Dr. William Fuller Baker , DO
Orthopaedic Surgery β’ Lancaster, PA
538 N Queen St
Lancaster, PA 176033046
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
Practice Location & Contact Primary Location
538 N Queen St
Lancaster, PA 176033046
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Open Payments general payments, program year 2025
All general payments: $1,692.86 across 17 records.
By nature of payment
- Travel and Lodging: $1,161.71 across 6 records.
- Food and Beverage: $531.15 across 11 records.
Reporting-company totals
- Arthrex, Inc.: $841.16 across 3 records.
- Zimmer Biomet Holdings, Inc.: $740.30 across 11 records.
- Eclipse Technology Solutions Inc.: $111.40 across 3 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2020
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Can order Medicare-covered services
CMS lists Dr. Baker as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Lancaster and Pennsylvania
48 active clinicians are listed under Orthopaedic Surgery with a practice address in Lancaster, PA (1,254 in Pennsylvania).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Lancaster
0% of these 48 clinicians have the CMS telehealth indicator.
64.6% of these 48 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2025 only.
Sources: CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 β December 31, 2025): 17 records totaling $1,692.86.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Arthrex, Inc. |
Travel and Lodging
In-kind items and services
|
β | General | $572.96 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
Comprehensive Shoulder System | General | $249.70 |
| Arthrex, Inc. |
Travel and Lodging
In-kind items and services
|
β | General | $244.20 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
Comprehensive Shoulder System | General | $149.73 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
DVR Anatomic Kickstand | General | $126.16 |
| Eclipse Technology Solutions Inc. |
Food and Beverage
In-kind items and services
|
β | General | $69.59 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
Comprehensive Shoulder System | General | $56.68 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
Sidus Stem-Free Shoulder | General | $30.82 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
Comprehensive Shoulder System | General | $30.39 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
Comprehensive Shoulder System | General | $27.11 |
| Arthrex, Inc. |
Food and Beverage
In-kind items and services
|
β | General | $24.00 |
| Eclipse Technology Solutions Inc. |
Food and Beverage
In-kind items and services
|
β | General | $21.36 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
Comprehensive Shoulder System | General | $21.20 |
| Eclipse Technology Solutions Inc. |
Food and Beverage
In-kind items and services
|
β | General | $20.45 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
Comprehensive Shoulder System | General | $18.98 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
Comprehensive Shoulder System | General | $18.47 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
Comprehensive Shoulder System | General | $11.06 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-06-04NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
NUCC Taxonomy Code: 390200000X
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSSources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Orthopaedic Surgery
Physician Assistant (Certified)
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Physician Assistant - Surgical
Physician Assistant (Certified)
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Physician Assistant - Surgical
Physician Assistant (Certified)
Physician Assistant
Physician Assistant
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 538 N QUEEN ST, LANCASTER, PA 176033046 (Tel: 7173931900)
Registered at 538 N QUEEN ST, LANCASTER, PA 176033046 (Tel: 8565666853)
NPI status registered as active in NPPES database
Registered at 1 MEDICAL CENTER DR STE 146, STRATFORD, NJ 080841500 (Tel: 8565666853)
Registered at 1 MEDICAL CENTER DR STE 146, STRATFORD, NJ 080841500 (Tel: 8565666853)
Recorded as WILLIAM BAKER, D.O.
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Lancaster
- Dr. Justin Stull, MD
- Dr. Paul Carroll, MD
- Dr. Brendan Casey, DO
- Dr. Seth Baublitz, DO
- Dr. Mark Perezous, MD
- Dr. David Sieger, MD
Mailing Address
538 N Queen St
Lancaster, PA 176033046
Phone: 8565666853