John Gundzik, M.D.
NPI 1659390995 · Diagnostic Radiology Physician · Bakersfield, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Gundzik, M.D. is a Diagnostic Radiology Physician provider in Bakersfield, CA (NPI 1659390995).
Provider details
- NPI number
- 1659390995
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A51755 (CA)
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
2,646 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) |
|---|---|---|
| Mri Scan of Brain Without Contrast70551 | 374 | $209 |
| Mri Scan of Lower Spinal Canal Without Contrast72148 | 224 | $200 |
| Mri Scan of Upper Spinal Canal Without Contrast72141 | 199 | $185 |
| Nuclear Medicine Study Limited Area With Ct Scan78814 | 156 | $1,784 |
| Ct Scan Head Or Brain Without Contrast70450 | 153 | $111 |
| Mri Scan of Brain Before and After Contrast70553 | 146 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-18
- Last updated
- 2011-08-16
Frequently asked questions
- What is John Gundzik's NPI number?
- John Gundzik's National Provider Identifier (NPI) is 1659390995, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Gundzik's specialty?
- John Gundzik is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Gundzik located?
- John Gundzik's practice location on file with NPPES is 2301 Bahamas Dr, Bakersfield, CA 93309-0663.
- What is John Gundzik's phone number?
- The practice phone number listed in the NPPES registry for John Gundzik is (661) 326-9600.
- Does John Gundzik accept Medicare?
- John Gundzik is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Gundzik's NPI active?
- Yes — John Gundzik's NPI (1659390995) is active in the NPPES registry as of the last update on 2011-08-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.