Thomas Welles Backus, M.D.
Psychiatry Physician · Laguna Hills, CA
Thomas Welles Backus, M.D. is a psychiatry physician with a practice address in Laguna Hills, California, and NPI 1831288828, issued on Oct 11, 2006. Check the license (California G40049, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Thomas Welles Backus
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G40049 CA
Self-reported in NPPES; status is on the state search - Practice location
- 23461 South Pointe Dr. Suite 220, Laguna Hills, CA 92653
- Phone
- (949) 547-3866
- Enumerated
- Oct 11, 2006
- Record last updated
- Nov 15, 2010 (not updated in 16 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Verify Thomas Welles Backus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G40049Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Thomas Welles Backus among 8,673 psychiatry physician records in California
Thomas Welles Backus, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 67% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2010 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 8,673 in California → Every provider in Laguna Hills → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Phillip Cohen, M.D.Laguna Hills, CA 926531144231986
- Dennis De Pry, D.O.Laguna Hills, CA 926531386731909
- Tatyana Ellison, M.D.Laguna Hills, CA 926531477868578
- Chona Green, MDLaguna Hills, CA 926531437219441
- Jason Guthridge, BCABALaguna Hills, CA 926531679868194
- Debra Hill, M.D.Laguna Hills, CA 926531376825638
- Steven Keys, M.D.Laguna Hills, CA 926531962575332
- Robert Lee, DOLaguna Hills, CA 926531679839385
Common questions
What is Thomas Welles Backus, M.D.'s NPI number?
Thomas Welles Backus, M.D.'s National Provider Identifier (NPI) is 1831288828, issued on Oct 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Welles Backus, M.D. located?
The NPPES record lists a practice address at 23461 South Pointe Dr. Suite 220, Laguna Hills, CA, 92653. Phone: (949) 547-3866. Providers update this record themselves, so call before visiting.
How can I verify Thomas Welles Backus, M.D.'s license?
NPPES lists California license number G40049, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.