Gary Loos, D.C.
Chiropractor · San Marcos, CA
Gary Loos, D.C. is a chiropractor with a practice address in San Marcos, California, and NPI 1659441053, issued on Nov 9, 2006. Check the license (California DC19521, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gary Loos
- Credential
- D.C.
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- DC19521 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1645 S Rancho Santa FE RD, San Marcos, CA 92078
- Phone
- (760) 290-3611
- Enumerated
- Nov 9, 2006
- Record last updated
- Sep 24, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (760) 290-3719
- Entity
- Type 1 · individual
8 nearest chiropractor records → All 11,498 in California → Look up another NPI →
Verify Gary Loos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license DC19521Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gary Loos among 11,498 chiropractor records in California
Gary Loos, D.C. is one of 11,498 chiropractor records with a practice address in California. 7% 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 3% of them.
- NPI issued2006 · 3% of these records are older, 65% newer
- In a Medicare fileNo · 7% of these records are
- In the CMS Doctors and Clinicians fileNo · 25% of these records are
- Record last updated2019 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 111N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
38 chiropractor records list a practice address in San Marcos
They are 38 of the 1,985 NPPES records with a practice address in San Marcos, and 11,498 chiropractor records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 11,498 in California → Every provider in San Marcos → Chiropractor nationwide →
The 8 chiropractor records with the nearest ZIP codes
- Regina BrownSan Marcos, CA 920781093748980
- Jason Edwards, DCSan Marcos, CA 920781114022696
- Jose Hernandez, D.C.San Marcos, CA 920781720158140
- Gary Lewkovich, DCSan Marcos, CA 920781851497598
- Tracy Magie, D.C.San Marcos, CA 920781558433714
- Dale Mauser, DCSan Marcos, CA 920781366505497
- Jill Ellen Mauser, DCSan Marcos, CA 920781033274311
- Finbarr Mulvey, D.C.San Marcos, CA 920781720150022
Common questions
What is Gary Loos, D.C.'s NPI number?
Gary Loos, D.C.'s National Provider Identifier (NPI) is 1659441053, issued on Nov 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary Loos, D.C. located?
The NPPES record lists a practice address at 1645 S Rancho Santa FE RD, San Marcos, CA, 92078. Phone: (760) 290-3611. Providers update this record themselves, so call before visiting.
How can I verify Gary Loos, D.C.'s license?
NPPES lists California license number DC19521, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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. 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.