Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Mirro, MD

Gastroenterology Physician in Merrillville, IN · enumerated 2005.

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

National Provider Identifier

1689678955

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. John Mirro

Credential MD

Sex Male

Practice address 101 E 87th Ave Ste 420, Merrillville, IN, 46410

Phone (219) 758-5008

Fax (219) 758-5009

Enumeration date Jun 2, 2005

Last updated in NPPES Mar 15, 2023

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 01024382A (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
110044492	Other	IN	RAILROAD MEDICARE
100187310A	Medicaid	IN	-
000000085025	Other	IN	ANTHEM BC/BS
9115389	Other	IL	ANTHEM BC/BS

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

Is NPI 1689678955 active?

Yes, as of the latest NPPES snapshot, NPI 1689678955 is active (record last updated 2023-03-15).

How do I verify John Mirro's NPI record?

Cross-check NPI 1689678955 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Bryan Robins Surgery Physician · Merrillville, IN NPI 1023549938 Anastacia Mesina Medical Physician Assistant · Merrillville, IN NPI 1356933428

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-15.