NPPES file of Aug 9, 2026

David Masao Hirota, M.D.

Internal Medicine Physician · Ontario, CA

David Masao Hirota, M.D. is an internal medicine physician with a practice address in Ontario, California, and NPI 1699735191, issued on Mar 27, 2006. Check the license (California A065105, as entered in NPPES) on the Medical Board of California; 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
1699735191
Name
David Masao Hirota
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
A065105 CA
Self-reported in NPPES; status is on the state search
Practice location
3401 Centre Lake Dr Ste 512, Ontario, CA 91761
Phone
(909) 566-0445
Enumerated
Mar 27, 2006
Record last updated
Oct 24, 2019 (not updated in 7 years: call before relying on the address or phone)
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 internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 3401 Centre Lake Dr Ste 512

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

  1. Kevin BellPhysician Assistant1497159818
  2. Judith Cabrera, MDFamily Medicine Physician1710202734
  3. Aurora De Los Santos, NP-CPrimary Care Nurse Practitioner1891116398
  4. Ana Lemus, FNPNurse Practitioner1932614203
  5. Ashley McCabe, NPPrimary Care Nurse Practitioner1396146882
  6. Spencer Nguyen, FNPFamily Nurse Practitioner1760808125

Verify David Masao Hirota in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A065105    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
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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David Masao Hirota among 17,696 internal medicine physician records in California

David Masao Hirota, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.

  • NPI issued2006 · 5% of these records are older, 56% newer
  • In a Medicare fileNo · 79% of these records are
  • In the CMS Doctors and Clinicians fileNo · 63% of these records are
  • Record last updated2019 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Internal Medicine Physician providers in California

There are 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 17,696 in California → Every provider in Ontario → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Liwanag Asuncion, M.D.Ontario, CA 917611437122082
  2. Dianne Quintana, M.D.Ontario, CA 917611386083780
  3. Rodman St. Clair, M.D.Ontario, CA 917611275788630
  4. Sujay DayalOntario, CA 917621740920966
  5. Mohammed Al-Khayyat, M.D.Montclair, CA 917631588195424
  6. Sadia Khan, MDMontclair, CA 917631225271125
  7. George Moran, MDMontclair, CA 917631639673635
  8. Kiandokht Partovi, M.D.Montclair, CA 917631689763427

Common questions

What is David Masao Hirota, M.D.'s NPI number?

David Masao Hirota, M.D.'s National Provider Identifier (NPI) is 1699735191, issued on Mar 27, 2006. An NPI identifies a provider in billing; it is not a license.

Where is David Masao Hirota, M.D. located?

The NPPES record lists a practice address at 3401 Centre Lake Dr Ste 512, Ontario, CA, 91761. Phone: (909) 566-0445. Providers update this record themselves, so call before visiting.

How can I verify David Masao Hirota, M.D.'s license?

NPPES lists California license number A065105, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

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.