Carlos Alberto Contreras, M.D.
Psychiatry Physician · Walnut Creek, CA
Carlos Alberto Contreras, M.D. is a psychiatry physician with a practice address in Walnut Creek, California, and NPI 1528325412, issued on Apr 16, 2012. Check the license (California A129587, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Carlos Alberto Contreras
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A129587 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3100 Oak RD Ste 270, Walnut Creek, CA 94597
- Phone
- (925) 944-9711
- Enumerated
- Apr 16, 2012
- Record last updated
- Aug 25, 2025
- Medicare enrollment
- Enrolled (PECOS I20141217001273); accepts Medicare assignment
- Medical or professional school
- Texas Tech University Health Science Center School Of Medicine, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 3100 Oak RD Ste 270
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Carlos Alberto Contreras in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A129587Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average psychiatry physician in 2024
156 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Clonazepam23 claims
- Trazodone Hcl23 claims
- Mirtazapine13 claims
- Amitriptyline Hcl12 claims
- Sertraline Hcl12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $58.88
1 payment: food and beverage; the largest payer was Delcath Systems. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Comprehensive Psychiatric Services A Medical GroupIrvine, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
67 psychiatry physician records list a practice address in Walnut Creek
They are 67 of the 6,170 NPPES records with a practice address in Walnut Creek, and 8,673 psychiatry physician records in California.
All 67 in Walnut Creek → All 8,673 in California → Every provider in Walnut Creek →
Other psychiatry physician records in California
- Nancy Aaen, MDNapa, CA1609816669
- Criselda Abad-Santos, M.D.Woodland Hills, CA1760461826
- Mekabiz Abaian, MDSan Bernardino, CA1891090163
- Brenda Abarca, MDTorrance, CA1407485527
- Pilar Abascal, M.D.Los Angeles, CA1730528191
- Michele Abbasi, M.D.Westlake Village, CA1093940330
- Zohaib AbbasiMartinez, CA1013392224
- Sandy Abdelkedous, MDFresno, CA1306093109
- Nancy Abdelmalak, M.D.Elk Grove, CA1912137498
- Ezzat Abdelmalek, M.DDana Point, CA1992828826
Common questions
What is Carlos Alberto Contreras, M.D.'s NPI number?
Carlos Alberto Contreras, M.D.'s National Provider Identifier (NPI) is 1528325412, issued on Apr 16, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Carlos Alberto Contreras, M.D. located?
The NPPES record lists a practice address at 3100 Oak RD Ste 270, Walnut Creek, CA, 94597. Phone: (925) 944-9711. Providers update this record themselves, so call before visiting.
How can I verify Carlos Alberto Contreras, M.D.'s license?
NPPES lists California license number A129587, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Carlos Alberto Contreras, M.D. prescribe under Medicare Part D?
In 2024, Carlos Alberto Contreras, M.D. had 156 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.