamberlain, M.D. · NPI 1114036480
Forensic Psychiatry physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since August 30, 2006.
## Identity
- **NPI:** 1114036480 (Entity type: Individual)
- **Enumerated:** August 30, 2006
- **Primary specialty:** Psychiatry & Neurology - Forensic Psychiatry · taxonomy 2084F0202X
- **State license:** A065086 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 401 PARNASSUS AVE, BOX ADM, San Francisco, CA 94143-2211
- **Phone:** (415) 476-7456 · **Fax:** (415) 502-2206
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Ucsf Dept Of Surgery (NPI 1477627537, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Diego School Of Medicine, class of 1995
## Record status
- **NPPES last updated:** April 22, 2008
- **Other identifiers:** Medicare PIN 00A650860 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1114036480) · Data from the CMS NPPES public registry.