NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Stanley Williams, DO

Orthopaedic Surgery Physician in Bloomsburg, PA · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1477554624

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mark Stanley Williams
Credential DO
Sex Male
Practice address 6850 Lows Rd, Bloomsburg, PA, 17815
Phone (570) 784-7300
Fax (570) 784-7331
Enumeration date Aug 9, 2005
Last updated in NPPES Mar 19, 2021

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 05008141L (PA) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
0016392810001 Medicaid PA -

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Mark Williams?
The National Provider Identifier (NPI) for Mark Williams is 1477554624, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Williams practice?
The practice location on file with NPPES is in Bloomsburg, PA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-19.