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

Alexander Grantsaris

Family Nurse Practitioner in Gary, IN · enumerated 2016.

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

National Provider Identifier

1922554831

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Registry record

Entity type Individual (Type 1)

Name Alexander Grantsaris

Sex Male

Practice address Gary, IN, 46402

Phone (219) 886-4289

Enumeration date Aug 31, 2016

Last updated in NPPES Aug 22, 2019

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

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 115857 (MT) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 28197039A (IN) Primary

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 Grantsaris practice?

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

What is the NPI number for Alexander Grantsaris?

The National Provider Identifier (NPI) for Alexander Grantsaris is 1922554831, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-08-22.