Jonathan Wynn Hemmert, MD
NPI 1588827455ActiveIndividual· Emergency Medicine· Houston, TX
Emergency Medicine (MD) in Houston, Texas, trained at University of Chicago, Pritzker School of Medicine (class of 2008). 45 Medicare patients in 2024, $4,228 paid; nearly all of their 130 Part D prescriptions were generic (92%). Pfizer Inc. reported $20.18 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1588827455 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jul 9, 2008 |
| Last updated in NPPES | Apr 20, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | N8791 | TX |
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 - Emergency Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 45 |
|---|---|
| Services billed | 83 across 23 procedure codes |
| Paid by Medicare | $4,228 |
Part D prescriptions in 2024
| Prescriptions (claims) | 130 · 131 30-day fills |
|---|---|
| Patients | 70 |
| Total drug cost | $936.61 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | University of Chicago, Pritzker School of Medicine |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Emergency Medicine |
Medical groups
- Houston ER Physicians, LLCHouston, TX · 11 clinicians
- Rayford ER Group PLLCSpring, TX · 10 clinicians
Industry payments (Open Payments)
- 2025$20.18 · 1 payment from 1 company
- 2024$14.55 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $20.18 | 1 |
What the 2025 payments were for
- Food and Beverage$20.18 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 953 emergency medicine physicians in Houston · All emergency medicine physicians in Texas