John Duff, MD
NPI 1225125222 · Family Medicine Physician · Midland, MI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Duff, MD is a Family Medicine Physician provider in Midland, MI (NPI 1225125222).
Provider details
- NPI number
- 1225125222
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- JD088515 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
130 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) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 97 | $117 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 33 | $64 |
Typical Medicare-allowed amounts for these services range $64–$117 (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 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 48 | 45 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 47 | 45 |
| Ondansetron Hcl | 38 | 37 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 20 | 20 |
| Cyclobenzaprine Hcl | 16 | 15 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 15 | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-10
- Last updated
- 2011-04-18
Frequently asked questions
- What is John Duff's NPI number?
- John Duff's National Provider Identifier (NPI) is 1225125222, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Duff's specialty?
- John Duff is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Duff located?
- John Duff's practice location on file with NPPES is 2213 Dilloway Dr, Midland, MI 48640-6767.
- What is John Duff's phone number?
- The practice phone number listed in the NPPES registry for John Duff is (989) 493-3882.
- Does John Duff accept Medicare?
- John Duff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Duff's NPI active?
- Yes — John Duff's NPI (1225125222) is active in the NPPES registry as of the last update on 2011-04-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.