David Irizarry, MD
NPI 1518282839ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Knoxville, TN
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) with Endocrinology Consultants of East Tn, practicing in Knoxville, Tennessee. Their prescriptions cost Medicare Part D more than their services did: $709,580 for 1,999 claims, against $35,455 paid for services in 2024. Novo Nordisk Inc was the largest of 25 companies reporting payments in 2025, $18,722 in all, mostly speaking and faculty fees. Lists Blount Memorial Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1518282839 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 30, 2010 |
| Last updated in NPPES | Mar 31, 2025 |
| Certified by provider | Mar 31, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | MD58106 | 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 (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 167 |
|---|---|
| Services billed | 675 across 11 procedure codes |
| Paid by Medicare | $35,455 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,999 · 4,929 30-day fills |
|---|---|
| Patients | 329 |
| Total drug cost | $709,580 |
| Generic share | 53% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Endocrinology |
Medical group
- Endocrinology Consultants of East TnKnoxville, TN · 37 clinicians
Hospital affiliations
- Blount Memorial HospitalMaryville, TN
- Parkwest Medical CenterKnoxville, TN
- University Health System, IncKnoxville, TN
Industry payments (Open Payments)
- 2025$18,722 · 126 payments from 25 companies
- 2024$9,624 · 85 payments from 25 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $16,989 | 24 |
| Dexcom, Inc. | $195.28 | 10 |
| Insulet Corporation | $170.37 | 12 |
| Xeris Pharmaceuticals, Inc. | $164.48 | 8 |
| Neurocrine Biosciences, Inc. | $155.38 | 7 |
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$15,066 · 5 payments
- Food and Beverage$2,204 · 115 payments
- Travel and Lodging$1,453 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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