WILLIAM BUCK DO
NPI 1528647856
Internal Medicine in Laurel, MS
About William Buck Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM BUCK DO (NPI 1528647856) is an individual internal medicine provider in Laurel, Mississippi, licensed in Mississippi (T-4413) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS, is affiliated with Jasper General Hospital, and maintains 4 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 4
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
William Buck Do 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 Reassignments
2Medicare enrollment records show William Buck reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Laurel, MS 39440
- Reassigned Medicare billing, Mississippi enrollment
- 205 clinicians in this Medicare group
Jackson, MS 39216
- Reassigned Medicare billing, Mississippi enrollment
- 1,932 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 5
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.
Jasper General Hospital
Acute Care Hospitals · Bay Springs, MSSouth Central Reg Med Ctr
Acute Care Hospitals · Laurel, MSMagee General Hospital
Acute Care Hospitals · Magee, MSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 39440 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 20
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 William Buck's NPI number?
The NPI number for William Buck is 1528647856. It was assigned to this individual provider in the NPPES registry on April 5, 2021.
Where is William Buck located?
William Buck practices at 1220 Jefferson St, Laurel, MS 39440. The listed phone number is (601) 649-2863.
What is William Buck's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is William Buck enrolled in Medicare?
Yes. William Buck 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 organizations bill Medicare for William Buck's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Buck reassigns Medicare benefits to 2 organizations: South Central Clinics, Inc. (Laurel, MS) and State Of Mississippi - University Of Mississippi Medical Center (Jackson, MS). Each 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 William Buck's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Buck accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 3 other insurers list William Buck 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 William Buck affiliated with any hospitals?
According to CMS data, William Buck is affiliated with Jasper General Hospital, South Central Reg Med Ctr and Magee General Hospital.
When was this NPI record last updated?
The NPPES record for William Buck was last updated on October 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 days 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.
# William Buck, DO · NPI 1528647856
Internal Medicine physician in Laurel, Mississippi. Individual provider, active in the CMS NPPES registry since April 5, 2021.
## Identity
- **NPI:** 1528647856 (Entity type: Individual)
- **Enumerated:** April 5, 2021
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** T-4413 (Mississippi)
- **Sole proprietor:** No
## Practice location
- **Address:** 1220 JEFFERSON ST, Laurel, MS 39440-4355
- **Phone:** (601) 649-2863 · **Fax:** (601) 649-9479
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): South Central Clinics, Inc. (NPI 1528918919, Laurel, MS); State Of Mississippi - University Of Mississippi Medical Center (NPI 1154317527, Jackson, MS) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** William Carey University College Of Osteopathic Medicine, class of 2021
## Record status
- **NPPES last updated:** October 8, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1528647856) · Data from the CMS NPPES public registry.