Mark Williams, M.D.
NPI 1952446015 · Anatomic Pathology & Clinical Pathology Physician · Richmond, VA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Williams, M.D. is a Anatomic Pathology & Clinical Pathology Physician provider in Richmond, VA (NPI 1952446015).
Provider details
- NPI number
- 1952446015
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101237794 (VA)
Specialties & taxonomies
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
3,021 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 1,691 | $35 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 267 | $27 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 214 | $77 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 146 | $33 |
| Microscopic Genetic Analysis of Tumor, Manual88360 | 130 | $39 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 97 | $10 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-20
- Last updated
- 2011-08-01
Frequently asked questions
- What is Mark Williams's NPI number?
- Mark Williams's National Provider Identifier (NPI) is 1952446015, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Williams's specialty?
- Mark Williams is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Williams located?
- Mark Williams's practice location on file with NPPES is 5801 Bremo Rd, Richmond, VA 23226-1907.
- What is Mark Williams's phone number?
- The practice phone number listed in the NPPES registry for Mark Williams is (804) 281-8100.
- Does Mark Williams accept Medicare?
- Mark Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Williams's NPI active?
- Yes — Mark Williams's NPI (1952446015) is active in the NPPES registry as of the last update on 2011-08-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.