Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander A Stemer, MD

Infectious Disease Physician in Munster, IN · enumerated 2006.

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

National Provider Identifier

1861451429

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Registry record

Entity type Individual (Type 1)

Name Alexander A Stemer

Credential MD

Sex Male

Practice address 10110 Don S Powers Drive, Ste 101d, Munster, IN, 46321

Phone (219) 922-3002

Fax (219) 922-3003

Enumeration date Mar 22, 2006

Last updated in NPPES Apr 14, 2021

Taxonomy & licenses

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 01025591 (IN) Primary

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

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

Where does Alexander Stemer practice?

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

What is the NPI number for Alexander Stemer?

The National Provider Identifier (NPI) for Alexander Stemer is 1861451429, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-14.