John Duffy, MD
NPI 1861997025 · Hospitalist Physician · Minneapolis, MN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Duffy, MD is a Hospitalist Physician provider in Minneapolis, MN (NPI 1861997025).
Provider details
- NPI number
- 1861997025
- Entity type
- Individual
- Primary specialty
- Hospitalist 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
8 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
162 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 56 | $73 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 51 | $110 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 36 | $107 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 19 | $161 |
Typical Medicare-allowed amounts for these services range $73–$161 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-03-28
- Last updated
- 2022-06-28
- Certified
- 2022-06-28
Frequently asked questions
- What is John Duffy's NPI number?
- John Duffy's National Provider Identifier (NPI) is 1861997025, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Duffy's specialty?
- John Duffy is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is John Duffy located?
- John Duffy's practice location on file with NPPES is 420 Delaware St Se, Minneapolis, MN 55455-0341.
- What is John Duffy's phone number?
- The practice phone number listed in the NPPES registry for John Duffy is (612) 625-0990.
- Does John Duffy accept Medicare?
- John Duffy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Duffy's NPI active?
- Yes — John Duffy's NPI (1861997025) is active in the NPPES registry as of the last update on 2022-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.