Catherine Y. Han, MD
Obstetrics & Gynecology Physician · Irvine, CA
Catherine Y. Han, MD is an obstetrics & gynecology physician with a practice address in Irvine, California, and NPI 1023076221, issued on May 4, 2006. Check the license (California A64536, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Catherine Y. Han
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A64536 CA
Self-reported in NPPES; status is on the state search - Practice location
- 16305 Sand Canyon Ave Ste 275, Irvine, CA 92618
- Phone
- (949) 829-5533
- Enumerated
- May 4, 2006
- Record last updated
- Feb 2, 2026
- Medicare enrollment
- Enrolled (PECOS I20110104000163); accepts Medicare assignment
- Medical or professional school
- Js Weill Medical College, Cornell University, 1996
- Entity
- Type 1 · individual
Also registered at 16305 Sand Canyon Ave Ste 275
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Janice Enriquez, CNM, WHNPAdvanced Practice Midwife1437522828
Verify Catherine Y. Han in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A64536Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Hoag ClinicIrvine, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
Other obstetrics & gynecology physician records in California
- Ingrid Aalami, MDSan Jose, CA1952376550
- Avisa Abaian- Eagar, M.D.Orange, CA1316057755
- Derek Abbassi, MDWalnut Creek, CA1841364155
- Ahmed Abdelaziz, MDSanta Maria, CA1790039733
- Alireza Abdollah Shamshirsaz, M.D.Palo Alto, CA1881804235
- Nicole Abell, DOVentura, CA1811243603
- Zachary AbelsonLos Angeles, CA1689237414
- Ray Abinader, M.D.Loma Linda, CA1770901548
- Tarek Abou El Kheir, M.D.San Bernardino, CA1477521789
- Nada Abou-HaibaLos Angeles, CA1134067549
Common questions
What is Catherine Y. Han, MD's NPI number?
Catherine Y. Han, MD's National Provider Identifier (NPI) is 1023076221, issued on May 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Y. Han, MD located?
The NPPES record lists a practice address at 16305 Sand Canyon Ave Ste 275, Irvine, CA, 92618. Phone: (949) 829-5533. Providers update this record themselves, so call before visiting.
How can I verify Catherine Y. Han, MD's license?
NPPES lists California license number A64536, 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.
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.