Nathaniel Timothy Jest, D.O.
NPI 1053671982ActiveIndividual· Internal Medicine, Gastroenterology· Milwaukee, WI
Internal Medicine, Gastroenterology (D.O.) with Gi Associates LLC and 2 other groups, practicing in Milwaukee, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $399,162 for 1,189 claims, against $33,379 paid for services in 2024. Cook Medical LLC was the largest of 2 companies reporting payments in 2024, $147.56 in all, mostly food and beverage. Lists Ascension Se Wisconsin Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1053671982 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | May 25, 2012 |
| Last updated in NPPES | Jan 26, 2026 |
| Certified by provider | Jan 26, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 71167-21 | WI |
| Internal Medicine | 207R00000X | UO3052 | FL |
| Internal Medicine | 207R00000X | 71167-21 | WI |
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 - Gastroenterology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 205 |
|---|---|
| Services billed | 368 across 29 procedure codes |
| Paid by Medicare | $33,379 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,189 · 1,735 30-day fills |
|---|---|
| Patients | 446 |
| Total drug cost | $399,162 |
| Generic share | 77% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical groups
- Gi Associates LLCMilwaukee, WI · 55 clinicians
- Gastroenterology Specialists SCWauwatosa, WI · 30 clinicians
- Milwaukee Gi Specialists SCWauwatosa, WI · 15 clinicians
Hospital affiliations
- Ascension Se Wisconsin HospitalMilwaukee, WI
- Oconomowoc Memorial HospitalOconomowoc, WI
- Waukesha Memorial HospitalWaukesha, WI
Industry payments (Open Payments)
- 2024$147.56 · 2 payments from 2 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Cook Medical LLC | $117.16 | 1 |
| Pfizer Inc. | $30.40 | 1 |
What the 2024 payments were for
- Food and Beverage$117.16 · 1 payment
- Education$30.40 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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