Vincent Wen Chien Kao, DO
Gastroenterology Physician · Fountain Valley, CA
Vincent Wen Chien Kao, DO is a gastroenterology physician with a practice address in Fountain Valley, California, and NPI 1649570268, issued on Oct 29, 2010. Check the license (California 20A11408, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Vincent Wen Chien Kao
- Credential
- DO
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 20A11408 CA
Self-reported in NPPES; status is on the state search - Practice location
- 18035 Brookhurst St Ste 2100, Fountain Valley, CA 92708
- Phone
- (657) 241-9090
- Enumerated
- Oct 29, 2010
- Record last updated
- May 8, 2025
- Fax
- (714) 665-4603
- Medicare enrollment
- Enrolled (PECOS I20130403000123); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 18035 Brookhurst St Ste 2100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Erick Argueta, MDGastroenterology Physician1083144638
- Sarah Bartulis, CNMAdvanced Practice Midwife1639554678
- Trisha Chaudhury, DOObstetrics & Gynecology Physician1316688815
- Nancy Han, M.D.Gastroenterology Physician1609055300
- Lizhou Huang, M.D.Gastroenterology Physician1396088977
- Lena Nguyen, DOObstetrics & Gynecology Physician1467741728
Verify Vincent Wen Chien Kao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A11408Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average gastroenterology physician in 2024
1,087 Medicare Part D claims for 494 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Sod Sulf-Potass Sulf-Mag Sulf259 claims
- Omeprazole209 claims
- Pantoprazole Sodium102 claims
- Linzess78 claims
- Famotidine46 claims
- Dicyclomine Hcl45 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Memorialcare Medical FoundationFountain Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Vincent Wen Chien Kao among 2,140 gastroenterology physician records in California
Vincent Wen Chien Kao, DO is one of 2,140 gastroenterology 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. Its NPI, issued in 2010, is newer than 72% of them.
- NPI issued2010 · 72% of these records are older, 26% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2009 · median 2002 among the 1,538 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Fountain Valley → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Jose Luis Aranez, M.D.Fountain Valley, CA 927081932466125
- Erick Argueta, MDFountain Valley, CA 927081083144638
- Fernando Austin, MDFountain Valley, CA 927081174527774
- Babak Firoozi, M.D.Fountain Valley, CA 927081891734828
- Nancy Han, M.D.Fountain Valley, CA 927081609055300
- Lizhou Huang, M.D.Fountain Valley, CA 927081396088977
- Duke Nguyen, MDFountain Valley, CA 927081679557797
- Ronald Policastro, M.D.Fountain Valley, CA 927081962671636
Common questions
What is Vincent Wen Chien Kao, DO's NPI number?
Vincent Wen Chien Kao, DO's National Provider Identifier (NPI) is 1649570268, issued on Oct 29, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Vincent Wen Chien Kao, DO located?
The NPPES record lists a practice address at 18035 Brookhurst St Ste 2100, Fountain Valley, CA, 92708. Phone: (657) 241-9090. Providers update this record themselves, so call before visiting.
How can I verify Vincent Wen Chien Kao, DO's license?
NPPES lists California license number 20A11408, 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.
How much does Vincent Wen Chien Kao, DO prescribe under Medicare Part D?
In 2024, Vincent Wen Chien Kao, DO had 1,087 Medicare Part D claims for 494 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
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.