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

Dr. Andrzej R Maciejewski, MD

Nephrology Physician in Anchorage, AK · enumerated 2006.

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

National Provider Identifier

1194780114

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Registry record

Entity type Individual (Type 1)

Name Dr. Andrzej R Maciejewski

Credential MD

Sex Male

Practice address Anchorage, AK, 99508

Phone (907) 222-1714

Fax (907) 222-1724

Enumeration date Apr 20, 2006

Last updated in NPPES Mar 5, 2026

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

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 4655 (AK) Primary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 1004693 (AK) 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
MD2805	Medicaid	AK	-
P00117806	Other	-	RAILROAD MEDICARE

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 Andrzej Maciejewski?

The National Provider Identifier (NPI) for Andrzej Maciejewski is 1194780114, a Type 1 (individual) record in the CMS NPPES registry.

Where does Andrzej Maciejewski practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-05.