Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Alexander C. Gatzimos MD Jd

Q: What type of organization is Alexander C. Gatzimos MD Jd?

Alexander C. Gatzimos MD Jd is registered in NPPES as a Geriatric Medicine (Internal Medicine) Physician (its primary provider taxonomy).

Geriatric Medicine (Internal Medicine) Physician in South Bend, IN · enumerated 2013 · authorized official Alexander Gatzimos, Manager.

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

National Provider Identifier

1154663763

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Registry record

Entity type Organization (Type 2)

Legal business name Alexander C. Gatzimos MD Jd

Other name <Unavail>

Practice address 2050 E Ireland Rd, South Bend, IN, 46614

Phone (574) 222-2359

Fax (574) 222-2365

Enumeration date Mar 21, 2013

Last updated in NPPES Oct 1, 2013

Taxonomy & classification

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 01036818A (IN) Primary

Authorized official

Name Alexander Gatzimos

Title Manager

Phone (574) 249-8663

Other identifiers

Identifier	Type	State	Issuer
D95574	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 type of organization is Alexander C. Gatzimos MD Jd?

Alexander C. Gatzimos MD Jd is registered in NPPES as a Geriatric Medicine (Internal Medicine) Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-10-01.