John-Paul Grenier, M.D.
NPI 1366977092 · Diagnostic Radiology Physician · New York, NY
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John-Paul Grenier, M.D. is a Diagnostic Radiology Physician provider in New York, NY (NPI 1366977092).
Provider details
- NPI number
- 1366977092
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2085R0202X (LA)
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
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,992 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 | 352 | $42 |
| X-Ray of Chest, 1 View71045 | 325 | $9 |
| X-Ray of Chest, 2 Views71046 | 202 | $11 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 166 | $92 |
| Ct Scan of Upper Spine Without Contrast72125 | 120 | $51 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 93 | $92 |
| Ct Scan of Blood Vessels of Neck With Contrast |
Practice location
Mailing address
Additional practice locations (1)
- 800 Old Metairie DrMetairie, LA 70001-6095Phone: (225) 610-6520
Registry dates
- Enumerated
- 2017-05-01
- Last updated
- 2024-09-26
- Certified
- 2024-09-26
Frequently asked questions
- What is John-Paul Grenier's NPI number?
- John-Paul Grenier's National Provider Identifier (NPI) is 1366977092, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John-Paul Grenier's specialty?
- John-Paul Grenier is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John-Paul Grenier located?
- John-Paul Grenier's practice location on file with NPPES is 1468 Madison Ave, New York, NY 10029-6508.
- What is John-Paul Grenier's phone number?
- The practice phone number listed in the NPPES registry for John-Paul Grenier is (212) 241-6500.
- Does John-Paul Grenier accept Medicare?
- John-Paul Grenier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John-Paul Grenier's NPI active?
- Yes — John-Paul Grenier's NPI (1366977092) is active in the NPPES registry as of the last update on 2024-09-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.