NPPES file of Aug 9, 2026

Diana Mai Diaz, M.D.

Anesthesiology Physician · Orange, CA

Diana Mai Diaz, M.D. is an anesthesiology physician with a practice address in Orange, California, and NPI 1932424793, issued on Apr 5, 2010. Check the license (California A118500, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1932424793
Name
Diana Mai Diaz
Credential
M.D.
Primary taxonomy
Anesthesiology Physician 207L00000X
License number
A118500 CA
Self-reported in NPPES; status is on the state search
Practice location
333 City Blvd W Ste 2150, Orange, CA 92868
Phone
(949) 351-0656
Enumerated
Apr 5, 2010
Record last updated
Dec 21, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20140805002719); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 333 City Blvd W Ste 2150

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

  1. Veronika AnufreichikAnesthesiology Physician1083147953
  2. Samuel Barsh, MDAnesthesiology Physician1700415445
  3. Isabel ChangAnesthesiology Physician1821452293
  4. Jason Cosman, MDStudent in an Organized Health Care Education/Training Program1033798020
  5. Tin Dinh, MDStudent in an Organized Health Care Education/Training Program1306588306
  6. Scott Erwin, MDAnesthesiology Physician1184187247

Verify Diana Mai Diaz in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A118500    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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Bills Medicare through one group practice

  1. Southern California Permanente Medical GroupBaldwin Park, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

267 anesthesiology physician records list a practice address in Orange

They are 267 of the 13,245 NPPES records with a practice address in Orange, and 7,571 anesthesiology physician records in California.

All 267 in Orange → All 7,571 in California → Every provider in Orange →

Other anesthesiology physician records in California

  1. Alison A'Court, MDSan Diego, CA1912218199
  2. Elma Abad-Pelsang, MDDel Mar, CA1689611923
  3. Rolando Abada, M.D.San Diego, CA1952319071
  4. Maher Abadir, MDTurlock, CA1669491718
  5. Jerry Abajian, M.D.Napa, CA1851336218
  6. Carolyn AbbasiLoma Linda, CA1811287311
  7. Christine Abboud, D.O.Walnut Creek, CA1174901508
  8. Steven Abboud, MDPalo Alto, CA1619364908
  9. Therese Abboud, M.D.Coronado, CA1003112913
  10. Mohammed Abdel Rahim, M.B.CH.BNewport Beach, CA1255520854

Common questions

What is Diana Mai Diaz, M.D.'s NPI number?

Diana Mai Diaz, M.D.'s National Provider Identifier (NPI) is 1932424793, issued on Apr 5, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Diana Mai Diaz, M.D. located?

The NPPES record lists a practice address at 333 City Blvd W Ste 2150, Orange, CA, 92868. Phone: (949) 351-0656. Providers update this record themselves, so call before visiting.

How can I verify Diana Mai Diaz, M.D.'s license?

NPPES lists California license number A118500, 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. Medicare files from data.cms.gov. 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.