Gregory J. Hattan, MD
NPI 1396854204ActiveIndividual· Obstetrics & Gynecology· Lincoln, NE
Obstetrics & Gynecology (MD) in Lincoln, Nebraska, trained at University of Nebraska College of Medicine (class of 1991). Mostly services rather than prescriptions: Medicare paid $1,277 for 15 patients in 2024, with only 43 Part D claims. Astellas Pharma US Inc was the largest of 6 companies reporting payments in 2025, $217.73 in all, mostly food and beverage.
Overview
| NPI | 1396854204 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 30, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 18886 | NE |
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 - Obstetrics/Gynecology (NE) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 15 |
|---|---|
| Services billed | 22 across 10 procedure codes |
| Paid by Medicare | $1,277 |
Part D prescriptions in 2024
| Prescriptions (claims) | 43 · 74 30-day fills |
|---|---|
| Total drug cost | $1,064 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | University of Nebraska College of Medicine |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Bryan Physician NetworkLincoln, NE · 243 clinicians
Hospital affiliation
- Bryan Medical CenterLincoln, NE
Industry payments (Open Payments)
- 2025$217.73 · 9 payments from 6 companies
- 2024$500.71 · 22 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astellas Pharma US Inc | $137.10 | 4 |
| Sumitomo Pharma America, Inc. | $22.01 | 1 |
| Pacira Pharmaceuticals Incorporated | $16.65 | 1 |
| Hologic Sales and Service, LLC | $15.39 | 1 |
| Smith+nephew, Inc. | $13.79 | 1 |
What the 2025 payments were for
- Food and Beverage$217.73 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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