1. Home
  2. Directory
  3. California
  4. Laguna Hills
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DAVID B OKUN M.D.
NPI 1306839287
Internal Medicine - Hematology & Oncology in Laguna Hills, CA

Active since August 26, 2005
24953 PASEO DE VALENCIA, #25B, LAGUNA HILLS, CA 92653(949) 770-8168(949) 770-2991 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About David B Okun M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DAVID B OKUN M.D. (NPI 1306839287) is an individual hematology & oncology provider in Laguna Hills, California, licensed in California (G29859) and active in the NPI registry since August 2005.

NPPES Registry Identity

NPI1306839287
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDAVID B OKUNCredential: M.D.
Location Address24953 PASEO DE VALENCIA, #25BLaguna Hills, CA 92653-4342
Mailing Address24953 Paseo De Valencia, #25bLaguna Hills, CA 92653-4342 · (949) 770-8168 · Fax (949) 770-2991
Phone(949) 770-8168
Fax(949) 770-2991
Sole ProprietorNo
Enumeration DateAugust 26, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1306839287 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in CA · G29859
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
24953 PASEO DE VALENCIA, Laguna Hills, CA 92653
Open in Google Maps ↗

Other Identifiers 1

Medicaid00G298590CA

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. THOMAS OWEN SMITH D.D.S.
Dentist (General Practice)
24953 PASEO DE VALENCIA, SUITE 20A
LAGUNA HILLS, CA 92653
Orange County (949) 855-1164
DR. ALI MESCHI PHD
Nutritionist (Nutrition, Education)
24953 PASEO DE VALENCIA, SUITE 27A
LAGUNA HILLS, CA 92653
Orange County (949) 206-9061
DR. DENNIS S PHILLIPS MD
Pediatrics
24953 PASEO DE VALENCIA, #5A
LAGUNA HILLS, CA 92653
Orange County (949) 951-1376
SHAHRYAR MOUSAVI MD
Pain Medicine (Interventional Pain Medicine)
24953 PASEO DE VALENCIA, #3A
LAGUNA HILLS, CA 92653
Orange County (949) 297-3838
ALISO HILLS DENTAL ASSOCIATES
Dentist (General Practice)
24953 PASEO DE VALENCIA, SUITE 22B
LAGUNA HILLS, CA 92653
Orange County (949) 951-1066
INDERPAL SINGH GUJRAL MD
Internal Medicine (Cardiovascular Disease)
24953 PASEO DE VALENCIA, 30 A
LAGUNA HILLS, CA 92653
Orange County (949) 716-7981
YANBING ZENG MD INC
Family Medicine
24953 PASEO DE VALENCIA, 29A
LAGUNA HILLS, CA 92653
Orange County (949) 951-4953
SAMANTHA JOYCE BERGLUND
Counselor (Addiction (Substance Use Disorder))
24953 PASEO DE VALENCIA, BLDG B, STE. 1B
LAGUNA HILLS, CA 92653
Orange County (949) 540-0170

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is David Okun's NPI number?

The NPI number for David Okun is 1306839287. It was assigned to this individual provider in the NPPES registry on August 26, 2005.

Where is David Okun located?

David Okun practices at 24953 Paseo De Valencia #25b, Laguna Hills, CA 92653. The listed phone number is (949) 770-8168.

What is David Okun's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

When was this NPI record last updated?

The NPPES record for David Okun was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.