Quick answers
- Does Clifford L. Simmang accept Medicare assignment?
- Yes. Medicare's clinician data says Clifford L. Simmang accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Clifford L. Simmang see?
- In 2024, CMS data shows 203 Original Medicare patients and 485 services for Clifford L. Simmang. This counts Original Medicare only and measures volume, not quality.
- What is Clifford L. Simmang's NPI number?
- 1316972136. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Clifford L. Simmang, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 203 |
|---|---|
| Services billed to Medicare | 485 |
| Different services or procedures | 57 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)93 services
- Removal of external hemorrhoids by rubber banding (46221)44 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)40 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)26 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)26 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure71%
- Arthritis43%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)33%
- Ischemic heart disease31%
- Diabetes29%
Hospitals where Clifford L. Simmang works
Medicare's Facility Affiliation Data lists Clifford L. Simmang at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Baylor Scott & White Medical Center GrapevineGrapevine, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450563
Practice locations
Addresses where Clifford L. Simmang is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1600 W College St, Suite 440Grapevine, TX 76051 (817) 865‑6200
- 2026 S Jackson StJacksonville, TX 75766 (903) 586‑2456
- 4201 Brown Trl, Suite 101Colleyville, TX 76034 (682) 217‑2102
- 7777 Forest Ln, Suite A321Dallas, TX 75230 (972) 661‑3575
- 7777 Forest Ln, Suite C707Dallas, TX 75230 (972) 566‑3000
Group practices
Medicare enrollment lists Clifford L. Simmang as a member of this group (CMS data updated October 2, 2026).
- Texas Oncology PA1,014 clinicians in the group
Specialties
Find other Colorectal Surgery (Proctology) doctors in Texas →
Other colorectal surgeons in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Other clinicians in Texas Oncology PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical Branch At Galveston |
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1316972136 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians