John Winn, M.D.
NPI 1871795500 · Diagnostic Radiology Physician · Carmichael, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Winn, M.D. is a Diagnostic Radiology Physician provider in Carmichael, CA (NPI 1871795500).
Provider details
- NPI number
- 1871795500
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A99180 (CA)
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
3,482 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 | 758 | $9 |
| Ct Scan Head Or Brain Without Contrast70450 | 283 | $41 |
| Mri Scan of Brain Without Contrast70551 | 283 | $73 |
| Ct Scan of Blood Vessels of Neck With Contrast70498 | 224 | $83 |
| Ct Scan of Blood Vessels of Head With Contrast70496 | 216 | $86 |
| X-Ray of Chest, 2 Views71046 | 141 | $11 |
| Ct Scan of Abdomen and Pelvis With Contrast |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-04
- Last updated
- 2020-04-13
- Certified
- 2020-04-13
Frequently asked questions
- What is John Winn's NPI number?
- John Winn's National Provider Identifier (NPI) is 1871795500, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Winn's specialty?
- John Winn is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Winn located?
- John Winn's practice location on file with NPPES is 6305 Coyle Ave, Carmichael, CA 95608-0438.
- What is John Winn's phone number?
- The practice phone number listed in the NPPES registry for John Winn is (916) 961-6120.
- Does John Winn accept Medicare?
- John Winn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Winn's NPI active?
- Yes — John Winn's NPI (1871795500) is active in the NPPES registry as of the last update on 2020-04-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.