DR. JOHN MICHAEL WILLIAMSON DNP, FNP-C, ARM-BC
NPI 1336326560
Nurse Practitioner - Family in Columbus, MS
About Dr. John Michael Williamson Dnp, Fnp-c, Arm-bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN MICHAEL WILLIAMSON DNP, FNP-C, ARM-BC (NPI 1336326560) is an individual family provider in Columbus, Mississippi, licensed in Mississippi (R853568) and active in the NPI registry since January 2008. He is enrolled in Medicare PECOS, maintains a secondary practice location in Saltillo, and is a graduate of Other (2014).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. John Michael Williamson Dnp, Fnp-c, Arm-bc 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.
Areas of Expertise CMS Part B claims 2
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 39705 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 John Williamson's NPI number?
The NPI number for John Williamson is 1336326560. It was assigned to this individual provider in the NPPES registry on January 30, 2008.
Where is John Williamson located?
John Williamson practices at 1503 Highway 45 N, Columbus, MS 39705. The listed phone number is (662) 328-9623.
What is John Williamson's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is John Williamson enrolled in Medicare?
Yes. John 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.
What insurance does John Williamson accept?
Health plans from Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Magnolia Health, Ambetter of Alabama and Ambetter of Tennessee and 3 other insurers list John 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.
When was this NPI record last updated?
The NPPES record for John Williamson was last updated on January 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.
