Carl G. Chakmakjian, D.O.
NPI 1285675306ActiveIndividual· Internal Medicine, Medical Oncology· Waco, TX
Internal Medicine, Medical Oncology (D.O.) in Waco, Texas, trained at University of North Texas Hsc, College of Osteopathic Med (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $3,893,516 for 1,584 claims, against $1,958,929 paid for services in 2024. E.R. Squibb & Sons, L.L.C. was the largest of 17 companies reporting payments in 2025, $56,773 in all, mostly speaking and faculty fees.
Overview
| NPI | 1285675306 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jun 9, 2006 |
| Last updated in NPPES | Feb 18, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | L4879 | 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 - Medical Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 604 |
|---|---|
| Services billed | 92,990 across 132 procedure codes |
| Paid by Medicare | $1,958,929 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,584 · 2,233 30-day fills |
|---|---|
| Patients | 272 |
| Total drug cost | $3,893,516 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | University of North Texas Hsc, College of Osteopathic Med |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Texas Oncology PAPlano, TX · 1,014 clinicians
Hospital affiliations
- Ascension ProvidenceWaco, TX
- Coryell Memorial HospitalGatesville, TX
- Freestone Medical CenterFairfield, TX
- Limestone Medical CenterGroesbeck, TX
- Parkview Regional HospitalMexia, TX
Industry payments (Open Payments)
- 2025$56,773 · 46 payments from 17 companies
- 2024$24,851 · 48 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $56,208 | 24 |
| Novartis Pharmaceuticals Corporation | $83.91 | 3 |
| Pfizer Inc. | $66.32 | 3 |
| Merck Sharp & Dohme LLC | $56.37 | 2 |
| Astellas Pharma US Inc | $50.74 | 2 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$42,953 · 5 payments
- Consulting Fee$9,834 · 7 payments
- Travel and Lodging$3,123 · 7 payments
- Food and Beverage$842.55 · 26 payments
- Education$20.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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