DR. CARLOS ALBERTO CONTRERAS M.D.
NPI 1528325412
Psychiatry & Neurology - Psychiatry in Walnut Creek, CA
About Dr. Carlos Alberto Contreras M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CARLOS ALBERTO CONTRERAS M.D. (NPI 1528325412) is an individual psychiatry provider in Walnut Creek, California, licensed in California (A129587) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS, maintains a secondary practice location in North Hills, and is a graduate of Texas Tech University Health Science Center School Of Medicine (2012).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
Accepted Insurance
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
Dr. Carlos Alberto Contreras 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
2Medicare enrollment records show Carlos Contreras reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Walnut Creek, CA 94597
- Reassigned Medicare billing, California enrollment
- 149 clinicians in this Medicare group
Lancaster, CA 93535
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: County Of Los Angeles
- 1,939 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94597 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WALNUT CREEK, CA 94597
WALNUT CREEK, CA 94597
WALNUT CREEK, CA 94597
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 Carlos Contreras's NPI number?
The NPI number for Carlos Contreras is 1528325412. It was assigned to this individual provider in the NPPES registry on April 16, 2012.
Where is Carlos Contreras located?
Carlos Contreras practices at 3100 Oak Rd Ste 270, Walnut Creek, CA 94597. The listed phone number is (925) 944-9711.
What is Carlos Contreras's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Carlos Contreras enrolled in Medicare?
Yes. Carlos Contreras 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 Carlos Contreras's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Carlos Contreras reassigns Medicare benefits to 2 organizations: Comprehensive Psychiatric Services, A Medical Group (Walnut Creek, CA) and County Of Los Angeles Auditor Controller (Lancaster, 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 Carlos Contreras's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Carlos Contreras accept?
Health plans from Blue Cross and Blue Shield of Texas list Carlos Contreras as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Carlos Contreras was last updated on August 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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.
# Dr. Carlos Alberto Contreras, M.D. · NPI 1528325412
Psychiatry physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since April 16, 2012.
## Identity
- **NPI:** 1528325412 (Entity type: Individual)
- **Enumerated:** April 16, 2012
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** A129587 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 3100 OAK RD STE 270, Walnut Creek, CA 94597-2078
- **Phone:** (925) 944-9711
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Comprehensive Psychiatric Services, A Medical Group (NPI 1184785834, Walnut Creek, CA); County Of Los Angeles Auditor Controller (NPI 1366453045, Lancaster, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Texas Tech University Health Science Center School Of Medicine, class of 2012
## Record status
- **NPPES last updated:** August 25, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1528325412) · Data from the CMS NPPES public registry.