NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark J Cotter, PAC

Physician Assistant in Salisbury, MD · enumerated 2006 · practices at Peninsula Pathology Associates, PA.

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

National Provider Identifier

1518946524

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mark J Cotter
Credential PAC
Sex Male
Practice address 100 East Carroll Street, Salisbury, MD, 21801
Phone (410) 543-7100
Fax (410) 546-6350
Enumeration date Jan 10, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License C0001015 (MD) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Mark Cotter?
Mark Cotter is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.