Ronald Steven Mandel, D.O.
Family Medicine Physician · Aliso Viejo, CA
Ronald Steven Mandel, D.O. is a family medicine physician with a practice address in Aliso Viejo, California, and NPI 1659335420, issued on Apr 17, 2006. Check the license (California 20A4149, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald Steven Mandel
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A4149 CA
Self-reported in NPPES; status is on the state search - Practice location
- 24502 Pacific Park Dr, Aliso Viejo, CA 92656
- Phone
- (949) 362-2121
- Enumerated
- Apr 17, 2006
- Record last updated
- Jul 16, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid IDs
- 00AX41490 CA
00AX4490 CA - Medicare enrollment
- Enrolled (PECOS I20111213000869); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1975
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 24502 Pacific Park Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Chad Abbott, MDFamily Medicine Physician1285831602
- Elizabeth Dempsey, LCSWClinical Social Worker1437730405
- Kamran Ghodsian, M.D.Specialist1942204409
- Howard Goldman, RPHPharmacist1972041077
- Jesse Johnson, DDSDentist1306003355
- Matt Johnson, D.D.S.General Practice Dentistry1942580014
Verify Ronald Steven Mandel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A4149Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average family medicine physician in 2024
3,626 Medicare Part D claims for 231 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 216 claims were for opioids.
Most prescribed
- Atorvastatin Calcium166 claims
- Losartan Potassium122 claims
- Amlodipine Besylate109 claims
- Montelukast Sodium108 claims
- Ozempic96 claims
- Gabapentin95 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: $858.73
48 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 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.
Ronald Steven Mandel among 17,133 family medicine physician records in California
Ronald Steven Mandel, D.O. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1975 · median 2005 among the 10,652 with a school on file
- Record last updated2009 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 family medicine physician records list a practice address in Aliso Viejo
They are 17 of the 568 NPPES records with a practice address in Aliso Viejo, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Aliso Viejo → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Chad Abbott, MDAliso Viejo, CA 926561285831602
- Anna Askari, MDAliso Viejo, CA 926561124515341
- Aaron Boor, D.O.Aliso Viejo, CA 926561598727216
- Kahesha Franklin, M.D.Aliso Viejo, CA 926561033493424
- Brian Hauser, M.D.Aliso Viejo, CA 926561982674438
- Amir JourabchiAliso Viejo, CA 926561184159337
- Tanushree Nair, DOAliso Viejo, CA 926561437730876
- Thu Nguyen, MDAliso Viejo, CA 926561114422888
Common questions
What is Ronald Steven Mandel, D.O.'s NPI number?
Ronald Steven Mandel, D.O.'s National Provider Identifier (NPI) is 1659335420, issued on Apr 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Steven Mandel, D.O. located?
The NPPES record lists a practice address at 24502 Pacific Park Dr, Aliso Viejo, CA, 92656. Phone: (949) 362-2121. Providers update this record themselves, so call before visiting.
How can I verify Ronald Steven Mandel, D.O.'s license?
NPPES lists California license number 20A4149, 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 Steven Mandel, D.O. prescribe under Medicare Part D?
In 2024, Ronald Steven Mandel, D.O. had 3,626 Medicare Part D claims for 231 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.