NPPES file of Aug 9, 2026

Gregory Todd Siebert, DC

Chiropractor · San Clemente, CA

Gregory Todd Siebert, DC is a chiropractor with a practice address in San Clemente, California, and NPI 1548366420, issued on Sep 16, 2006. Check the license (California DC23370, 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.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1548366420
Name
Gregory Todd Siebert
Credential
DC
Primary taxonomy
Chiropractor 111N00000X
License number
DC23370 CA
Self-reported in NPPES; status is on the state search
Practice location
1300 Avenida Vista Hermosa, San Clemente, CA 92673
Phone
(949) 366-0070
Enumerated
Sep 16, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(949) 492-4948
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest chiropractor records → All 11,498 in California → Look up another NPI →

Also registered at 1300 Avenida Vista Hermosa

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Paulina Avendano, MD,FAAPPediatrics Physician1982764858
  2. Christopher Carlin, M.D.Procedural Dermatology Physician1336186493
  3. Carrie Crawford, FNPFamily Nurse Practitioner1356798789
  4. Lauren Dwinell, M.D.Pediatrics Physician1679671358
  5. Sepideh Forstie, D.C.Sports Physician Chiropractor1104189570
  6. Eva Gentile, MDFamily Medicine Physician1811030117

Verify Gregory Todd Siebert in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license DC23370    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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Gregory Todd Siebert among 11,498 chiropractor records in California

Gregory Todd Siebert, DC 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 updated2007 · 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).

33 chiropractor records list a practice address in San Clemente

They are 33 of the 969 NPPES records with a practice address in San Clemente, 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 Clemente → Chiropractor nationwide →

The 8 chiropractor records with the nearest ZIP codes

  1. David Ahrens, D.C.San Clemente, CA 926731639188212
  2. Ryan Anderson, D.C.San Clemente, CA 926731295175024
  3. Erin Christiansen, D.C.San Clemente, CA 926731588968846
  4. Michael Coppola, D.C.San Clemente, CA 926731699962423
  5. Mark Metildi, D.C.San Clemente, CA 926731427200633
  6. Nancy Molina, D.C.San Clemente, CA 926731104880616
  7. Don Moore, DCSan Clemente, CA 926731417092719
  8. Bradley Shapero, DCSan Clemente, CA 926731588710263

Common questions

What is Gregory Todd Siebert, DC's NPI number?

Gregory Todd Siebert, DC's National Provider Identifier (NPI) is 1548366420, issued on Sep 16, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Gregory Todd Siebert, DC located?

The NPPES record lists a practice address at 1300 Avenida Vista Hermosa, San Clemente, CA, 92673. Phone: (949) 366-0070. Providers update this record themselves, so call before visiting.

How can I verify Gregory Todd Siebert, DC's license?

NPPES lists California license number DC23370, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.