Seda Grigoryan, MD
NPI 1881180511ActiveIndividual· Internal Medicine· Chattanooga, TN
Internal Medicine (MD) with David M. Huffman, M.D.,p.C., practicing in Chattanooga, Tennessee. Their prescriptions cost Medicare Part D more than their services did: $274,993 for 403 claims, against $7,989 paid for services in 2024. Insulet Corporation was the largest of 25 companies reporting payments in 2025, $2,415 in all, mostly food and beverage.
Overview
| NPI | 1881180511 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 5, 2018 |
| Last updated in NPPES | Nov 5, 2025 |
| Certified by provider | Nov 5, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 69457 | TN |
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 - Endocrinology (MI); Practitioner - Endocrinology (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 56 |
|---|---|
| Services billed | 175 across 15 procedure codes |
| Paid by Medicare | $7,989 |
Part D prescriptions in 2024
| Prescriptions (claims) | 403 · 858 30-day fills |
|---|---|
| Patients | 101 |
| Total drug cost | $274,993 |
| Generic share | 30% of claims |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Medical group
- David M. Huffman, M.D.,p.C.Chattanooga, TN · 5 clinicians
Industry payments (Open Payments)
- 2025$2,415 · 132 payments from 25 companies
- 2024$1,367 · 72 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Insulet Corporation | $312.93 | 27 |
| Sequel Med Tech, LLC | $226.24 | 9 |
| Cequr Corporation | $218.18 | 15 |
| Amgen Inc. | $203.37 | 6 |
| Novo Nordisk Inc | $196.83 | 11 |
What the 2025 payments were for
- Food and Beverage$2,415 · 132 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 240 internal medicine physicians in Chattanooga · All internal medicine physicians in Tennessee