Ronald Ortizo
Gastroenterology Physician · Riverside, CA
Ronald Ortizo is a gastroenterology physician with a practice address in Riverside, California, and NPI 1124405956, issued on Apr 30, 2015. Check the license (California A147111, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald Ortizo
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A147111 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6405 Day St, Riverside, CA 92507
- Phone
- (951) 697-5464
- Enumerated
- Apr 30, 2015
- Record last updated
- Apr 15, 2025
- Fax
- (951) 697-5445
- Medicare enrollment
- Enrolled (PECOS I20210812000915); accepts Medicare assignment
- Medical or professional school
- George Washington University School Of Medicine, 2015
- 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 6405 Day St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bradley Andersen, M.D.Rheumatology Physician1528018470
- David Berke, D.O.Obstetrics & Gynecology Physician1235372335
- Archana Bhanu, MDFamily Medicine Physician1598748402
- Lee Blanton, MDOrthopaedic Surgery Physician1417262957
- Samuel Catalon, MDPediatrics Physician1568449072
- Keolanui Chun, MDOrthopaedic Surgery Physician1578507463
Verify Ronald Ortizo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A147111Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% more Medicare Part D claims than the average gastroenterology physician in 2024
1,554 Medicare Part D claims for 590 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Omeprazole407 claims
- Famotidine184 claims
- Gavilyte-C128 claims
- Gavilyte-G114 claims
- Pantoprazole Sodium77 claims
- Loperamide56 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
- Riverside Medical Clinic IncRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald Ortizo among 2,140 gastroenterology physician records in California
Ronald Ortizo 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 2015, is newer than 85% of them.
- NPI issued2015 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2015 · 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 Riverside → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Anil Garde, MDRiverside, CA 925071205817681
- Michael Baek, D.O.Riverside, CA 925061932476975
- Philip Chen, MDRiverside, CA 925061073796728
- Eric Choi, M.D.Riverside, CA 925061841406568
- Galen Huang, MDRiverside, CA 925061316971765
- Vinod Mishra, MDRiverside, CA 925061265580724
- Sharmila Patel, MDRiverside, CA 925061760467864
- Thu Pham, M.D.Riverside, CA 925061780942037
Common questions
What is Ronald Ortizo's NPI number?
Ronald Ortizo's National Provider Identifier (NPI) is 1124405956, issued on Apr 30, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Ortizo located?
The NPPES record lists a practice address at 6405 Day St, Riverside, CA, 92507. Phone: (951) 697-5464. Providers update this record themselves, so call before visiting.
How can I verify Ronald Ortizo's license?
NPPES lists California license number A147111, 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 Ronald Ortizo prescribe under Medicare Part D?
In 2024, Ronald Ortizo had 1,554 Medicare Part D claims for 590 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.