Clifford L. Simmang, MD
NPI 1316972136ActiveIndividual· Colon & Rectal Surgery· Dallas, TX
Colon & Rectal Surgery (MD) in Dallas, Texas, trained at University of Texas Medical Branch at Galveston (class of 1982). 203 Medicare patients in 2024, $104,794 paid; nearly all of their 225 Part D prescriptions were generic (94%). Intuitive Surgical, Inc. was the largest of 3 companies reporting payments in 2025, $208.01 in all, mostly food and beverage.
Overview
| NPI | 1316972136 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 11, 2006 |
| Last updated in NPPES | Oct 13, 2020 |
| Certified by provider | Oct 13, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Colon & Rectal Surgery Primary | 208C00000X | G4245 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Colorectal Surgery (Proctology) (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 203 |
|---|---|
| Services billed | 485 across 57 procedure codes |
| Paid by Medicare | $104,794 |
Part D prescriptions in 2024
| Prescriptions (claims) | 225 · 245 30-day fills |
|---|---|
| Patients | 68 |
| Total drug cost | $21,008 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | University of Texas Medical Branch at Galveston |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Colorectal Surgery (Proctology) |
| Secondary specialties | General Surgery |
| Telehealth | Offers telehealth |
Medical group
- Texas Oncology PAPlano, TX · 1,014 clinicians
Hospital affiliation
- Baylor Scott & White Medical Center GrapevineGrapevine, TX
Other facilities
- Encompass Home Health of DfwHome health agency · Grapevine, TX
- Baylor Scott & White Institute for RehabilitationInpatient rehabilitation facility · Dallas, TX
Industry payments (Open Payments)
- 2025$208.01 · 5 payments from 3 companies
- 2024$284.64 · 5 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $109.73 | 1 |
| Ethicon US, LLC | $71.47 | 3 |
| Boston Scientific Corporation | $26.81 | 1 |
What the 2025 payments were for
- Food and Beverage$208.01 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 38 colorectal surgeons in Dallas · All colorectal surgeons in Texas