Shannon Duffy, MMSC, PA-C
NPI 1902577604 · Physician Assistant · Boulder, CO
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Shannon Duffy, MMSC, PA-C is a Physician Assistant provider in Boulder, CO (NPI 1902577604).
Provider details
- NPI number
- 1902577604
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MMSC, PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- 11447 (GA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
4 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clobetasol Propionate | 90 | 66 |
| Triamcinolone Acetonide | 48 | 39 |
| Nystatin/Triamcinolone Acetbrand: Nystatin-Triamcinolone | 22 | 16 |
| Doxycycline Hyclate | 20 | 16 |
| Ketoconazole | 20 | 11 |
| Dupilumabbrand: Dupixent Pen | 14 | — |
| Adalimumabbrand: Humira(cf) Pen | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$433 across 24 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-09-22
- Last updated
- 2025-08-13
- Certified
- 2025-08-13
Frequently asked questions
- What is Shannon Duffy's NPI number?
- Shannon Duffy's National Provider Identifier (NPI) is 1902577604, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Shannon Duffy's specialty?
- Shannon Duffy is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Shannon Duffy located?
- Shannon Duffy's practice location on file with NPPES is 2400 Spruce St Ste 101, Boulder, CO 80302-4716.
- What is Shannon Duffy's phone number?
- The practice phone number listed in the NPPES registry for Shannon Duffy is (404) 321-4600.
- Does Shannon Duffy accept Medicare?
- Shannon Duffy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Shannon Duffy's NPI active?
- Yes — Shannon Duffy's NPI (1902577604) is active in the NPPES registry as of the last update on 2025-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.