William Armstrong, MD
NPI 1902225014 · Cardiovascular Disease Physician · Chattanooga, TN
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 Chattanooga, TN (NPI 1902225014).
Provider details
- NPI number
- 1902225014
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,076 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 648 | $64 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 326 | $117 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 322 | $13 |
| Exercise Or Drug-Induced Heart Stress Test With Electrocardiogram (ecg) With Review By Physician93018 | 255 | $13 |
| Nuclear Medicine Studies of Heart Muscle at Rest and With Stress and Spect78452 | 202 | $70 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 49 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 382 | 123 |
| Apixabanbrand: Eliquis | 371 | 102 |
| Amlodipine Besylate | 371 | 127 |
| Carvedilol | 332 | 104 |
| Metoprolol Tartrate | 296 | 121 |
| Metoprolol Succinate | 269 | 92 |
| Rosuvastatin Calcium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$27 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-04-16
- Last updated
- 2020-05-26
- Certified
- 2020-05-26
Frequently asked questions
- What is William Armstrong's NPI number?
- William Armstrong's National Provider Identifier (NPI) is 1902225014, 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 2501 Citico Ave, Chattanooga, TN 37404-1127.
- What is William Armstrong's phone number?
- The practice phone number listed in the NPPES registry for William Armstrong is (423) 697-2000.
- 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 (1902225014) is active in the NPPES registry as of the last update on 2020-05-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.