Tara A. Grieshaber, PA
NPI 1881337798ActiveIndividual· Physician Assistant· Golden, CO
Physician Assistant (PA) with Optumcare Colorado Medical Group LLC, practicing in Golden, Colorado. Their prescriptions cost Medicare Part D more than their services did: $67,709 for 1,488 claims, against $8,502 paid for services in 2024. Organon LLC reported $26.39 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1881337798 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | Apr 18, 2022 |
| Last updated in NPPES | Sep 24, 2026 |
| Certified by provider | Sep 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA.0007300 | CO |
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 - Physician Assistant (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 64 |
|---|---|
| Services billed | 105 across 19 procedure codes |
| Paid by Medicare | $8,502 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,488 · 3,715 30-day fills |
|---|---|
| Patients | 323 |
| Total drug cost | $67,709 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Optumcare Colorado Medical Group LLCDenver, CO · 182 clinicians
Industry payments (Open Payments)
- 2025$26.39 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Organon LLC | $26.39 | 1 |
What the 2025 payments were for
- Food and Beverage$26.39 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 115 physician assistants in Golden · All physician assistants in Colorado