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Hematology/Oncology

Fiona Mienko, MD

Works at hospitals in Woodbridge, VA · Virginia

Summary

Dr. Fiona Mienko, MD is a hematologist-oncologist at 2280 Opitz Blvd, Suite 340, Woodbridge, VA 22191. Phone: (703) 590-8300. Accepts Medicare assignment. In 2024, Fiona Mienko had 327 Original Medicare patients and 55,995 services. NPI 1023495066. 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: Hematologist-oncologist (Medicare lists Hematology/Oncology)
  • Address: 2280 Opitz Blvd, Suite 340, Woodbridge, VA 22191 · Directions
  • Phone: (703) 590‑8300
  • Medicare: Accepts Medicare assignment
  • Hospital: Sentara Northern Virginia Medical Center
  • Group practice: American Oncology Partners PA
  • Medical school: graduated 2012 (14 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Fiona Mienko, 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 Fiona Mienko accept Medicare assignment?
Yes. Medicare's clinician data says Fiona Mienko 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 Fiona Mienko see?
In 2024, CMS data shows 327 Original Medicare patients and 55,995 services for Fiona Mienko. This counts Original Medicare only and measures volume, not quality.
What is Fiona Mienko's NPI number?
1023495066. 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 Fiona Mienko, 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 patients327
Services billed to Medicare55,995
Different services or procedures88
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Injection, ferric derisomaltose, 10 mg (J1437)2,500 services
  2. Injection, dexamethasone sodium phosphate, 1 mg (J1100)1,170 services
  3. Injection, palonosetron hcl, 25 mcg (J2469)720 services
  4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)606 services
  5. Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)432 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%
  • Diabetes47%
  • Arthritis47%
  • Ischemic heart disease46%
  • Chronic kidney disease42%

Hospitals where Fiona Mienko works

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

Group practices

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

  • American Oncology Partners PA391 clinicians in the group

Specialties

Find other Hematology/Oncology doctors in Virginia →

Other hematologist-oncologists in Woodbridge

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

All hematologist-oncologists in Woodbridge →

Other clinicians in American Oncology Partners PA

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

Clinician information

CredentialMD
Graduation year2012 (14 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1023495066
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