Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Diagnostic Radiology

Marilyn Barry Brooks, MD

Works at hospitals in Fairfax, VA · Virginia

Summary

Dr. Marilyn Barry Brooks, MD is a radiologist at 100 Elden St, Suite 16, Herndon, VA 20170. Phone: (703) 698-4488. Accepts Medicare assignment. In 2024, Marilyn Barry Brooks had 1,377 Original Medicare patients and 3,191 services. NPI 1538395827. 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: Radiologist (Medicare lists Diagnostic Radiology)
  • Address: 100 Elden St, Suite 16, Herndon, VA 20170 · Directions (16 more locations)
  • Phone: (703) 698‑4488
  • Medicare: Accepts Medicare assignment
  • Hospital: Inova Fair Oaks Hospital
  • Group practice: Fairfax Radiological Consultants (+2 more)
  • Medical school: Tufts University School Of Medicine · graduated 2009 (17 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Marilyn Barry Brooks, 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 Marilyn Barry Brooks accept Medicare assignment?
Yes. Medicare's clinician data says Marilyn Barry Brooks 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 Marilyn Barry Brooks see?
In 2024, CMS data shows 1,377 Original Medicare patients and 3,191 services for Marilyn Barry Brooks. This counts Original Medicare only and measures volume, not quality.
What is Marilyn Barry Brooks's NPI number?
1538395827. 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 Marilyn Barry Brooks, 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 patients1,377
Services billed to Medicare3,191
Different services or procedures18
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Screening mammography (77067)770 services
  2. Screening 3d breast mammography (77063)714 services
  3. Dxa bone density measurement of hip, pelvis, spine (77080)342 services
  4. Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) (G0279)310 services
  5. Diagnostic mammography of both breasts (77066)247 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%
  • High blood pressure62%
  • Arthritis47%
  • Osteoporosis31%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)25%
  • Anxiety19%

Hospitals where Marilyn Barry Brooks works

Medicare's Facility Affiliation Data lists Marilyn Barry Brooks 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.

  • Inova Fair Oaks HospitalFairfax, VA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 490101

Practice locations

Addresses where Marilyn Barry Brooks is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 17; the Medicare profile lists all.

Group practices

Medicare enrollment lists Marilyn Barry Brooks as a member of these groups (CMS data updated October 2, 2026).

  • Fairfax Radiological Consultants154 clinicians in the group
  • Ifrc LLC137 clinicians in the group
  • Inova Reston Mri Center LLC106 clinicians in the group

Specialties

Find other Diagnostic Radiology doctors in Virginia →

Other radiologists in Herndon

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

All radiologists in Herndon →

Other clinicians in Fairfax Radiological Consultants

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

Clinician information

CredentialMD
Medical schoolTufts University School Of Medicine
Graduation year2009 (17 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1538395827
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