WILLIAM FULLER BAKER D.O.
NPI 1134743297
Orthopaedic Surgery in Lancaster, PA
About William Fuller Baker D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM FULLER BAKER D.O. (NPI 1134743297) is an individual orthopaedic surgery provider in Lancaster, Pennsylvania, licensed in Pennsylvania (OS025806) and active in the NPI registry since June 2020. He is enrolled in Medicare PECOS and is a graduate of Rowan University School Of Osteopathic Medicine (2020).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
William Fuller Baker D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show William Baker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Lancaster, PA 17603
- Reassigned Medicare billing, Pennsylvania enrollment
- 727 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 17603 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Baker's NPI number?
The NPI number for William Baker is 1134743297. It was assigned to this individual provider in the NPPES registry on June 4, 2020.
Where is William Baker located?
William Baker practices at 538 N Queen St, Lancaster, PA 17603. The listed phone number is (717) 393-1900.
What is William Baker's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is William Baker enrolled in Medicare?
Yes. William Baker is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for William Baker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Baker reassigns Medicare benefits to Lancaster General Medical Group (Lancaster, PA). 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 William Baker'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 William Baker was last updated on June 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.