Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Andrew Williamson, D.C.
Chiropractor in Mount Airy, MD · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1740455401
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Registry record
Entity type Individual (Type 1)
Name Andrew Williamson
Credential D.C.
Sex Male
Practice address 603 E Ridgeville Blvd, Mount Airy, MD, 21771
Phone (301) 829-4040
Fax (301) 829-4041
Enumeration date Apr 24, 2008
Last updated in NPPES Apr 24, 2008
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Andrew Williamson?
Andrew Williamson is registered in NPPES with the primary taxonomy of Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Chiropractic First Chiropractor · Mount Airy, MD NPI 1528090958 Lenora Arrington Clinical Psychologist · Mount Airy, MD NPI 1942588272 Matthew Jacobs Chiropractor · Mount Airy, MD NPI 1750872669 Healing Connection Psychotherapy Incorporated Clinical Social Worker · Mount Airy, MD NPI 1467055210 Mt. Airy Psychological Services, LLC Psychologist · Mount Airy, MD NPI 1760291702 Christina Devling Psychologist · Mount Airy, MD NPI 1952192064
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-24.