Stephen V. Sum, D.C.
Chiropractor · Castro Valley, CA
Stephen V. Sum, D.C. is a chiropractor with a practice address in Castro Valley, California, and NPI 1912055195, issued on Jan 6, 2007. Check the license (California 18971, 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
- Stephen V. Sum
- Credential
- D.C.
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- 18971 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20406 Redwood RD, Castro Valley, CA 94546
- Phone
- (510) 538-1111
- Enumerated
- Jan 6, 2007
- Record last updated
- Oct 23, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (510) 538-1040
- Medicare enrollment
- Enrolled (PECOS I20080212000369); accepts Medicare assignment
- Medical or professional school
- Life Chiropractic College - West, 1987
- Entity
- Type 1 · individual
8 nearest chiropractor records → All 11,498 in California → Look up another NPI →
Also registered at 20406 Redwood RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Stephen La Due, DDSDentist1396879565
- Cassie Stansberry, D.C.Chiropractor1659119956
Verify Stephen V. Sum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 18971Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Stephen V. Sum among 11,498 chiropractor records in California
Stephen V. Sum, 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 2007, is newer than 35% of them.
- NPI issued2007 · 35% of these records are older, 45% newer
- In a Medicare fileNo · 7% of these records are
- In the CMS Doctors and Clinicians fileYes · 25% of these records are
- Graduated1987 · median 1999 among the 2,907 with a school on file
- Record last updated2015 · 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).
35 chiropractor records list a practice address in Castro Valley
They are 35 of the 999 NPPES records with a practice address in Castro Valley, 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 Castro Valley → Chiropractor nationwide →
The 8 chiropractor records with the nearest ZIP codes
- Jeffrey Canada, D.C.Castro Valley, CA 945461417999525
- Laurie Gossett, DCCastro Valley, CA 945461215055066
- John Guilford, D.C.Castro Valley, CA 945461851302509
- Timothy Jameson, D.C.Castro Valley, CA 945461326178542
- Brian Kalsbeek, D.C.Castro Valley, CA 945461053404095
- Robert Katona, DCCastro Valley, CA 945461952451387
- Darrell Lavin, D.C.Castro Valley, CA 945461881766897
- Chris Murray, D.C.Castro Valley, CA 945461659374726
Common questions
What is Stephen V. Sum, D.C.'s NPI number?
Stephen V. Sum, D.C.'s National Provider Identifier (NPI) is 1912055195, issued on Jan 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Stephen V. Sum, D.C. located?
The NPPES record lists a practice address at 20406 Redwood RD, Castro Valley, CA, 94546. Phone: (510) 538-1111. Providers update this record themselves, so call before visiting.
How can I verify Stephen V. Sum, D.C.'s license?
NPPES lists California license number 18971, 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.