Harold Block, D.D.S.
Dentist · San Diego, CA
Harold Block, D.D.S. is a dentist with a practice address in San Diego, California, and NPI 1003907940, issued on Sep 27, 2006. Check the license (California 21093, 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
- Harold Block
- Credential
- D.D.S.
- Primary taxonomy
- Dentist 122300000X
- License number
- 21093 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5189 Clairemont Mesa Blvd, San Diego, CA 92117
- Phone
- (858) 277-4764
- Enumerated
- Sep 27, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (858) 505-0647
- Entity
- Type 1 · individual
8 nearest dentist records → All 14,729 in California → Look up another NPI →
Also registered at 5189 Clairemont Mesa Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Stephen Baral, D.M.D.General Practice Dentistry1720258460
Verify Harold Block in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 21093Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Harold Block among 14,729 dentist records in California
Harold Block, D.D.S. is one of 14,729 dentist records with a practice address in California. 56% 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, 82% newer
- In a Medicare fileNo · 56% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dentist providers in California
There are 14,729 dentist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 14,729 in California → Every provider in San Diego → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Mike AdamsSan Diego, CA 921171538384573
- Wesam Altamimi, DDSSan Diego, CA 921171649496290
- Hussein Dhayni, DDSSan Diego, CA 921171083821797
- Michelle Espinoza, DDSSan Diego, CA 921171265557037
- William Halligan, DDSSan Diego, CA 921171326169954
- Kevin Kenny, DDSSan Diego, CA 921171457477705
- Min Lee, DDSSan Diego, CA 921171609980663
- Robert Levine, DMDSan Diego, CA 921171609060672
Common questions
What is Harold Block, D.D.S.'s NPI number?
Harold Block, D.D.S.'s National Provider Identifier (NPI) is 1003907940, issued on Sep 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harold Block, D.D.S. located?
The NPPES record lists a practice address at 5189 Clairemont Mesa Blvd, San Diego, CA, 92117. Phone: (858) 277-4764. Providers update this record themselves, so call before visiting.
How can I verify Harold Block, D.D.S.'s license?
NPPES lists California license number 21093, 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.