William Armstrong, MD
NPI 1487739553 · Cardiovascular Disease Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Armstrong, MD is a Cardiovascular Disease Physician provider in Ann Arbor, MI (NPI 1487739553).
Provider details
- NPI number
- 1487739553
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301055513 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,100 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 260 | $67 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 158 | $66 |
| 3d Radiographic Procedure With Computerized Image Postprocessing76377 | 111 | $38 |
| 3d Radiographic Procedure With Computerized Image Postprocessing76377 | 107 | $37 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 85 | $97 |
| Heart Muscle Strain Imaging93356 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 176 | 44 |
| Atorvastatin Calcium | 142 | 51 |
| Metoprolol Succinate | 130 | 50 |
| Lisinopril | 91 | 32 |
| Metoprolol Tartrate | 84 | 24 |
| Furosemide | 65 | 26 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-26
- Last updated
- 2020-02-06
- Certified
- 2020-02-06
Frequently asked questions
- What is William Armstrong's NPI number?
- William Armstrong's National Provider Identifier (NPI) is 1487739553, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Armstrong's specialty?
- William Armstrong is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Armstrong located?
- William Armstrong's practice location on file with NPPES is 325 Briarwood Circle, Ann Arbor, MI 48108-1605.
- What is William Armstrong's phone number?
- The practice phone number listed in the NPPES registry for William Armstrong is (734) 647-9000.
- Does William Armstrong accept Medicare?
- William Armstrong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Armstrong's NPI active?
- Yes — William Armstrong's NPI (1487739553) is active in the NPPES registry as of the last update on 2020-02-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.