Jonathan Ellis Welker, PA-C
NPI 1770812588ActiveIndividual· Physician Assistant, Medical· Boulder, CO
Physician Assistant, Medical (PA-C) with Boulder Community Health, practicing in Boulder, Colorado. Their prescriptions cost Medicare Part D more than their services did: $877,697 for 1,872 claims, against $41,259 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 2 companies reporting payments in 2025, $248.39 in all, mostly food and beverage. Lists Boulder Community Health as a hospital affiliation.
Overview
| NPI | 1770812588 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Dec 8, 2009 |
| Last updated in NPPES | Sep 29, 2022 |
| Certified by provider | Sep 29, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | PA.0002934 | 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 | 234 |
|---|---|
| Services billed | 3,918 across 8 procedure codes |
| Paid by Medicare | $41,259 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,872 · 3,666 30-day fills |
|---|---|
| Patients | 311 |
| Total drug cost | $877,697 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Boulder Community HealthBoise, ID · 264 clinicians
Hospital affiliation
- Boulder Community HealthBoulder, CO
Industry payments (Open Payments)
- 2025$248.39 · 6 payments from 2 companies
- 2024$13.26 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $140.57 | 5 |
| Emd Serono, Inc. | $107.82 | 1 |
What the 2025 payments were for
- Food and Beverage$248.39 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 27 physician assistants in Boulder · All physician assistants in Colorado