Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory A Merchun, MD

Diagnostic Radiology Physician in Indianapolis, IN · enumerated 2005 · practices at Radiology of Indiana P C.

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

National Provider Identifier

1770577538

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Registry record

Entity type Individual (Type 1)

Name Gregory A Merchun

Credential MD

Sex Male

Practice address 9998 Crosspoint Blvd Ste 200, Indianapolis, IN, 46256

Phone (317) 579-2150

Fax (317) 579-2130

Enumeration date Sep 8, 2005

Last updated in NPPES Jan 13, 2021

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 1041539 (IN) Secondary

2085R0204X Vascular & Interventional Radiology Physician Allopathic & Osteopathic Physicians · License 01041539A (IN) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 01041539A (IN) 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
300059735	Other	IN	RAILROAD MEDICARE
P00033109	Other	-	RR MEDICARE PIN
P00033111	Other	-	RR MEDICARE PIN
P00033221	Other	-	RR MEDICARE PIN
000000109954	Other	IN	ANTHEM
P00033105	Other	-	RR MEDICARE PIN
P00032760	Other	-	RR MEDICARE PIN
P00032762	Other	-	RR MEDICARE PIN
P00033108	Other	-	RR MEDICARE PIN
P00032763	Other	-	RR MEDICARE PIN
P00033110	Other	-	RR MEDICARE PIN
P00033230	Other	-	RR MEDICARE PIN
100320670A	Medicaid	IN	-
P00033112	Other	-	RR MEDICARE PIN
P00033220	Other	-	RR MEDICARE PIN

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.

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Frequently asked questions

How do I verify Gregory Merchun's NPI record?

Cross-check NPI 1770577538 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1770577538 active?

Yes, as of the latest NPPES snapshot, NPI 1770577538 is active (record last updated 2021-01-13).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-13.