Quick answers
- Does Brigid A. Castro accept Medicare assignment?
- Yes. Medicare's clinician data says Brigid A. Castro 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 Brigid A. Castro see?
- In 2024, CMS data shows 4,227 Original Medicare patients and 7,101 services for Brigid A. Castro. This counts Original Medicare only and measures volume, not quality.
- What is Brigid A. Castro's NPI number?
- 1750311130. 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 Brigid A. Castro, 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 patients | 4,227 |
|---|---|
| Services billed to Medicare | 7,101 |
| Different services or procedures | 82 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- X-ray of chest, 1 view (71045)2,818 services
- X-ray of chest, 2 views (71046)563 services
- X-ray of abdomen, 1 view (74018)546 services
- Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries (A9552)378 services
- Nuclear medicine study of bone and/or joint whole body (78306)305 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%
- Arthritis52%
- Ischemic heart disease45%
- Chronic kidney disease39%
- Heart failure38%
Hospitals where Brigid A. Castro works
Medicare's Facility Affiliation Data lists Brigid A. Castro 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 Alexandria HospitalAlexandria, VA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 490040
- Inova Fair Oaks HospitalFairfax, VA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 490101
- Inova Fairfax HospitalFalls Church, VA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 490063
- Inova Loudoun HospitalLeesburg, VA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 490043
- Inova Mount Vernon HospitalAlexandria, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490122
Practice locations
Addresses where Brigid A. Castro is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 23; the Medicare profile lists all.
- 100 Elden St, Suite 16Herndon, VA 20170 (703) 698‑4488
- 11335 Pembrooke SqWaldorf, MD 20603 (703) 698‑4488
- 1600 N Beauregard St, Suite 200Alexandria, VA 22311 (703) 698‑4444
- 19455 Deerfield Ave, Suite 102Leesburg, VA 20176 (703) 698‑4488
- 230 W Dares Beach Rd, Suite 100 Fairfax Radiology Center at PatuxPrince Frederick, MD 20678 (703) 698‑4488
Group practices
Medicare enrollment lists Brigid A. Castro 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
- Diagnostic Radiologyprimary
- Nuclear Medicinealso
Other radiologists in Herndon
Clinicians with the same Medicare primary specialty in Herndon, VA — not a recommendation.
Other clinicians in Fairfax Radiological Consultants
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1750311130 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians