Maria Cristina Espera Caga-Anan, M.D.
NPI 1992002778ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Amarillo, TX
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) with Amarillo Medical Specialists,llp, practicing in Amarillo, Texas. Their prescriptions cost Medicare Part D more than their services did: $929,201 for 2,295 claims, against $299,173 paid for services in 2024. Sanofi-Aventis U.S. LLC was the largest of 22 companies reporting payments in 2025, $1,164 in all, mostly food and beverage. Lists Bsa Hospital as a hospital affiliation.
Overview
| NPI | 1992002778 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Feb 14, 2011 |
| Last updated in NPPES | Aug 20, 2026 |
| Certified by provider | Aug 20, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | P7403 | TX |
| Internal Medicine | 207R00000X | P7403 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 564 |
|---|---|
| Services billed | 12,501 across 71 procedure codes |
| Paid by Medicare | $299,173 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,295 · 4,502 30-day fills |
|---|---|
| Patients | 448 |
| Total drug cost | $929,201 |
| Generic share | 38% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Medical group
- Amarillo Medical Specialists,llpAmarillo, TX · 42 clinicians
Hospital affiliation
- Bsa HospitalAmarillo, TX
Industry payments (Open Payments)
- 2025$1,164 · 50 payments from 22 companies
- 2024$1,066 · 50 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Sanofi-Aventis U.S. LLC | $112.95 | 4 |
| Chiesi USA, Inc. | $105.81 | 3 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $93.53 | 5 |
| Novo Nordisk Inc | $90.17 | 5 |
| Amgen Inc. | $78.36 | 3 |
What the 2025 payments were for
- Food and Beverage$1,098 · 49 payments
- Education$65.97 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Endocrinology, Diabetes & Metabolism providers in Amarillo
- 1942393871
- 1033280862
- 1255408936
- 1295819720
- 1992879563
- 1467484667
- 1457397697
All Internal Medicine, Endocrinology, Diabetes & Metabolism providers in Texas →