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Hospitalist

Sinziana Mahalean, MD

Works at hospitals in Falls Church, VA · Virginia

Summary

Dr. Sinziana Mahalean, MD is a hospitalist at 3300 Gallows Rd, Falls Church, VA 22042. Phone: (703) 771-2960. Accepts Medicare assignment. In 2024, Sinziana Mahalean had 247 Original Medicare patients and 656 services. NPI 1366839045. 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: Hospitalist
  • Address: 3300 Gallows Rd, Falls Church, VA 22042 · Directions (1 more location)
  • Phone: (703) 771‑2960
  • Medicare: Accepts Medicare assignment
  • Hospital: Inova Fairfax Hospital
  • Group practice: Inova Health Care Services
  • Medical school: graduated 2015 (11 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Sinziana Mahalean, 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 Sinziana Mahalean accept Medicare assignment?
Yes. Medicare's clinician data says Sinziana Mahalean 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 Sinziana Mahalean see?
In 2024, CMS data shows 247 Original Medicare patients and 656 services for Sinziana Mahalean. This counts Original Medicare only and measures volume, not quality.
What is Sinziana Mahalean's NPI number?
1366839045. 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 Sinziana Mahalean, 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 patients247
Services billed to Medicare656
Different services or procedures5
Participating Medicare providerYes
Average age of these patients78

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)328 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)182 services
  3. Hospital discharge day management, more than 30 minutes (99239)93 services
  4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)45 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%
  • Heart failure64%
  • Ischemic heart disease63%
  • Chronic kidney disease60%
  • Arthritis57%

Hospitals where Sinziana Mahalean works

Medicare's Facility Affiliation Data lists Sinziana Mahalean 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 Sinziana Mahalean is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

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

  • Inova Health Care Services1,817 clinicians in the group

Specialties

Find other Hospitalist doctors in Virginia →

Other hospitalists in Falls Church

Clinicians with the same Medicare primary specialty in Falls Church, VA — not a recommendation.

All hospitalists in Falls Church →

Other clinicians in Inova Health Care Services

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

Clinician information

CredentialMD
Graduation year2015 (11 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1366839045
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