John Clarke, MD
NPI 1689888422 · Diagnostic Radiology Physician · Massillon, OH
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Clarke, MD is a Diagnostic Radiology Physician provider in Massillon, OH (NPI 1689888422).
Provider details
- NPI number
- 1689888422
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 35.144215 (OH)
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
2,367 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) |
|---|---|---|
| Ct Scan Head Or Brain Without Contrast70450 | 753 | $39 |
| Ct Scan of Upper Spine Without Contrast72125 | 376 | $47 |
| X-Ray of Chest, 1 View71045 | 112 | $8 |
| Ct Scan of Blood Vessels of Neck With Contrast70498 | 94 | $78 |
| Ct Scan of Blood Vessels of Head With Contrast70496 | 92 | $82 |
| Ct Scan of Lower Spine Without Contrast72131 | 89 | $45 |
| X-Ray of Shoulder, Minimum of 2 Views73030 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-10
- Last updated
- 2026-05-28
- Certified
- 2026-05-28
Frequently asked questions
- What is John Clarke's NPI number?
- John Clarke's National Provider Identifier (NPI) is 1689888422, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Clarke's specialty?
- John Clarke is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Clarke located?
- John Clarke's practice location on file with NPPES is 8012 Glendevan St Nw, Massillon, OH 44646-9017.
- What is John Clarke's phone number?
- The practice phone number listed in the NPPES registry for John Clarke is (504) 717-9733.
- Does John Clarke accept Medicare?
- John Clarke is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Clarke's NPI active?
- Yes — John Clarke's NPI (1689888422) is active in the NPPES registry as of the last update on 2026-05-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.