Isaac J. Klostermann, PA-C
NPI 1386996080ActiveIndividual· Physician Assistant· Montrose, CO
Physician Assistant (PA-C) in Montrose, Colorado, trained at University of Colorado School of Medicine, Denver (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $456,712 for 3,766 claims, against $36,210 paid for services in 2024. Abbvie Inc. was the largest of 11 companies reporting payments in 2025, $379.50 in all, mostly food and beverage.
Overview
| NPI | 1386996080 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Oct 5, 2012 |
| Last updated in NPPES | Apr 20, 2026 |
| Certified by provider | Apr 20, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA.0003531 | 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 | 191 |
|---|---|
| Services billed | 1,165 across 57 procedure codes |
| Paid by Medicare | $36,210 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,766 · 7,173 30-day fills |
|---|---|
| Patients | 295 |
| Total drug cost | $456,712 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | University of Colorado School of Medicine, Denver |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical groups
- Olathe Community ClinicMontrose, CO · 25 clinicians
- Peak Family Medicine LLCMontrose, CO · 16 clinicians
Hospital affiliation
- Montrose Regional HealthMontrose, CO
Industry payments (Open Payments)
- 2025$379.50 · 16 payments from 11 companies
- 2024$474.72 · 25 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $108.48 | 5 |
| Medtronic, Inc. | $47.20 | 1 |
| Otsuka America Pharmaceutical, Inc. | $45.65 | 2 |
| Boston Scientific Corporation | $38.34 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $25.87 | 1 |
What the 2025 payments were for
- Food and Beverage$379.50 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 22 physician assistants in Montrose · All physician assistants in Colorado