ANTHONY WILLIAMSON M.D.
NPI 1609829845
Psychiatry & Neurology - Neurology in Bluffton, SC
About Anthony Williamson M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANTHONY WILLIAMSON M.D. (NPI 1609829845) is an individual neurology provider in Bluffton, South Carolina, licensed in Montana (10121) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with St Peters Health, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Anthony Williamson M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Anthony Williamson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Townsend, MT 59644
- Reassigned Medicare billing, Montana enrollment
- Medicare enrollment name: St Peters Health
- 304 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 10
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Peters Health
Acute Care Hospitals · Helena, MTSt James Healthcare
Acute Care Hospitals · Butte, MTCommunity Hospital Of Anaconda
Critical Access Hospitals · Anaconda, MTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 29910 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BLUFFTON, SC 29910
BLUFFTON, SC 29910
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 Anthony Williamson's NPI number?
The NPI number for Anthony Williamson is 1609829845. It was assigned to this individual provider in the NPPES registry on May 18, 2006.
Where is Anthony Williamson located?
Anthony Williamson practices at 75 Baylor Dr Ste 155, Bluffton, SC 29910. The listed phone number is (843) 836-3667.
What is Anthony Williamson's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.
Is Anthony Williamson enrolled in Medicare?
Yes. Anthony Williamson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Anthony Williamson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Anthony Williamson reassigns Medicare benefits to St. Peter's Health (Townsend, MT). 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 Anthony Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Anthony Williamson accept?
Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans and Providence Health Plan list Anthony Williamson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Anthony Williamson affiliated with any hospitals?
According to CMS data, Anthony Williamson is affiliated with St Peters Health, St James Healthcare and Community Hospital Of Anaconda.
When was this NPI record last updated?
The NPPES record for Anthony Williamson was last updated on January 6, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Anthony Williamson, M.D. · NPI 1609829845
Neurology physician in Bluffton, South Carolina. Individual provider, active in the CMS NPPES registry since May 18, 2006.
## Identity
- **NPI:** 1609829845 (Entity type: Individual)
- **Enumerated:** May 18, 2006
- **Primary specialty:** Psychiatry & Neurology - Neurology · taxonomy 2084N0400X
- **State license:** 10121 (Montana)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 75 BAYLOR DR STE 155, Bluffton, SC 29910-8965
- **Phone:** (843) 836-3667
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** St. Peter's Health (NPI 1174165682, Townsend, MT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Arkansas College Of Medicine, class of 1998
## Record status
- **NPPES last updated:** January 6, 2020
- **Other identifiers:** Medicaid 0047983 (MT)
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Source: [NPI Profile](https://npiprofile.com/npi/1609829845) · Data from the CMS NPPES public registry.