Choon Won Koo, MD
Obstetrics & Gynecology Physician · Corena, CA
Choon Won Koo, MD is an obstetrics & gynecology physician with a practice address in Corena, California, and NPI 1457345894, issued on Aug 31, 2005. Check the license (California A32373, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Choon Won Koo
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A32373 CA
Self-reported in NPPES; status is on the state search - Practice location
- 760 S Washburn Ave, Corena, CA 92882
- Phone
- (951) 734-7200
- Enumerated
- Aug 31, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (951) 734-5057
- Medicaid ID
- 00A323730 CA
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Verify Choon Won Koo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A32373Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Choon Won Koo among 5,088 obstetrics & gynecology physician records in California
Choon Won Koo, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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, 95% newer
- In a Medicare fileNo · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2007 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,088 in California → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Thomas Cachur, D.O.Corona, CA 928821225037047
- Gamage Nanayakkara, MDCorona, CA 928831497836464
- Katrina Stinson, M.D.Temescal Valley, CA 928831881957686
- Kimberly Tustison, MDCorona, CA 928831063731297
- Jennifer Vong, DOCorona, CA 928831952669715
- Mohamedali Ismailjee, M.D.Eastvale, CA 928801952594715
- Jacqueline Long, MDCorona, CA 928801568662518
- Rajeev Gala, M.D.Corona, CA 928791205882511
Common questions
What is Choon Won Koo, MD's NPI number?
Choon Won Koo, MD's National Provider Identifier (NPI) is 1457345894, issued on Aug 31, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Choon Won Koo, MD located?
The NPPES record lists a practice address at 760 S Washburn Ave, Corena, CA, 92882. Phone: (951) 734-7200. Providers update this record themselves, so call before visiting.
How can I verify Choon Won Koo, MD's license?
NPPES lists California license number A32373, 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.
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.