John Grimm, M.D.
NPI 1164606604 · Diagnostic Radiology Physician · Charlotte, NC
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Grimm, M.D. is a Diagnostic Radiology Physician provider in Charlotte, NC (NPI 1164606604).
Provider details
- NPI number
- 1164606604
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A90306 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
18 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
2,020 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 | 680 | $38 |
| X-Ray of Chest, 1 View71045 | 316 | $8 |
| X-Ray of Chest, 2 Views71046 | 138 | $10 |
| Ct Scan of Blood Vessels of Head With Contrast70496 | 132 | $80 |
| Ct Scan of Blood Vessels of Neck With Contrast70498 | 128 | $76 |
| Mri Scan of Brain Without Contrast70551 | 109 | $67 |
| Mri Scan of Brain Before and After Contrast |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-12-19
- Last updated
- 2017-12-20
Frequently asked questions
- What is John Grimm's NPI number?
- John Grimm's National Provider Identifier (NPI) is 1164606604, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Grimm's specialty?
- John Grimm is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Grimm located?
- John Grimm's practice location on file with NPPES is 700 E Morehead St, Charlotte, NC 28202-2788.
- What is John Grimm's phone number?
- The practice phone number listed in the NPPES registry for John Grimm is (704) 334-7800.
- Does John Grimm accept Medicare?
- John Grimm is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Grimm's NPI active?
- Yes — John Grimm's NPI (1164606604) is active in the NPPES registry as of the last update on 2017-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.