Sean Duffy, MD
NPI 1356785430 · Family Medicine Physician · Madison, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sean Duffy, MD is a Family Medicine Physician provider in Madison, WI (NPI 1356785430).
Provider details
- NPI number
- 1356785430
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
15 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 15 | $9 |
Typical Medicare-allowed amounts for these services range $9–$9 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 79 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 157 | 37 |
| Rosuvastatin Calcium | 86 | 19 |
| Metoprolol Succinate | 85 | 11 |
| Amlodipine Besylate | 83 | 22 |
| Oxycodone Hcl | 80 | 11 |
| Omeprazole | 65 | 19 |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-19
- Last updated
- 2021-02-08
- Certified
- 2021-02-08
Frequently asked questions
- What is Sean Duffy's NPI number?
- Sean Duffy's National Provider Identifier (NPI) is 1356785430, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sean Duffy's specialty?
- Sean Duffy is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sean Duffy located?
- Sean Duffy's practice location on file with NPPES is 1102 S Park St, Madison, WI 53715-1708.
- What is Sean Duffy's phone number?
- The practice phone number listed in the NPPES registry for Sean Duffy is (608) 263-3111.
- Does Sean Duffy accept Medicare?
- Sean Duffy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sean Duffy's NPI active?
- Yes — Sean Duffy's NPI (1356785430) is active in the NPPES registry as of the last update on 2021-02-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.