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

Mark A Thomas, MD

Individual provider Internal Medicine Physician · NPI 1629086277

Mark A Thomas, MD is an Internal Medicine in Topeka, Kansas. Qualified in 1990, 36 years ago. Practices with Cotton-O'Neil Clinic Revocable Trust, a 658-clinician group and accepts Medicare assignment. Licensed in Kansas.

Years since qualifying
36
Licensed in
KS
In the registry since
2006
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

4409 SW Shenandoah Rd
Topeka, KS 66610-1678
Phone: (785) 554-6259
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 04-25848 (KS)

Record details

NPI number1629086277
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 3, 2006
Last updated in NPPESMay 1, 2026
Certification dateMay 1, 2026
Mailing address4409 Sw Shenandoah Rd, Topeka, KS 66610-1678

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1990 (36 years in practice)
Group practice Cotton-O'Neil Clinic Revocable Trust — 658 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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