John D. Blackman, MD
NPI 1174694749ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Columbus, OH
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) in Columbus, Ohio, licensed in OH, with an NPI issued in November 2006. Their prescriptions cost Medicare Part D more than their services did: $2,758,193 for 5,410 claims, against $51,270 paid for services in 2024. Insulet Corporation was the largest of 2 companies reporting payments in 2025, $72.61 in all, mostly food and beverage.
Overview
| NPI | 1174694749 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 13, 2006 |
| Last updated in NPPES | Mar 4, 2025 |
| Certified by provider | Mar 4, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 35054974 | OH |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 257 |
|---|---|
| Services billed | 919 across 12 procedure codes |
| Paid by Medicare | $51,270 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,410 · 12,695 30-day fills |
|---|---|
| Patients | 544 |
| Total drug cost | $2,758,193 |
| Generic share | 42% of claims |
Industry payments (Open Payments)
- 2025$72.61 · 2 payments from 2 companies
- 2024$295.63 · 7 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Insulet Corporation | $42.24 | 1 |
| Medtronic, Inc. | $30.37 | 1 |
What the 2025 payments were for
- Food and Beverage$72.61 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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