Carl D. Anderton, M.D.
NPI 1912999871ActiveIndividual· Internal Medicine· San Angelo, TX
Internal Medicine (M.D.) with Shannon Clinic and 1 other group, practicing in San Angelo, Texas. Their prescriptions cost Medicare Part D more than their services did: $1,067,770 for 12,309 claims, against $180,984 paid for services in 2024. Pfizer Inc. was the largest of 4 companies reporting payments in 2025, $122.03 in all, mostly food and beverage. Lists Ballinger Memorial Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1912999871 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 17, 2005 |
| Last updated in NPPES | Mar 22, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | H6998 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 438 |
|---|---|
| Services billed | 6,777 across 72 procedure codes |
| Paid by Medicare | $180,984 |
Part D prescriptions in 2024
| Prescriptions (claims) | 12,309 · 26,586 30-day fills |
|---|---|
| Patients | 552 |
| Total drug cost | $1,067,770 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical groups
- Shannon ClinicSan Angelo, TX · 559 clinicians
- The West Texas Rehabilitation CenterSan Angelo, TX · 466 clinicians
Hospital affiliations
- Ballinger Memorial HospitalBallinger, TX
- Shannon Medical CenterSan Angelo, TX
Other facilities
- Angels Care Home Health of San AngeloHome health agency · San Angelo, TX
- Centerwell Home HealthHome health agency · Eastland, TX
- Home Preferred Senior CareHome health agency · San Angelo, TX
- Paradigm Home HealthHome health agency · San Angelo, TX
- Shannon Home Health ServicesHome health agency · San Angelo, TX
- GentivaHospice · San Angelo, TX
- Hospice of San AngeloHospice · San Angelo, TX
Industry payments (Open Payments)
- 2025$122.03 · 6 payments from 4 companies
- 2024$33.51 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $58.72 | 3 |
| Lilly USA, LLC | $22.80 | 1 |
| E.R. Squibb & Sons, L.L.C. | $21.64 | 1 |
| Amgen Inc. | $18.87 | 1 |
What the 2025 payments were for
- Food and Beverage$122.03 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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