ROBERT ANDREW ZIMMERMAN MD
NPI 1275612301
Emergency Medicine in South San Francisco, CA
About Robert Andrew Zimmerman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROBERT ANDREW ZIMMERMAN MD (NPI 1275612301) is an individual emergency medicine provider in South San Francisco, California, licensed in California (C42900) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Robert Andrew Zimmerman Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
8Medicare enrollment records show Robert Zimmerman reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Daly City, CA 94015
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
San Francisco, CA 94116
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Sonoma, CA 95476
- Reassigned Medicare billing, California enrollment
- 112 clinicians in this Medicare group
Napa, CA 94558
- Reassigned Medicare billing, California enrollment
- 53 clinicians in this Medicare group
Mount Shasta, CA 96067
- Reassigned Medicare billing, California enrollment
- 61 clinicians in this Medicare group
Omaha, NE 68154
- Reassigned Medicare billing, Nebraska enrollment
- 1,045 clinicians in this Medicare group
Kailua, HI 96734
- Reassigned Medicare billing, Hawaii enrollment
- 206 clinicians in this Medicare group
Honolulu, HI 96819
- Reassigned Medicare billing, Hawaii enrollment
- 1,187 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 5
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94080 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
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 Robert Zimmerman's NPI number?
The NPI number for Robert Zimmerman is 1275612301. It was assigned to this individual provider in the NPPES registry on November 2, 2006.
Where is Robert Zimmerman located?
Robert Zimmerman practices at 1200 El Camino Real, South San Francisco, CA 94080. The listed phone number is (650) 742-2000.
What is Robert Zimmerman's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Robert Zimmerman enrolled in Medicare?
Yes. Robert Zimmerman is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Robert Zimmerman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Zimmerman reassigns Medicare benefits to 8 organizations: Cep America - California (Daly City, CA), Permanente Medical Group Inc (San Francisco, CA), Sonoma Valley Emergency Physicians Medical Group, Inc (Sonoma, CA), Napa Valley Emergency Medical Group (Napa, CA), Mount Eddy Emergency Physicians Medical Group, Inc. (Mount Shasta, CA) and 3 more organizations, listed in the Medicare section above. 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 Robert Zimmerman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Robert Zimmerman accept?
Health plans from Blue Cross and Blue Shield of Nebraska, Medica and Oscar Insurance Company list Robert Zimmerman as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Robert Zimmerman was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Robert Andrew Zimmerman, MD · NPI 1275612301
Emergency Medicine physician in South San Francisco, California. Individual provider, active in the CMS NPPES registry since November 2, 2006.
## Identity
- **NPI:** 1275612301 (Entity type: Individual)
- **Enumerated:** November 2, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** C42900 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1200 EL CAMINO REAL, South San Francisco, CA 94080-3208
- **Phone:** (650) 742-2000
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Cep America - California (NPI 1922053438, Daly City, CA); Permanente Medical Group Inc (NPI 1841373800, San Francisco, CA); Sonoma Valley Emergency Physicians Medical Group, Inc (NPI 1710164629, Sonoma, CA); Napa Valley Emergency Medical Group (NPI 1467463539, Napa, CA); Mount Eddy Emergency Physicians Medical Group, Inc. (NPI 1316299787, Mount Shasta, CA); and 3 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicaid 00C429000 (CA); Medicare UPIN B30525; Medicare ID-Type Unspecified 00C429000
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Source: [NPI Profile](https://npiprofile.com/npi/1275612301) · Data from the CMS NPPES public registry.