Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Mark D. Williams, PA-C
Physician Assistant in Salem, OR · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1255369765
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Registry record
Entity type Individual (Type 1)
Name Mr. Mark D. Williams
Credential PA-C
Sex Male
Practice address 1793 13th St Se, Salem, OR, 97302
Phone (503) 362-8385
Fax (503) 362-8435
Enumeration date Jun 30, 2006
Last updated in NPPES Jul 13, 2015
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA00623 (OR) Primary
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.
Frequently asked questions
Where does Mark Williams practice?
The practice location on file with NPPES is in Salem, OR. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Williams?
The National Provider Identifier (NPI) for Mark Williams is 1255369765, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Russell Young Dermatology Physician · Salem, OR NPI 1144285529 Charles Wagner Allergy & Immunology Physician · Salem, OR NPI 1366540742 Rick Pittman Vascular Surgery Physician · Salem, OR NPI 1104990175 William Lear MOHS-Micrographic Surgery Physician · Salem, OR NPI 1558553115 Angela Bohlke Dermatopathology Physician · Salem, OR NPI 1649453390 Silver Falls Dermatology, LLC Dermatology Physician · Salem, OR NPI 1134375421 Sandra Hadenfeld Nurse Practitioner · Salem, OR NPI 1710123054 Silver Falls Dermatology, LLC Clinical Medical Laboratory · Salem, OR NPI 1770800930
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-07-13.