Harold Susumu Masuda, O.D.
Optometrist · Montebello, CA
Harold Susumu Masuda, O.D. is an optometrist with a practice address in Montebello, California, and NPI 1780614545, issued on Jul 4, 2006. Check the license (California 8538T, 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 Susumu Masuda
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 8538T CA
Self-reported in NPPES; status is on the state search - Practice location
- 1449 W Beverly Blvd, Montebello, CA 90640
- Phone
- (323) 723-3937
- Enumerated
- Jul 4, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Verify Harold Susumu Masuda in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 8538TCheck 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 Susumu Masuda among 8,308 optometrist records in California
Harold Susumu Masuda, O.D. is one of 8,308 optometrist records with a practice address in California. 67% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 66% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2007 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 optometrist records list a practice address in Montebello
They are 27 of the 728 NPPES records with a practice address in Montebello, and 8,308 optometrist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 8,308 in California → Every provider in Montebello → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- David Duenas, O.D.Montebello, CA 906401750451985
- Makkasen Em, ODMontebello, CA 906401205988656
- Catherine Huang, O.D.Montebello, CA 906401518976448
- Todd Mishima, ODMontebello, CA 906401841215365
- Thien Nguyen, O.D.Montebello, CA 906401568471373
- Evelyn Perez, ODMontebello, CA 906401124101084
- David Reynolds, O.D.Montebello, CA 906401255493946
- Martha Sanchez, O.D.Montebello, CA 906401336282318
Common questions
What is Harold Susumu Masuda, O.D.'s NPI number?
Harold Susumu Masuda, O.D.'s National Provider Identifier (NPI) is 1780614545, issued on Jul 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harold Susumu Masuda, O.D. located?
The NPPES record lists a practice address at 1449 W Beverly Blvd, Montebello, CA, 90640. Phone: (323) 723-3937. Providers update this record themselves, so call before visiting.
How can I verify Harold Susumu Masuda, O.D.'s license?
NPPES lists California license number 8538T, 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.