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Emergency Medicine

Nadine Aldahhan, DO

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

Summary

Dr. Nadine Aldahhan, DO is an emergency medicine doctor at 3883 Airway Dr, Suite 120, Santa Rosa, CA 95403. Phone: (707) 521-4495. Accepts Medicare assignment. In 2024, Nadine Aldahhan had 391 Original Medicare patients and 1,053 services. NPI 1609202308. 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 Nadine Aldahhan, 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 Nadine Aldahhan accept Medicare assignment?
Yes. Medicare's clinician data says Nadine Aldahhan 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 Nadine Aldahhan see?
In 2024, CMS data shows 391 Original Medicare patients and 1,053 services for Nadine Aldahhan. This counts Original Medicare only and measures volume, not quality.
What is Nadine Aldahhan's NPI number?
1609202308. 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 Nadine Aldahhan, 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 patients391
Services billed to Medicare1,053
Different services or procedures43
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)398 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)154 services
  3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)113 services
  4. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)72 services
  5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)65 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%
  • Osteoporosis61%
  • High blood pressure54%
  • Arthritis41%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)19%
  • Depression18%

Hospitals where Nadine Aldahhan works

Medicare's Facility Affiliation Data lists Nadine Aldahhan 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.

Practice locations

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

Group practices

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

  • Sutter Bay Medical Foundation3,829 clinicians in the group

Specialties

Find other Emergency Medicine doctors in California →

Other emergency medicine doctors in Santa Rosa

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

All emergency medicine doctors in Santa Rosa →

Other clinicians in Sutter Bay Medical Foundation

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

Clinician information

CredentialDO
Medical schoolUniversity Of North Texas Hsc, College Of Osteopathic Med
Graduation year2013 (13 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1609202308
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