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

Internal Medicine

Mary Rose L. Fabi, MD

Works at hospitals in Greenbrae, CA · Novato, CA · San Francisco, CA · California

Summary

Dr. Mary Rose L. Fabi, MD is an internal medicine doctor at 250 Bon Air Rd, Greenbrae, CA 94904. Phone: (415) 925-7000. May accept Medicare assignment. In 2024, Mary Rose L. Fabi had 689 Original Medicare patients and 2,455 services. NPI 1740489798. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Mary Rose L. Fabi, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Mary Rose L. Fabi accept Medicare assignment?
Medicare's clinician data says Mary Rose L. Fabi may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
How many Medicare patients does Mary Rose L. Fabi see?
In 2024, CMS data shows 689 Original Medicare patients and 2,455 services for Mary Rose L. Fabi. This counts Original Medicare only and measures volume, not quality.
What is Mary Rose L. Fabi's NPI number?
1740489798. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Mary Rose L. Fabi, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients689
Services billed to Medicare2,455
Different services or procedures30
Participating Medicare providerYes
Average age of these patients77

Most frequent services

  1. Telephone medical discussion with physician, 11-20 minutes (99442)542 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)535 services
  3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)418 services
  4. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)219 services
  5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)217 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • High blood pressure63%
  • Arthritis49%
  • Anxiety31%
  • Ischemic heart disease29%
  • Depression28%

Hospitals where Mary Rose L. Fabi works

Medicare's Facility Affiliation Data lists Mary Rose L. Fabi at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Marinhealth Medical CenterGreenbrae, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050360
  • Novato Community HospitalNovato, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050131
  • UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050454

Practice locations

Addresses where Mary Rose L. Fabi is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Mary Rose L. Fabi as a member of these groups (CMS data updated October 2, 2026).

  • Galen Inpatient Physicians PC1,077 clinicians in the group
  • Regents Univ of California UCSF283 clinicians in the group

Specialties

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Greenbrae

Clinicians with the same Medicare primary specialty in Greenbrae, CA — not a recommendation.

All internal medicine doctors in Greenbrae →

Other clinicians in Galen Inpatient Physicians PC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Graduation year2001 (25 years since medical school)
Gender (as listed)Female
Medicare assignmentMay accept for some services
TelehealthOffers telehealth services
NPI (National Provider Identifier)1740489798
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. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians