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

Mr. Theodoros Voloyiannis, MD

Individual provider Colon & Rectal Surgery Physician · NPI 1891911228

Mr. Theodoros Voloyiannis, MD is a Colorectal Surgery (Proctology) in Houston, Texas. Qualified in 1998, 28 years ago. Practices with Texas Oncology PA, a 1,005-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
28
Licensed in
TX
In the registry since
2007
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

7400 Fannin St Ste 1295
Houston, TX 77054-1934
Phone: (832) 377-3770
Fax: (713) 341-1574
Show map & directions

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

Additional practice locations (1)

  • 400 W Medical Center Blvd Ste 205, Webster, TX 77598-4227 — (832) 932-1720

Specialties & licences

Colon & Rectal Surgery Physician (primary) Taxonomy 208C00000X · Licence M2858 (TX)

Record details

NPI number1891911228
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 17, 2007
Last updated in NPPESApril 15, 2019

Medicare enrollment

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

Medicare specialtyCOLORECTAL SURGERY (PROCTOLOGY)
Also practisesGENERAL SURGERY
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Texas Oncology Pa — 1005 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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