Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Español Near me My list Help
US Patient GuideUSA
Surprise me
Cardiovascular Disease (Cardiology)

Gary B. Marcus, MD

Sees patients in Pinole, CA · California

Summary

Gary B. Marcus, MD (Cardiovascular Disease (Cardiology)) is enrolled with Medicare at 1 practice location in Pinole, CA. NPI 1073526646. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

Call(510) 640‑0019 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Gary B. Marcus, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

1Practice location
Cardiovascular Disease (Cardiology)Primary specialty
YesAccepts Medicare assignment
64Years since medical school (graduated 1962)
University Of Cincinnati College Of MedicineMedical school
MaleGender (as listed)

Quick answers

Where does Gary B. Marcus see patients?
Medicare's clinician data lists 1 practice location in Pinole, CA. Call before your visit to confirm the address.
What is Gary B. Marcus's specialty?
Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
Does Gary B. Marcus accept Medicare assignment?
Yes. Medicare's clinician data says Gary B. Marcus accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Gary B. Marcus?
(510) 640-0019, as listed in official Medicare / NPI Registry data.
What is Gary B. Marcus's NPI number?
1073526646. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Gary B. Marcus is enrolled with Medicare (CMS data updated 2026-10-02).

Specialties

Find other Cardiovascular Disease (Cardiology) doctors in California →

Other cardiologists in California

Clinicians with the same Medicare primary specialty in California — not a recommendation.

All cardiologists in California →

Clinician information

CredentialMD
Medical schoolUniversity Of Cincinnati College Of Medicine
Graduation year1962
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1073526646
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians