Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mark Louis Westphal, MD

Dermatology Physician in Carbondale, IL · enumerated 2006 · practices at Mark L Westphal.

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

National Provider Identifier

1043388242

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Registry record

Entity type Individual (Type 1)

Name Mark Louis Westphal

Credential MD

Sex Male

Practice address Carbondale, IL, 62901

Phone (618) 549-0841

Fax (618) 529-2442

Enumeration date Dec 4, 2006

Last updated in NPPES Feb 5, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 036055065 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
0003900142	Other	IL	BLUE CROSS BL SH OF IL
027382	Other	IL	HEALTH ALLIANCE
110858	Other	IL	HEALTHLINK
1073255002	Other	IL	CIGNA

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.

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Frequently asked questions

What specialty is Mark Westphal?

Mark Westphal is registered in NPPES with the primary taxonomy of Dermatology Physician. 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 →

Kelly Hand Physician Assistant · Carbondale, IL NPI 1851502421 Mark L Westphal Dermatology Physician · Carbondale, IL NPI 1477311694

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-05.