Ronald J. Otto, MD
Diagnostic Radiology Physician · Riverside, CA
Ronald J. Otto, MD is a diagnostic radiology physician with a practice address in Riverside, California, and NPI 1710988647, issued on Aug 2, 2005. Check the license (California G51511, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald J. Otto
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- G51511 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4445 Magnolia Ave, Riverside, CA 92501
- Phone
- (951) 788-3400
- Enumerated
- Aug 2, 2005
- Record last updated
- Jun 16, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (951) 788-3194
- Medicaid IDs
- 00G515110 CA
009515110 CA - Medicare enrollment
- Enrolled (PECOS I20070313000296); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1982
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 4445 Magnolia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joey Abadilla, MDStudent in an Organized Health Care Education/Training Program1093417818
- Rashed AbdelaalDiagnostic Radiology Physician1518726090
- Ahmed Abdelhalim, MDDiagnostic Radiology Physician1275162927
- Nirusha AbeydeeraStudent in an Organized Health Care Education/Training Program1295354454
- Alyssa Aboff, CRNA, DNPCertified Registered Nurse Anesthetist1760133292
- Brandon Abrajan, DOStudent in an Organized Health Care Education/Training Program1861141186
Verify Ronald J. Otto in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G51511Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 7 group practices
- Beverly Radiology Medical Group IIICorona, CA
- Desert Advanced Imaging Medical CenterPalm Springs, CA
- Fresno Imaging CenterFresno, CA
- Kern Radiology Medical Group IncBakersfield, CA
- Modesto Advanced Diagnostic Imaging Medical CenterModesto, CA
- Norcal ImagingFremont, CA
- Southern Mono Health Care DistrictMammoth Lakes, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald J. Otto among 4,500 diagnostic radiology physician records in California
Ronald J. Otto, MD is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1982 · median 2004 among the 3,130 with a school on file
- Record last updated2008 · 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 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in California
There are 4,500 diagnostic radiology physician records in California.
All 4,500 in California → Every provider in Riverside → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Ardavan Afshar, MDRiverside, CA 925011063413920
- Matthew Dopp, MDRiverside, CA 925011922502343
- David Lebeau, MDRiverside, CA 925011356423339
- Donald Massee, MDRiverside, CA 925011801897731
- Arianna McGehee, ARIANNARiverside, CA 925011912535394
- Jerry Nam, MDRiverside, CA 925011972565000
- Trinh NguyenRiverside, CA 925011568816858
- Raymond Sakover, MDRiverside, CA 925011578564431
Common questions
What is Ronald J. Otto, MD's NPI number?
Ronald J. Otto, MD's National Provider Identifier (NPI) is 1710988647, issued on Aug 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ronald J. Otto, MD located?
The NPPES record lists a practice address at 4445 Magnolia Ave, Riverside, CA, 92501. Phone: (951) 788-3400. Providers update this record themselves, so call before visiting.
How can I verify Ronald J. Otto, MD's license?
NPPES lists California license number G51511, 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.
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.