Andrew Williamson, D.C.
NPI 1740455401 · Chiropractor · Mount Airy, MD
Enrolled with Medicare as Practitioner - Chiropractic · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrew Williamson, D.C. is a Chiropractor provider in Mount Airy, MD (NPI 1740455401).
Provider details
- NPI number
- 1740455401
- Entity type
- Individual
- Primary specialty
- ChiropractorChiropractic Providers
- Credential
- D.C.
- Sex
- Male
- Sole proprietor
- No
- License
- 01985 (MD)
Specialties & taxonomies
Chiropractic Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-04-24
- Last updated
- 2008-04-24
Frequently asked questions
- What is Andrew Williamson's NPI number?
- Andrew Williamson's National Provider Identifier (NPI) is 1740455401, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrew Williamson's specialty?
- Andrew Williamson is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
- Where is Andrew Williamson located?
- Andrew Williamson's practice location on file with NPPES is 603 E Ridgeville Blvd, Mount Airy, MD 21771-5249.
- What is Andrew Williamson's phone number?
- The practice phone number listed in the NPPES registry for Andrew Williamson is (301) 829-4040.
- Does Andrew Williamson accept Medicare?
- Andrew Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrew Williamson's NPI active?
- Yes — Andrew Williamson's NPI (1740455401) is active in the NPPES registry as of the last update on 2008-04-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.