Kalyan Chakravarthy Vunnamadala, M.D.
NPI 1609991207ActiveIndividual· Thoracic Surgery (Cardiothoracic Vascular Surgery)· Tulsa, OK
Thoracic Surgery (Cardiothoracic Vascular Surgery) (M.D.) with St. John Physicians, Inc. and 1 other group, practicing in Tulsa, Oklahoma. Mostly services rather than prescriptions: Medicare paid $247,791 for 177 patients in 2024, with only 18 Part D claims. Depuy Synthes Sales Inc. was the largest of 10 companies reporting payments in 2025, $1,482 in all, mostly food and beverage. Lists Ascension St John Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1609991207 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 20, 2007 |
| Last updated in NPPES | Jan 13, 2025 |
| Certified by provider | Jan 13, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Thoracic Surgery (Cardiothoracic Vascular Surgery) Primary | 208G00000X | 44780 | OK |
| Thoracic Surgery (Cardiothoracic Vascular Surgery) | 208G00000X | MD-42919 | IA |
| Thoracic Surgery (Cardiothoracic Vascular Surgery) | 208G00000X | 73347 | AZ |
| Thoracic Surgery (Cardiothoracic Vascular Surgery) | 208G00000X | 12011 | SD |
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 - Thoracic Surgery (NM); Practitioner - Thoracic Surgery (OK); Practitioner - Thoracic Surgery (SD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 177 |
|---|---|
| Services billed | 504 across 52 procedure codes |
| Paid by Medicare | $247,791 |
Part D prescriptions in 2024
| Prescriptions (claims) | 18 · 19 30-day fills |
|---|---|
| Total drug cost | $129.47 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Thoracic Surgery |
Medical groups
- St. John Physicians, Inc.Tulsa, OK · 259 clinicians
- Las Cruces Physician Practices, LLCLas Cruces, NM · 109 clinicians
Hospital affiliations
- Ascension St John Medical CenterTulsa, OK
- Memorial Medical CenterLas Cruces, NM
Industry payments (Open Payments)
- 2025$1,482 · 33 payments from 10 companies
- 2024$223.87 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Depuy Synthes Sales Inc. | $651.60 | 16 |
| Abiomed | $370.65 | 4 |
| Medtronic, Inc. | $160.02 | 3 |
| Atricure, Inc. | $138.41 | 3 |
| Surmodics, Inc. | $47.44 | 2 |
What the 2025 payments were for
- Food and Beverage$1,482 · 33 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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