Gregory S. Siegel, DC
Chiropractor · Whittier, CA
Gregory S. Siegel, DC is a chiropractor with a practice address in Whittier, California, and NPI 1801800297, issued on Jul 28, 2006. Check the license (California 15681, 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
- Gregory S. Siegel
- Credential
- DC
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- 15681 CA
Self-reported in NPPES; status is on the state search - Practice location
- 12640 E Whittier Blvd, Whittier, CA 90602
- Phone
- (562) 945-2305
- Enumerated
- Jul 28, 2006
- Record last updated
- Jun 18, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (562) 698-1057
- Medicare enrollment
- Enrolled (PECOS I20090116000516); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 12640 E Whittier Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Hemauer, DCChiropractor1043327422
Verify Gregory S. Siegel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 15681Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94 chiropractor records list a practice address in Whittier
They are 94 of the 2,836 NPPES records with a practice address in Whittier, and 11,498 chiropractor records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 94 in Whittier → All 11,498 in California → Every provider in Whittier →
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- Bridget Abbott, DCDanville, CA1790508547
- Nicholas Abboud, DCMoreno Valley, CA1851134365
Common questions
What is Gregory S. Siegel, DC's NPI number?
Gregory S. Siegel, DC's National Provider Identifier (NPI) is 1801800297, issued on Jul 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory S. Siegel, DC located?
The NPPES record lists a practice address at 12640 E Whittier Blvd, Whittier, CA, 90602. Phone: (562) 945-2305. Providers update this record themselves, so call before visiting.
How can I verify Gregory S. Siegel, DC's license?
NPPES lists California license number 15681, 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.