Henry Koji Niho, M.D.
Gastroenterology Physician · Irvine, CA
Henry Koji Niho, M.D. is a gastroenterology physician with a practice address in Irvine, California, and NPI 1609040450, issued on Apr 14, 2008. Check the license (California A78576, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Henry Koji Niho
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A78576 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6650 Alton Pkwy, Irvine, CA 92618
- Phone
- (949) 932-2604
- Enumerated
- Apr 14, 2008
- Record last updated
- Dec 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090407000345); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 6650 Alton Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dayle Aldridge, RN, CDE, MPHDiabetes Educator Registered Nurse1619400223
- Tiffany ChavesRegistered Dietitian1194169177
- William Chen, M.D.Internal Medicine Physician1881659142
- Raymond Cho, PHARMDPharmacist1992272306
- Travis Cohoon, MDCardiovascular Disease Physician1205363264
- Jasmine CrouzetPharmacist1770122665
Verify Henry Koji Niho in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A78576Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% more Medicare Part D claims than the average gastroenterology physician in 2024
1,031 Medicare Part D claims for 448 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 22 claims were for opioids.
Most prescribed
- Gavilyte-C227 claims
- Omeprazole147 claims
- Entecavir118 claims
- Zenpep49 claims
- Mesalamine47 claims
- Pantoprazole Sodium47 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: $17.99
1 payment: food and beverage; the largest payer was Boston Scientific Corporation. 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
- Southern California Permanente Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Henry Koji Niho among 2,140 gastroenterology physician records in California
Henry Koji Niho, 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 2008, is newer than 63% of them.
- NPI issued2008 · 63% of these records are older, 31% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2000 · median 2002 among the 1,538 with a school on file
- Record last updated2021 · 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 Irvine → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Ardalan Babaknia, MDIrvine, CA 926181366527491
- Shahrooz BemanianIrvine, CA 926181629123070
- You-Jen Chou, MDIrvine, CA 926181104070887
- Lino Deguzman, M.D.Irvine, CA 926181346324720
- John Hoefs, MDIrvine, CA 926181154425742
- David Kaufman, D.O.Irvine, CA 926181508893363
- Herbert Lee, MDIrvine, CA 926181740206689
- Paul Lee, MDIrvine, CA 926181760531693
Common questions
What is Henry Koji Niho, M.D.'s NPI number?
Henry Koji Niho, M.D.'s National Provider Identifier (NPI) is 1609040450, issued on Apr 14, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Henry Koji Niho, M.D. located?
The NPPES record lists a practice address at 6650 Alton Pkwy, Irvine, CA, 92618. Phone: (949) 932-2604. Providers update this record themselves, so call before visiting.
How can I verify Henry Koji Niho, M.D.'s license?
NPPES lists California license number A78576, 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 Henry Koji Niho, M.D. prescribe under Medicare Part D?
In 2024, Henry Koji Niho, M.D. had 1,031 Medicare Part D claims for 448 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.