Theodoros Voloyiannis, M.D.
Colon & Rectal Surgery Physician · Houston, TX
Theodoros Voloyiannis, M.D. is a colon & rectal surgery physician with a practice address in Houston, Texas, and NPI 1891911228, issued on Apr 17, 2007. Check the license (Texas M2858, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Theodoros Voloyiannis
- Credential
- M.D.
- Primary taxonomy
- Colon & Rectal Surgery Physician 208C00000X
- License number
- M2858 TX
Self-reported in NPPES; status is on the state search - Practice location
- 7400 Fannin St Ste 1295, Houston, TX 77054
- Phone
- (832) 377-3770
- Enumerated
- Apr 17, 2007
- Record last updated
- Apr 15, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (713) 341-1574
- Medicaid IDs
- 199815507 TX
199815508 TX - Medicare enrollment
- Enrolled (PECOS I20071129000729); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest colon & rectal surgery physician records → All 209 in Texas → Look up another NPI →
Also registered at 7400 Fannin St Ste 1295
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Sasaki, M.D.Surgical Oncology Physician1467718775
- Celestine Tung, MDGynecologic Oncology Physician1366620916
Verify Theodoros Voloyiannis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license M2858Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average colon & rectal surgery physician in 2024
441 Medicare Part D claims for 165 beneficiaries, against an average of 192 among the 1,836 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 102 claims were for opioids.
Most prescribed
- Metronidazole98 claims
- Hydrocodone-Acetaminophen77 claims
- Neomycin Sulfate72 claims
- Clenpiq50 claims
- Sod Sulf-Potass Sulf-Mag Sulf29 claims
- Tramadol Hcl18 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 89.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $32,644.21
24 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 1,524 providers of this specialty with any payment received $3,468.16 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Texas Oncology PAWebster, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Theodoros Voloyiannis among 209 colon & rectal surgery physician records in Texas
Theodoros Voloyiannis, M.D. is one of 209 colon & rectal surgery physician records with a practice address in Texas. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 43% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 84% of these records are
- Graduated1998 · median 2004 among the 174 with a school on file
- Record last updated2019 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208C00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Colon & Rectal Surgery Physician providers in Texas
There are 209 colon & rectal surgery physician records in Texas.
All 209 in Texas → Every provider in Houston → Colon & Rectal Surgery Physician nationwide →
The 8 colon & rectal surgery physician records with the nearest ZIP codes
- Punam Amin, MDHouston, TX 770541861824062
- Diego Marines Copado, M.D.Houston, TX 770701588891659
- Aakash Gajjar, M.D.Houston, TX 770741730115106
- Anne Le, M.D.Houston, TX 770741679787808
- Erik Askenasy, M.D.Houston, TX 770301780813295
- Steven Capece, M.D.Houston, TX 770301629638291
- Joshua Coursey, M.D.Houston, TX 770301184944019
- Kelly Gilmore, MDHouston, TX 770301962697417
Common questions
What is Theodoros Voloyiannis, M.D.'s NPI number?
Theodoros Voloyiannis, M.D.'s National Provider Identifier (NPI) is 1891911228, issued on Apr 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Theodoros Voloyiannis, M.D. located?
The NPPES record lists a practice address at 7400 Fannin St Ste 1295, Houston, TX, 77054. Phone: (832) 377-3770. Providers update this record themselves, so call before visiting.
How can I verify Theodoros Voloyiannis, M.D.'s license?
NPPES lists Texas license number M2858, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Theodoros Voloyiannis, M.D. prescribe under Medicare Part D?
In 2024, Theodoros Voloyiannis, M.D. had 441 Medicare Part D claims for 165 beneficiaries; the average among colon & rectal surgery physician prescribers was 192. Part D covers Medicare prescriptions only.
What is Theodoros Voloyiannis, M.D.'s MIPS final score?
The 2023 MIPS final score is 89.4 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.