Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Igor Darko Gregoric, M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Houston, TX · enumerated 2006.

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

National Provider Identifier

1043308844

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Registry record

Entity type Individual (Type 1)

Name Dr. Igor Darko Gregoric

Credential M.D.

Sex Male

Practice address 1101 Bates Ave, Suite P-514, Houston, TX, 77030

Phone (832) 355-4900

Fax (832) 355-3770

Enumeration date Oct 10, 2006

Last updated in NPPES Feb 29, 2012

Taxonomy & licenses

174400000X Specialist Other Service Providers · License L0223 (TX) Secondary

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License L0223 (TX) 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
020047577	Other	TX	RAILROAD MEDICARE

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 Igor Gregoric's NPI record?

Cross-check NPI 1043308844 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1043308844 active?

Yes, as of the latest NPPES snapshot, NPI 1043308844 is active (record last updated 2012-02-29).

Other providers at this practice address

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Octavio Pajaro Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Houston, TX NPI 1629065677 Kenneth Liao Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Houston, TX NPI 1417053869 James Livesay Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Houston, TX NPI 1285721738 David Ott Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Houston, TX NPI 1093802530 John Duncan Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Houston, TX NPI 1003903543 O Frazier Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Houston, TX NPI 1528156304 Joseph Coselli Surgery Physician · Houston, TX NPI 1144300583 Surgical Associates of Texas PA Specialist · Houston, TX NPI 1629102181

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-29.