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ROBERT MICHAEL ZIMBROFF MD
NPI 1659832087
Internal Medicine - Geriatric Medicine in Brisbane, CA

Active since March 28, 2019PECOS EnrolledAccepts Medicare Assignment
8000 MARINA BLVD STE 800, BRISBANE, CA 94005(415) 514-3577(415) 514-0702 Get Directions Write a Review

NPPES record last updated: May 4, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: May 4, 2026, Jul 21, 2022, Apr 2, 2019 (3 updates tracked since 2019).

About Robert Michael Zimbroff Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ROBERT MICHAEL ZIMBROFF MD (NPI 1659832087) is an individual geriatric medicine provider in Brisbane, California, licensed in California (A178787) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS and is a graduate of Icahn School Of Medicine At Mount Sinai (2019).

NPPES Registry Identity

NPI1659832087
Entity TypeIndividualMale
Primary Taxonomy207RG0300X
Provider Legal NameROBERT MICHAEL ZIMBROFFCredential: MD
Location Address8000 MARINA BLVD STE 800Brisbane, CA 94005-1875
Mailing Address8000 Marina Blvd Ste 800Brisbane, CA 94005-1875 · (415) 514-3577 · Fax (415) 514-0702
Phone(415) 514-3577
Fax(415) 514-0702
Sole ProprietorNo
Medical School CMSIcahn School Of Medicine At Mount SinaiGraduated 2019
Enumeration DateMarch 28, 2019
Last NPPES UpdateMay 4, 20263 updates tracked since enumeration
NPPES CertifiedMay 4, 2026
✔ NPI 1659832087 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RG0300X
License✔ Licensed in CA · A178787
Definition
An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.
8000 MARINA BLVD STE 800, Brisbane, CA 94005
Open in Google Maps ↗

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

Robert Michael Zimbroff Md 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.

PECOS PAC ID7214279447
PECOS Enrollment IDI20230803004296
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Robert Zimbroff reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Regents Of The University Of California
7.3 mi
Endocrinology, Diabetes & Metabolism
505 PARNASSUS AVE
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 2,112 clinicians in this Medicare group
NPI 1376613943 (415) 353-2350
University Of California San Francisco
7.4 mi
Surgery
400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 5,645 clinicians in this Medicare group
NPI 1346329380 (415) 353-2161
Ucsf Medical Group Business Services
7.4 mi
Internal Medicine
400 PARNASSUS AVE
San Francisco, CA 94122
  • Reassigned Medicare billing, California enrollment
  • 5,544 clinicians in this Medicare group
NPI 1477624104 (415) 353-2808

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 9

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.

Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes 99350
An established patient home visit is a service where a healthcare professional visits a patient's home for a check-up or treatment. The visit typically lasts for about an hour. This service is especially beneficial for patients who may have difficulty traveling to a healthcare facility.
184 services48 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
28 services28 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
27 services27 patients
Administration of pneumococcal, influenza, hepatitis b, and/or covid-19 vaccine inside a patient's home; reported only once per individual home per date of service when such vaccine administration(s) are performed at the patient's home M0201
The Covid-19 vaccine can be administered at your home for convenience and safety. This service is reported once per home, per date, when only the vaccine is given. It's a straightforward process where a medical professional visits your home to give the vaccine.
27 services27 patients
Telephone medical discussion with physician, 21-30 minutes 99443
This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.
23 services14 patients
Residence visit for new patient with high level of medical decision making, per day, if using time, at least 75 minutes 99345
A new patient home visit is a comprehensive 75-minute appointment conducted at your home. The healthcare professional will assess your health, discuss any concerns, and create a personalized care plan. It's convenient, comfortable, and tailored to your specific needs.
20 services20 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94005 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

VIVIAN HUI
Social Worker
8000 MARINA BLVD STE 800
BRISBANE, CA 94005
San Mateo County (415) 502-3322

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 Zimbroff's NPI number?

The NPI number for Robert Zimbroff is 1659832087. It was assigned to this individual provider in the NPPES registry on March 28, 2019.

Where is Robert Zimbroff located?

Robert Zimbroff practices at 8000 Marina Blvd Ste 800, Brisbane, CA 94005. The listed phone number is (415) 514-3577.

What is Robert Zimbroff's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.

Is Robert Zimbroff enrolled in Medicare?

Yes. Robert Zimbroff 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 Robert Zimbroff's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Zimbroff reassigns Medicare benefits to 3 organizations: Regents Of The University Of California (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 Robert Zimbroff'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 Robert Zimbroff was last updated on May 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.