JOHN GEORGE MARDIAT M.D.
NPI 1801896675
Radiology - Diagnostic Radiology in Santa Barbara, CA
About John George Mardiat M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN GEORGE MARDIAT M.D. (NPI 1801896675) is an individual diagnostic radiology provider in Santa Barbara, California, licensed in California (G44393) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Missouri, Kansas City, School Of Medicine (1979).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 6
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John George Mardiat M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show John Mardiat reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Northridge, CA 91325
- Reassigned Medicare billing, California enrollment
- 224 clinicians in this Medicare group
Bakersfield, CA 93311
- Reassigned Medicare billing, California enrollment
- 252 clinicians in this Medicare group
Bakersfield, CA 93309
- Reassigned Medicare billing, California enrollment
- 11 clinicians in this Medicare group
Los Angeles, CA 90036
- Reassigned Medicare billing, California enrollment
- 57 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 93105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SANTA BARBARA, CA 93105
SANTA BARBARA, CA 93105
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Mardiat's NPI number?
The NPI number for John Mardiat is 1801896675. It was assigned to this individual provider in the NPPES registry on July 22, 2005.
Where is John Mardiat located?
John Mardiat practices at 316 W Junipero St, Santa Barbara, CA 93105. The listed phone number is (805) 448-5825.
What is John Mardiat's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is John Mardiat enrolled in Medicare?
Yes. John Mardiat is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Mardiat's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Mardiat reassigns Medicare benefits to 4 organizations: Renaissance Imaging Medical Associates, Inc. (Northridge, CA), Kern Radiology Medical Group, Inc (Bakersfield, CA), Riverwalk Medical Corporation (Bakersfield, CA) and Tower Imaging Medical Associates, Inc. (Los Angeles, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Mardiat's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Mardiat was last updated on January 25, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John George Mardiat, M.D. · NPI 1801896675
Diagnostic Radiology physician in Santa Barbara, California. Individual provider, active in the CMS NPPES registry since July 22, 2005.
## Identity
- **NPI:** 1801896675 (Entity type: Individual)
- **Enumerated:** July 22, 2005
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** G44393 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 316 W JUNIPERO ST, Santa Barbara, CA 93105-4305
- **Phone:** (805) 448-5825 · **Fax:** (805) 569-0079
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Renaissance Imaging Medical Associates, Inc. (NPI 1487608931, Northridge, CA); Kern Radiology Medical Group, Inc (NPI 1336485218, Bakersfield, CA); Riverwalk Medical Corporation (NPI 1477803609, Bakersfield, CA); Tower Imaging Medical Associates, Inc. (NPI 1023315074, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Missouri, Kansas City, School Of Medicine, class of 1979
## Record status
- **NPPES last updated:** January 25, 2012
- **Other identifiers:** Medicaid 00G443930 (CA); Medicare ID-Type Unspecified WG44393C; Medicare PIN DP019X (CA); and 3 more
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Source: [NPI Profile](https://npiprofile.com/npi/1801896675) · Data from the CMS NPPES public registry.