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

Dr. Leon William Nowierski, M.D.

Dermatology Physician in Boise, ID · enumerated 2006 · practices at L. William D. Nowierski, M.D. PA.

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

National Provider Identifier

1376610048

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Registry record

Entity type Individual (Type 1)

Name Dr. Leon William Nowierski

Credential M.D.

Sex Male

Practice address Boise, ID, 83712

Phone (208) 343-5910

Fax (208) 384-8562

Enumeration date Nov 29, 2006

Last updated in NPPES Aug 26, 2022

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

Taxonomy & licenses

207ND0101X MOHS-Micrographic Surgery Physician Allopathic & Osteopathic Physicians · License M4341 (ID) Secondary

207NS0135X Procedural Dermatology Physician Allopathic & Osteopathic Physicians · License M4341 (ID) Secondary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License M4341 (ID) 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
43414	Other	ID	BLUE CROSS OF IDAHO
000010021230	Other	ID	BLUE SHIELD OF IDAHO
002586300	Medicaid	ID	-

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 Leon Nowierski?

The National Provider Identifier (NPI) for Leon Nowierski is 1376610048, a Type 1 (individual) record in the CMS NPPES registry.

Where does Leon Nowierski practice?

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

Other providers at this practice address

Browse all →

J. Chris Kantarian Colon & Rectal Surgery Physician · Boise, ID NPI 1699774042 Renee Bourquard Surgery Physician · Boise, ID NPI 1790737591 Benjamin Karsten Surgery Physician · Boise, ID NPI 1124227137 L. William D. Nowierski, M.D. PA Medical Specialty Clinic/Center · Boise, ID NPI 1710166004

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-26.