Denise Smith Johnson, PA-C
NPI 1124226147ActiveIndividual· Physician Assistant· Waldorf, MD
Physician Assistant (PA-C) with Asthma Allergy and Sinus Center, LLC, practicing in Waldorf, Maryland. Their prescriptions cost Medicare Part D more than their services did: $161,142 for 532 claims, against $31,324 paid for services in 2024. Genzyme Corporation was the largest of 15 companies reporting payments in 2025, $1,723 in all, mostly food and beverage.
Overview
| NPI | 1124226147 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Jul 11, 2007 |
| Last updated in NPPES | Jun 18, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | C0002293 | MD |
| Physician Assistant | 363A00000X | PA30173 | DC |
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 (DC); Practitioner - Physician Assistant (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 118 |
|---|---|
| Services billed | 4,803 across 16 procedure codes |
| Paid by Medicare | $31,324 |
Part D prescriptions in 2024
| Prescriptions (claims) | 532 · 895 30-day fills |
|---|---|
| Patients | 99 |
| Total drug cost | $161,142 |
| Generic share | 72% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Asthma Allergy and Sinus Center, LLCWaldorf, MD · 2 clinicians
Industry payments (Open Payments)
- 2025$1,723 · 69 payments from 15 companies
- 2024$1,952 · 79 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $355.15 | 13 |
| Astrazeneca Pharmaceuticals LP | $349.19 | 18 |
| Pfizer Inc. | $198.26 | 8 |
| Genentech USA, Inc. | $128.98 | 4 |
| Takeda Pharmaceuticals U.S.A., Inc. | $113.46 | 4 |
What the 2025 payments were for
- Food and Beverage$1,723 · 69 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 27 physician assistants in Waldorf · All physician assistants in Maryland