John Duhn, DO
NPI 1821043613 · Family Medicine Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Duhn, DO is a Family Medicine Physician provider in Grand Rapids, MI (NPI 1821043613).
Provider details
- NPI number
- 1821043613
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 5101015743 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
346 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 175 | $122 |
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 130 | $73 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians andG0180 | 17 | $50 |
| Administration of Influenza Virus VaccineG0008 | 13 | $31 |
| Residence Visit for New Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99344 | 11 | $136 |
Typical Medicare-allowed amounts for these services range $31–$136 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 82 | 37 |
| Levothyroxine Sodium | 68 | 24 |
| Gabapentin | 47 | 17 |
| Omeprazole | 44 | 19 |
| Amlodipine Besylate | 40 | 14 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 37 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 across 1 record (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
Additional practice locations (1)
- 4868-2 Lake Michigan DrAllendale, MI 49401-7415Phone: (616) 391-2800Fax: (616) 391-7709
Registry dates
- Enumerated
- 2006-05-23
- Last updated
- 2024-04-23
- Certified
- 2024-04-23
Frequently asked questions
- What is John Duhn's NPI number?
- John Duhn's National Provider Identifier (NPI) is 1821043613, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Duhn's specialty?
- John Duhn is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Duhn located?
- John Duhn's practice location on file with NPPES is 3355 Eagle Park Dr Ne Ste 103, Grand Rapids, MI 49525-7004.
- What is John Duhn's phone number?
- The practice phone number listed in the NPPES registry for John Duhn is (616) 942-7400.
- Does John Duhn accept Medicare?
- John Duhn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Duhn's NPI active?
- Yes — John Duhn's NPI (1821043613) is active in the NPPES registry as of the last update on 2024-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.