Malcolm Williamson, MD
NPI 1144218991 · Diagnostic Radiology Physician · Ocala, FL
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Malcolm Williamson, MD is a Diagnostic Radiology Physician provider in Ocala, FL (NPI 1144218991).
Provider details
- NPI number
- 1144218991
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 0101284099 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
5,597 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 1,111 | $8 |
| Ct Scan Head Or Brain Without Contrast70450 | 493 | $38 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 244 | $83 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 208 | $80 |
| Ct Scan of Upper Spine Without Contrast72125 | 193 | $45 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 175 | $83 |
Practice location
Mailing address
Additional practice locations (3)
- 400 Health Park BlvdSt Augustine, FL 32086-5784Phone: (904) 819-5155
- 743 Spring St NeGainesville, GA 30501-3715Phone: (770) 219-9000
- 2300 Opitz BlvdWoodbridge, VA 22191-3311Phone: (703) 523-1199
Registry dates
- Enumerated
- 2005-10-06
- Last updated
- 2025-10-01
- Certified
- 2025-10-01
Frequently asked questions
- What is Malcolm Williamson's NPI number?
- Malcolm Williamson's National Provider Identifier (NPI) is 1144218991, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Malcolm Williamson's specialty?
- Malcolm Williamson is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Malcolm Williamson located?
- Malcolm Williamson's practice location on file with NPPES is 1818 Sw 15th Ave, Ocala, FL 34474-3548.
- What is Malcolm Williamson's phone number?
- The practice phone number listed in the NPPES registry for Malcolm Williamson is (352) 671-4300.
- Does Malcolm Williamson accept Medicare?
- Malcolm Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Malcolm Williamson's NPI active?
- Yes — Malcolm Williamson's NPI (1144218991) is active in the NPPES registry as of the last update on 2025-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.