Quick answers
- Does Felix D. Castro accept Medicare assignment?
- Yes. Medicare's clinician data says Felix D. 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 Felix D. Castro see?
- In 2024, CMS data shows 2,134 Original Medicare patients and 3,530 services for Felix D. Castro. This counts Original Medicare only and measures volume, not quality.
- What is Felix D. Castro's NPI number?
- 1518979160. 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 Felix D. 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 | 2,134 |
|---|---|
| Services billed to Medicare | 3,530 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)1,374 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)497 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)400 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)373 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)137 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%
- Arthritis53%
- Ischemic heart disease53%
- Heart failure44%
- Atrial fibrillation43%
Hospitals where Felix D. Castro works
Medicare's Facility Affiliation Data lists Felix D. 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 Mount Vernon HospitalAlexandria, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490122
- Virginia Hospital CenterArlington, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490050
Practice locations
Addresses where Felix D. Castro is enrolled with Medicare (CMS data updated October 2, 2026).
- 3300 Gallows RdFalls Church, VA 22042
- 3833 Fairfax DrArlington, VA 22203
- 7619 Little River Tpke, Suite 1000Annandale, VA 22003 (703) 256‑5680
- 8081 Innovation Park DrFairfax, VA 22031
- 8221 Willow Oaks Corporate DrFairfax, VA 22031 (703) 237‑3446
Group practices
Medicare enrollment lists Felix D. Castro as a member of this group (CMS data updated October 2, 2026).
- Inova Health Care Services1,817 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Virginia →
Other cardiologists in Falls Church
Clinicians with the same Medicare primary specialty in Falls Church, VA — not a recommendation.
Other clinicians in Inova Health Care Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1987 (39 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1518979160 |
| 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