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Internal Medicine

Ahmed I. Garieballa, MD

Works at hospitals in Alameda, CA · Oakland, CA · California

Summary

Dr. Ahmed I. Garieballa, MD is an internal medicine doctor at 2070 Clinton Ave, Alameda, CA 94501. Phone: (510) 814-4397. Accepts Medicare assignment. In 2024, Ahmed I. Garieballa had 29 Original Medicare patients and 33 services. NPI 1255913950. 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: 2070 Clinton Ave, Alameda, CA 94501 · Directions
  • Phone: (510) 814‑4397
  • Medicare: Accepts Medicare assignment
  • Hospitals: Alameda Hospital, Highland Hospital
  • Group practice: Alameda Inpatient Medical Inc
  • Medical school: graduated 2018 (8 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Ahmed I. Garieballa, 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 Ahmed I. Garieballa accept Medicare assignment?
Yes. Medicare's clinician data says Ahmed I. Garieballa 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 Ahmed I. Garieballa see?
In 2024, CMS data shows 29 Original Medicare patients and 33 services for Ahmed I. Garieballa. This counts Original Medicare only and measures volume, not quality.
What is Ahmed I. Garieballa's NPI number?
1255913950. 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 Ahmed I. Garieballa, 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 patients29
Services billed to Medicare33
Different services or procedures8
Participating Medicare providerYes
Average age of these patients69

Most frequent services

  1. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)14 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 cholesterol59%
  • Diabetes38%
  • Ischemic heart disease38%
  • Depression38%
  • COPD38%

Hospitals where Ahmed I. Garieballa works

Medicare's Facility Affiliation Data lists Ahmed I. Garieballa 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.

  • Alameda HospitalAlameda, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050211
  • Highland HospitalOakland, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050320

Practice locations

Addresses where Ahmed I. Garieballa is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Ahmed I. Garieballa as a member of this group (CMS data updated October 2, 2026).

  • Alameda Inpatient Medical Inc22 clinicians in the group

Specialties

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Alameda

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

All internal medicine doctors in Alameda →

Other clinicians in Alameda Inpatient Medical Inc

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

Clinician information

CredentialMD
Graduation year2018 (8 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1255913950
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