Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark S Okonski, MD

Gastroenterology Physician in Port Matilda, PA · enumerated 2005.

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

National Provider Identifier

1952393209

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark S Okonski

Credential MD

Sex Male

Practice address 132 Abigail Ln, Port Matilda, PA, 16870

Phone (814) 272-5011

Fax (814) 272-6531

Enumeration date Aug 22, 2005

Last updated in NPPES Nov 3, 2025

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License MD488012 (PA) Primary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 71344 (TN) Secondary

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
12412	Other	FL	BLUE CROSS BLUE SHIELD
P00232929	Other	FL	RR MEDICARE
054473600	Medicaid	FL	-

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Mark Okonski?

Mark Okonski is registered in NPPES with the primary taxonomy of Gastroenterology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Michael Lesko Cardiovascular Disease Physician · Port Matilda, PA NPI 1124019104 Dora Green Certified Registered Nurse Anesthetist · Port Matilda, PA NPI 1245217124 Mark Armstrong Surgery Physician · Port Matilda, PA NPI 1013981711 David Coggins Pediatrics Physician · Port Matilda, PA NPI 1679549174 Shaheen Gill Pediatrics Physician · Port Matilda, PA NPI 1174591630 Sheldon Henry Cardiovascular Disease Physician · Port Matilda, PA NPI 1295704609 Daniel Kim Urogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician · Port Matilda, PA NPI 1114986817 Jeffrey Lichtenstein Gastroenterology Physician · Port Matilda, PA NPI 1598726598

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-03.