NPPES file of Aug 9, 2026

Robert Michael Zimbroff, MD

Geriatric Medicine (Internal Medicine) Physician · Brisbane, CA

Robert Michael Zimbroff, MD is a geriatric medicine (internal medicine) physician with a practice address in Brisbane, California, and NPI 1659832087, issued on Mar 28, 2019. Check the license (California A178787, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1659832087
Name
Robert Michael Zimbroff
Credential
MD
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
A178787 CA
Self-reported in NPPES; status is on the state search
Practice location
8000 Marina Blvd Ste 800, Brisbane, CA 94005
Phone
(415) 514-3577
Enumerated
Mar 28, 2019
Record last updated
May 4, 2026
Fax
(415) 514-0702
Medicare enrollment
Enrolled (PECOS I20230803004296); accepts Medicare assignment
Medical or professional school
Icahn School Of Medicine At Mount Sinai, 2019
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

Also registered at 8000 Marina Blvd Ste 800

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Vivian HuiSocial Worker1215286786

Verify Robert Michael Zimbroff in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A178787    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

84% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

685 Medicare Part D claims for 70 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. 38 claims were for opioids.

  1. Robert Zimbroff685
  2. Specialty average4,246

Most prescribed

  1. Amlodipine Besylate47 claims
  2. Rosuvastatin Calcium26 claims
  3. Atorvastatin Calcium23 claims
  4. Gabapentin21 claims
  5. Levothyroxine Sodium18 claims
  6. Oxycodone Hcl17 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. Regents OF The University OF CaliforniaSan Francisco, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

2 geriatric medicine (internal medicine) physician records list a practice address in Brisbane

They are 2 of the 37 NPPES records with a practice address in Brisbane, and 532 geriatric medicine (internal medicine) physician records in California.

All 2 in Brisbane → All 532 in California → Every provider in Brisbane →

Other geriatric medicine (internal medicine) physician records in California

  1. Adil Abbasi, M.D.La Jolla, CA1548261316
  2. Shashidar Acharya, M.D.Orange, CA1770685521
  3. Marie AdachiLos Angeles, CA1629496740
  4. Pouya Afshar, M.D.San Diego, CA1184958977
  5. Parag Agnihotri, M.D.San Diego, CA1447351085
  6. Andreas Ahlas, M.D.Bakersfield, CA1326200833
  7. Waseem Ahmed, MDSanta Rosa, CA1386803559
  8. Paul AisenSan Diego, CA1669470753
  9. Mahmuda Alam, M.D.Glendale, CA1568659985
  10. Cathy Alessi, M.D.North Hills, CA1134224983

Common questions

What is Robert Michael Zimbroff, MD's NPI number?

Robert Michael Zimbroff, MD's National Provider Identifier (NPI) is 1659832087, issued on Mar 28, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Robert Michael Zimbroff, MD located?

The NPPES record lists a practice address at 8000 Marina Blvd Ste 800, Brisbane, CA, 94005. Phone: (415) 514-3577. Providers update this record themselves, so call before visiting.

How can I verify Robert Michael Zimbroff, MD's license?

NPPES lists California license number A178787, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Robert Michael Zimbroff, MD prescribe under Medicare Part D?

In 2024, Robert Michael Zimbroff, MD had 685 Medicare Part D claims for 70 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.