Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark A Severtson, M.D.

Otolaryngology Physician in Louisville, KY · enumerated 2005.

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

National Provider Identifier

1861499576

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Registry record

Entity type Individual (Type 1)

Name Mark A Severtson

Credential M.D.

Sex Male

Practice address 6420 Dutchmans Pkwy, 380, Louisville, KY, 40205

Phone (502) 894-8441

Fax (502) 894-4453

Enumeration date Jul 7, 2005

Last updated in NPPES Oct 10, 2025

Taxonomy & licenses

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License 34466 (KY) Primary

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License 01049174 (IN) Secondary

207YX0901X Otology & Neurotology Physician Allopathic & Osteopathic Physicians · License 01049174 (IN) Secondary

207YX0901X Otology & Neurotology Physician Allopathic & Osteopathic Physicians · License 34466 (KY) Secondary

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
000000045447	Other	KY	ANTHEM FACET NUMBER
040012436	Other	KY	RAIL ROAD MEDICARE
64344666	Medicaid	KY	-
200175990A	Medicaid	IN	-

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 Severtson?

The National Provider Identifier (NPI) for Mark Severtson is 1861499576, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Severtson practice?

The practice location on file with NPPES is in Louisville, KY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-10.