Quick answers
- Does Hasan A. Ahmad accept Medicare assignment?
- Yes. Medicare's clinician data says Hasan A. Ahmad 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 Hasan A. Ahmad see?
- In 2024, CMS data shows 340 Original Medicare patients and 965 services for Hasan A. Ahmad. This counts Original Medicare only and measures volume, not quality.
- What is Hasan A. Ahmad's NPI number?
- 1255478517. 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 Hasan A. Ahmad, 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 | 340 |
|---|---|
| Services billed to Medicare | 965 |
| Different services or procedures | 61 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)147 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)123 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)86 services
- Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician (93016)59 services
- Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)59 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%
- Ischemic heart disease75%
- Diabetes49%
- Heart failure49%
- Arthritis47%
Hospitals where Hasan A. Ahmad works
Medicare's Facility Affiliation Data lists Hasan A. Ahmad 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.
- Sentara Leigh HospitalNorfolk, VA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 490046
- Westchester Medical CenterValhalla, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330234
Practice locations
Addresses where Hasan A. Ahmad is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Woods RdValhalla, NY 10595
- 301 Riverview Ave, Suite 700Norfolk, VA 23510 (757) 252‑9365
- 95 Grasslands RdValhalla, NY 10595 (914) 493‑6940
Group practices
Medicare enrollment lists Hasan A. Ahmad as a member of these groups (CMS data updated October 2, 2026).
- Sentara Medical Group1,408 clinicians in the group
- Westchester Medical Center Advanced Physician Services PC897 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in Valhalla
Clinicians with the same Medicare primary specialty in Valhalla, NY — not a recommendation.
Other clinicians in Sentara Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At San Antonio |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255478517 |
| 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