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ANDREW WILLIAMSON D.C.
NPI 1740455401
Chiropractor in Mount Airy, MD

Active since April 24, 2008PECOS Enrolled
603 E RIDGEVILLE BLVD, MOUNT AIRY, MD 21771(301) 829-4040(301) 829-4041 Get Directions Write a Review

NPPES record last updated: April 24, 2008. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Andrew Williamson D.c. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ANDREW WILLIAMSON D.C. (NPI 1740455401) is an individual chiropractor in Mount Airy, Maryland, licensed in Maryland (01985) and active in the NPI registry since April 2008. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1740455401
Entity TypeIndividualMale
Primary Taxonomy111N00000X
Provider Legal NameANDREW WILLIAMSONCredential: D.C.
Location Address603 E RIDGEVILLE BLVDMount Airy, MD 21771-5249
Mailing Address603 E. Ridgeville BlvdMt. Airy, MD 21771 · (301) 829-4040 · Fax (301) 829-4041
Phone(301) 829-4040
Fax(301) 829-4041
Sole ProprietorNo
Enumeration DateApril 24, 2008
✔ NPI 1740455401 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyChiropractorChiropractic Providers
Taxonomy Code111N00000X
License✔ Licensed in MD · 01985
Definition
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.
603 E RIDGEVILLE BLVD, Mount Airy, MD 21771
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Other Identifiers 1

Medicare UPIN327MMD

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Andrew Williamson D.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Andrew Williamson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Chiropractic First
Same address
Chiropractor
603 E RIDGEVILLE BLVD
Mount Airy, MD 21771
  • Reassigned Medicare billing, Maryland enrollment
NPI 1528090958 (301) 829-4040

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

HEALING CONNECTION PSYCHOTHERAPY INCORPORATED
Social Worker (Clinical)
603 E RIDGEVILLE BLVD
MOUNT AIRY, MD 21771
Frederick County (301) 703-2260
CHIROPRACTIC FIRST
Chiropractor
603 E RIDGEVILLE BLVD
MOUNT AIRY, MD 21771
Frederick County (301) 829-4040
DR. MATTHEW THOMAS JACOBS DC
Chiropractor
603 E RIDGEVILLE BLVD
MOUNT AIRY, MD 21771
Frederick County (301) 829-4040
MT. AIRY PSYCHOLOGICAL SERVICES, LLC
Psychologist
603 E RIDGEVILLE BLVD
MOUNT AIRY, MD 21771
Frederick County (301) 200-3853
DR. LENORA ROAT ARRINGTON PSYD
Psychologist (Clinical)
603 E RIDGEVILLE BLVD
MOUNT AIRY, MD 21771
Frederick County (301) 693-9275
CHRISTINA DEVLING
Psychologist
603 E RIDGEVILLE BLVD
MOUNT AIRY, MD 21771
Frederick County (310) 200-3853

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Andrew Williamson's NPI number?

The NPI number for Andrew Williamson is 1740455401. It was assigned to this individual provider in the NPPES registry on April 24, 2008.

Where is Andrew Williamson located?

Andrew Williamson practices at 603 E Ridgeville Blvd, Mount Airy, MD 21771. The listed phone number is (301) 829-4040.

What is Andrew Williamson's specialty?

The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.

Is Andrew Williamson enrolled in Medicare?

Yes. Andrew Williamson is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Andrew Williamson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Williamson reassigns Medicare benefits to Chiropractic First (Mount Airy, MD). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Andrew Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Andrew Williamson was last updated on April 24, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.