Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christos Argirios Katsigiannis, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Houston, TX · enumerated 2005.

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

National Provider Identifier

1194725234

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Registry record

Entity type Individual (Type 1)

Name Christos Argirios Katsigiannis

Credential MD

Sex Male

Practice address 427 W 20th St Ste 300, Houston, TX, 77008

Phone (713) 791-1633

Fax (713) 791-1710

Enumeration date Jul 29, 2005

Last updated in NPPES Dec 17, 2024

Taxonomy & licenses

174400000X Specialist Other Service Providers · License J0036 (TX) Secondary

2085R0204X Vascular & Interventional Radiology Physician Allopathic & Osteopathic Physicians · License J0036 (TX) Secondary

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License J0036 (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
117274405	Medicaid	TX	-

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

What is the NPI number for Christos Katsigiannis?

The National Provider Identifier (NPI) for Christos Katsigiannis is 1194725234, a Type 1 (individual) record in the CMS NPPES registry.

Where does Christos Katsigiannis practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-17.