DR. PETER MAXWELL FERREN MD
NPI 1013947597
Psychiatry & Neurology - Psychiatry in San Francisco, CA
About Dr. Peter Maxwell Ferren Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. PETER MAXWELL FERREN MD (NPI 1013947597) is an individual psychiatry provider in San Francisco, California, licensed in California (A79672) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Peter Maxwell Ferren Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Peter Ferren reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: University Of California San Francisco
- 119 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 1,573 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 94110
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
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 Peter Ferren's NPI number?
The NPI number for Peter Ferren is 1013947597. It was assigned to this individual provider in the NPPES registry on July 3, 2006.
Where is Peter Ferren located?
Peter Ferren practices at 1001 Potrero Ave Rm 7M, San Francisco, CA 94110. The listed phone number is (415) 206-5612.
What is Peter Ferren's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Peter Ferren enrolled in Medicare?
Yes. Peter Ferren is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Peter Ferren's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Peter Ferren reassigns Medicare benefits to 4 organizations: University Of Califronia, San Francisco (San Francisco, CA), City & County Of San Francisco (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 Peter Ferren'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 Peter Ferren was last updated on December 22, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Dr. Peter Maxwell Ferren, MD · NPI 1013947597
Psychiatry physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since July 3, 2006.
## Identity
- **NPI:** 1013947597 (Entity type: Individual)
- **Enumerated:** July 3, 2006
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** A79672 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1001 POTRERO AVE, RM 7M, San Francisco, CA 94110-3518
- **Phone:** (415) 206-5612 · **Fax:** (415) 206-8942
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): University Of Califronia, San Francisco (NPI 1265638159, San Francisco, CA); City & County Of San Francisco (NPI 1083648810, 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
## Record status
- **NPPES last updated:** December 22, 2011
- **Other identifiers:** Medicare ID-Type Unspecified 00A796720 (CA); Medicare UPIN H81655
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Source: [NPI Profile](https://npiprofile.com/npi/1013947597) · Data from the CMS NPPES public registry.