Andrew C. Ko, M.D.
Gastroenterology Physician · Yorba Linda, CA
Andrew C. Ko, M.D. is a gastroenterology physician with a practice address in Yorba Linda, California, and NPI 1437170990, issued on Jul 21, 2006. Check the license (California G61260, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Andrew C. Ko
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G61260 CA
Self-reported in NPPES; status is on the state search - Practice location
- 16671 East Yorba Linda Blvd Ste 210, Yorba Linda, CA 92886
- Phone
- (714) 996-3700
- Enumerated
- Jul 21, 2006
- Record last updated
- Jun 2, 2026
- Fax
- (714) 985-6480
- Medicaid ID
- 00G612601 CA
- Medicare enrollment
- Enrolled (PECOS I20041005001263); accepts Medicare assignment
- Medical or professional school
- R Franklin University Of Med & Sci/Chicago Medical School, 1986
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Verify Andrew C. Ko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G61260Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average gastroenterology physician in 2024
134 Medicare Part D claims for 60 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Famotidine45 claims
- Pantoprazole Sodium33 claims
- Sod Sulf-Potass Sulf-Mag Sulf25 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.
Industry payments in 2024: $118.88
1 payment: food and beverage; the largest payer was Intercept Pharmaceuticals, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- UC RegentsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew C. Ko among 2,140 gastroenterology physician records in California
Andrew C. Ko, M.D. 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1986 · median 2002 among the 1,538 with a school on file
- Record last updated2026 · 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 Yorba Linda → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- David Chapman, M.D.Yorba Linda, CA 928861053321943
- Tahmina Haq, M.D.Yorba Linda, CA 928861538332853
- Hyder Jamal, MDYorba Linda, CA 928861740280932
- Keith Martin, M.D.Yorba Linda, CA 928861649280546
- Paurush Shah, MDYorba Linda, CA 928861699090274
- Marco Paez, M.D.Corona, CA 928821902167695
- Omar Shahbaz, M.D., M.S.Corona, CA 928821417226366
- M. Mazen Jamal, M.D., M.P.H.Corona, CA 928811003916727
Common questions
What is Andrew C. Ko, M.D.'s NPI number?
Andrew C. Ko, M.D.'s National Provider Identifier (NPI) is 1437170990, issued on Jul 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Andrew C. Ko, M.D. located?
The NPPES record lists a practice address at 16671 East Yorba Linda Blvd Ste 210, Yorba Linda, CA, 92886. Phone: (714) 996-3700. Providers update this record themselves, so call before visiting.
How can I verify Andrew C. Ko, M.D.'s license?
NPPES lists California license number G61260, 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 Andrew C. Ko, M.D. prescribe under Medicare Part D?
In 2024, Andrew C. Ko, M.D. had 134 Medicare Part D claims for 60 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.