John Merchun, MD
NPI 1851325971 · Diagnostic Radiology Physician · Greenville, MI
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Merchun, MD is a Diagnostic Radiology Physician provider in Greenville, MI (NPI 1851325971).
Provider details
- NPI number
- 1851325971
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301070097 (MI)
Specialties & taxonomies
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
2,649 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 543 | $8 |
| X-Ray of Chest, 2 Views71046 | 251 | $10 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 204 | $80 |
| Ct Scan of Chest Without Contrast71250 | 125 | $48 |
| Low Dose Ct Scan of Chest for Lung Cancer Screening71271 | 122 | $48 |
| Ct Scan of Chest With Contrast71260 | 103 | $50 |
| X-Ray of Abdomen, 1 View |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-11
- Last updated
- 2007-07-12
Frequently asked questions
- What is John Merchun's NPI number?
- John Merchun's National Provider Identifier (NPI) is 1851325971, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Merchun's specialty?
- John Merchun is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Merchun located?
- John Merchun's practice location on file with NPPES is 615 South Bower Street, Greenville, MI 48838.
- What is John Merchun's phone number?
- The practice phone number listed in the NPPES registry for John Merchun is (616) 754-4691.
- Does John Merchun accept Medicare?
- John Merchun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Merchun's NPI active?
- Yes — John Merchun's NPI (1851325971) is active in the NPPES registry as of the last update on 2007-07-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.