Jun-Ichi Ohara, M.D., PH.D.
Gastroenterology Physician · Irvine, CA
Jun-Ichi Ohara, M.D., PH.D. is a gastroenterology physician with a practice address in Irvine, California, and NPI 1578665667, issued on Sep 1, 2006. Check the license (California AO53621A, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jun-Ichi Ohara
- Credential
- M.D., PH.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- AO53621A CA
Self-reported in NPPES; status is on the state search - Practice location
- 22 Odyssey, Irvine, CA 92618
- Phone
- (949) 654-8963
- Enumerated
- Sep 1, 2006
- Record last updated
- Feb 18, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050620000062); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 22 Odyssey
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sara Amirmehrabi, N.D.Naturopath1841645645
- Happy Baumann, FNP-CFamily Nurse Practitioner1316212368
- Mary Grayle Camacho, PTPhysical Therapist1952555823
- Kyu Sung Hwang, D.C.Chiropractor1679850143
- Swati Kenia, PTPhysical Therapist1073753844
- Mae Kinaly, M.D.Internal Medicine Physician1275566085
Verify Jun-Ichi Ohara in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license AO53621ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% more Medicare Part D claims than the average gastroenterology physician in 2024
1,225 Medicare Part D claims for 136 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Atorvastatin Calcium178 claims
- Amlodipine Besylate121 claims
- Pantoprazole Sodium77 claims
- Losartan Potassium67 claims
- Levothyroxine Sodium51 claims
- Fenofibrate42 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: $17.84
1 payment: food and beverage; the largest payer was Phathom 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
- Ohara And Associates A Professional Medical CorporationIrvine, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jun-Ichi Ohara among 2,140 gastroenterology physician records in California
Jun-Ichi Ohara, M.D., PH.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
- Graduated1975 · median 2002 among the 1,538 with a school on file
- Record last updated2020 · 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 Jun-Ichi Ohara, M.D., PH.D.'s NPI number?
Jun-Ichi Ohara, M.D., PH.D.'s National Provider Identifier (NPI) is 1578665667, issued on Sep 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jun-Ichi Ohara, M.D., PH.D. located?
The NPPES record lists a practice address at 22 Odyssey, Irvine, CA, 92618. Phone: (949) 654-8963. Providers update this record themselves, so call before visiting.
How can I verify Jun-Ichi Ohara, M.D., PH.D.'s license?
NPPES lists California license number AO53621A, 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 Jun-Ichi Ohara, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Jun-Ichi Ohara, M.D., PH.D. had 1,225 Medicare Part D claims for 136 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.