NPPES file of Aug 9, 2026

David B. Okun, M.D.

Hematology & Oncology Physician · Laguna Hills, CA

David B. Okun, M.D. is a hematology & oncology physician with a practice address in Laguna Hills, California, and NPI 1306839287, issued on Aug 26, 2005. Check the license (California G29859, 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
1306839287
Name
David B. Okun
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License number
G29859 CA
Self-reported in NPPES; status is on the state search
Practice location
24953 Paseo DE Valencia, Laguna Hills, CA 92653
Phone
(949) 770-8168
Enumerated
Aug 26, 2005
Record last updated
Jul 13, 2026
Fax
(949) 770-2991
Medicaid ID
00G298590 CA
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 hematology & oncology physician records → All 1,583 in California → Look up another NPI →

Also registered at 24953 Paseo DE Valencia

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

  1. Lorelei Achor, DPMFoot & Ankle Surgery Podiatrist1417999244
  2. Michelle AmberAddiction (Substance Use Disorder) Counselor1093200578
  3. Zachary AnastClinical Social Worker1942070362
  4. Pedram Ansari Pirsaraei, M.D.Internal Medicine Physician1871853614
  5. Lori Ash, LCSWMental Health Counselor1811076862
  6. Neelam AzizAddiction (Substance Use Disorder) Counselor1952112534

Verify David B. Okun in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G29859    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 B. Okun among 1,583 hematology & oncology physician records in California

David B. Okun, M.D. is one of 1,583 hematology & oncology physician records with a practice address in California. 83% 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 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 92% newer
  • In a Medicare fileNo · 83% of these records are
  • In the CMS Doctors and Clinicians fileNo · 71% of these records are
  • Record last updated2026 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in California

There are 1,583 hematology & oncology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,583 in California → Every provider in Laguna Hills → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. Howard Cheng, M.D.Laguna Hills, CA 926531366435299
  2. Gol Golshani, M.DLaguna Hills, CA 926531629497797
  3. Yulian Khagi, M.D.Laguna Hills, CA 926531710253638
  4. Jacqueline Malekirad, M.D.Laguna Hills, CA 926531972892750
  5. Merry Tetef, M.D.Laguna Hills, CA 926531194784785
  6. Edward Wagner, M.D.Laguna Hills, CA 926531487799474
  7. Shi Yu, M.D.Laguna Hills, CA 926531750744967
  8. Gabor Kovacs, M.D.Laguna Beach, CA 926511215081575

Common questions

What is David B. Okun, M.D.'s NPI number?

David B. Okun, M.D.'s National Provider Identifier (NPI) is 1306839287, issued on Aug 26, 2005. An NPI identifies a provider in billing; it is not a license.

Where is David B. Okun, M.D. located?

The NPPES record lists a practice address at 24953 Paseo DE Valencia, Laguna Hills, CA, 92653. Phone: (949) 770-8168. Providers update this record themselves, so call before visiting.

How can I verify David B. Okun, M.D.'s license?

NPPES lists California license number G29859, 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.