William Armstrong, D.O.
NPI 1770564411 · Diagnostic Radiology Physician · Meridian, MS
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Armstrong, D.O. is a Diagnostic Radiology Physician provider in Meridian, MS (NPI 1770564411).
Provider details
- NPI number
- 1770564411
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 13721 (MS)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,120 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 476 | $8 |
| Screening 3d Breast Mammography77063 | 414 | $26 |
| Screening Mammography77067 | 411 | $33 |
| Ct Scan Head Or Brain Without Contrast70450 | 141 | $36 |
| X-Ray of Chest, 2 Views71046 | 123 | $10 |
| Ultrasound of Hemodialysis Access93990 | 108 | $22 |
| Ct Scan of Chest With Contrast71260 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Clopidogrel Bisulfatebrand: Clopidogrel | 30 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$62 across 3 records (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
- 2005-11-09
- Last updated
- 2011-01-06
Frequently asked questions
- What is William Armstrong's NPI number?
- William Armstrong's National Provider Identifier (NPI) is 1770564411, 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 Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Armstrong located?
- William Armstrong's practice location on file with NPPES is 1203 24th Ave, Meridian, MS 39301-3926.
- What is William Armstrong's phone number?
- The practice phone number listed in the NPPES registry for William Armstrong is (601) 693-5862.
- 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 (1770564411) is active in the NPPES registry as of the last update on 2011-01-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.