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Internal Medicine

Sarah Rikleen, MD

Works at hospitals in Greenbrae, CA · California

Summary

Dr. Sarah Rikleen, MD is an internal medicine doctor at 250 Bon Air Rd, Greenbrae, CA 94904. Phone: (415) 925-7000. Accepts Medicare assignment. In 2024, Sarah Rikleen had 198 Original Medicare patients and 416 services. NPI 1679008296. 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.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 250 Bon Air Rd, Greenbrae, CA 94904 · Directions
  • Phone: (415) 925‑7000
  • Medicare: Accepts Medicare assignment
  • Hospital: Marinhealth Medical Center
  • Group practice: Galen Inpatient Physicians PC
  • Medical school: graduated 2016 (10 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Sarah Rikleen, 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 Sarah Rikleen accept Medicare assignment?
Yes. Medicare's clinician data says Sarah Rikleen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Sarah Rikleen see?
In 2024, CMS data shows 198 Original Medicare patients and 416 services for Sarah Rikleen. This counts Original Medicare only and measures volume, not quality.
What is Sarah Rikleen's NPI number?
1679008296. 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 Sarah Rikleen, 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 patients198
Services billed to Medicare416
Different services or procedures8
Participating Medicare providerYes
Average age of these patients79

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)189 services
  2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)101 services
  3. Hospital discharge day management, more than 30 minutes (99239)54 services
  4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)53 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 blood pressure75%
  • High cholesterol75%
  • Arthritis59%
  • Depression44%
  • Anxiety43%
  • Ischemic heart disease41%

Hospitals where Sarah Rikleen works

Medicare's Facility Affiliation Data lists Sarah Rikleen 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

Practice locations

Addresses where Sarah Rikleen is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Sarah Rikleen as a member of this group (CMS data updated October 2, 2026).

  • Galen Inpatient Physicians PC1,077 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 year2016 (10 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1679008296
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