Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Mark S Okonski, MD

Individual provider Gastroenterology Physician · NPI 1952393209

Dr. Mark S Okonski, MD is a Gastroenterology in Port Matilda, Pennsylvania. Qualified in 1985, 41 years ago. Practices with Geisinger Clinic, a 3,413-clinician group and accepts Medicare assignment. Licensed in Pennsylvania and Tennessee.

Years since qualifying
41
Licensed in
PA, TN
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

132 Abigail Ln
Port Matilda, PA 16870-7153
Phone: (814) 272-5011
Fax: (814) 272-6531
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD488012 (PA)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 71344 (TN)

Record details

NPI number1952393209
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 22, 2005
Last updated in NPPESNovember 3, 2025
Certification dateNovember 3, 2025
Mailing address13440 Blue Bay Cir, Fort Myers, FL 33913-8761

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolOTHER
Graduated 1985 (41 years in practice)
Group practice Geisinger Clinic — 3413 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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