Shannon Johnstad, PA
NPI 1285391821ActiveIndividual· Physician Assistant· Thornton, CO
Physician Assistant (PA) with Ch Mssp Services Co LLC, practicing in Thornton, Colorado. 54 Medicare patients in 2024, $14,908,018 paid; all of their 57 Part D prescriptions were generic.
Overview
| NPI | 1285391821 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | Nov 18, 2021 |
| Last updated in NPPES | Jan 17, 2022 |
| Certified by provider | Jan 17, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 1192657 | CO |
| Physician Assistant, Medical | 363AM0700X | PA.0007121 | CO |
| Physician Assistant, Medical | 363AM0700X | — | — |
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); Practitioner - Physician Assistant (WY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 54 |
|---|---|
| Services billed | 12,930 across 26 procedure codes |
| Paid by Medicare | $14,908,018 |
Part D prescriptions in 2024
| Prescriptions (claims) | 57 · 57 30-day fills |
|---|---|
| Patients | 21 |
| Total drug cost | $680.52 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Ch Mssp Services Co LLCCentennial, CO · 16 clinicians
Other facilities
- Home Health DenverHome health agency · Centennial, CO
- Suites at Holly Creek Care Center, theNursing home · Centennial, CO
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 60 physician assistants in Thornton · All physician assistants in Colorado