William Fuller Baker, D.O.

Primary specialty

Orthopaedic Surgery PhysicianTaxonomy code 207X00000X

License

OS025806 Issued in PA

Practice address

538 N Queen St
Lancaster, PA 17603-3046

Phone

(717) 393-1900

NPI assigned

Jun 4, 2020

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Specialty

Orthopedic Surgery

Education

Rowan University School of Osteopathic Medicine, 2020

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1591228800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1780531200000",
    "number": "1134743297",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "538 N QUEEN ST",
            "city": "LANCASTER",
            "state": "PA",
            "postal_code": "176033046",
            "telephone_number": "856-566-6853"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "538 N QUEEN ST",
            "city": "LANCASTER",
            "state": "PA",
            "postal_code": "176033046",
            "telephone_number": "717-393-1900"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BAKER",
        "first_name": "WILLIAM",
        "middle_name": "FULLER",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-06-04",
        "last_updated": "2026-06-04",
        "certification_date": "2026-06-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "PA",
            "license": "OS025806",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Josiah Phillip Baker, PA-C
• Lauren Baker, LCSW
• Lynda G Baker, P.T.
• Robert Baker, CRNA
• Theresa Baker, LCSW
• Mark P. Bakey, RN, CRNFA
• Whitney Jo Dennison Bakken, MD
• William W Bakken, M.D.
• Fabien K Baksh, M.D.
• Shashi Baksh, M.D.

• Orthopaedic Surgery Physician in Lancaster, PA
• Providers in Lancaster, PA by specialty
• Orthopaedic Surgery Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 4, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.