Ronald W. Cotliar, M.D.
Pediatrics Physician · Tustin, CA
Ronald W. Cotliar, M.D. is a pediatrics physician with a practice address in Tustin, California, and NPI 1932192572, issued on Aug 30, 2005. Check the license (California G25069, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald W. Cotliar
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- G25069 CA
Self-reported in NPPES; status is on the state search - Practice location
- 13420 Newport Ave, Tustin, CA 92780
- Phone
- (714) 731-0061
- Enumerated
- Aug 30, 2005
- Record last updated
- Sep 20, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (714) 731-0164
- Medicare enrollment
- Enrolled (PECOS I20081217000103); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 1972
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 13420 Newport Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ronald W. Cotliar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G25069Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 80.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- UC RegentsLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald W. Cotliar among 9,272 pediatrics physician records in California
Ronald W. Cotliar, M.D. is one of 9,272 pediatrics physician records with a practice address in California. 31% 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, 96% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileYes · 8% of these records are
- Graduated1972 · median 2012 among the 754 with a school on file
- Record last updated2012 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatrics Physician providers in California
There are 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in Tustin → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Calvin Chen, MDTustin, CA 927801831168111
- Aleen Chin, MDTustin, CA 927801912221656
- Angela Dangvu, MDTustin, CA 927801841234978
- Usha Ganesan, M.D.Tustin, CA 927801659391134
- Paul Genser, M.D.Tustin, CA 927801154410629
- Lowell Gordon, M.D.Tustin, CA 927801548248065
- Valeria Kozak, MDTustin, CA 927801720057516
- Carlos Martinez, M.D.Tustin, CA 927801871741850
Common questions
What is Ronald W. Cotliar, M.D.'s NPI number?
Ronald W. Cotliar, M.D.'s National Provider Identifier (NPI) is 1932192572, issued on Aug 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ronald W. Cotliar, M.D. located?
The NPPES record lists a practice address at 13420 Newport Ave, Tustin, CA, 92780. Phone: (714) 731-0061. Providers update this record themselves, so call before visiting.
How can I verify Ronald W. Cotliar, M.D.'s license?
NPPES lists California license number G25069, 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.
What is Ronald W. Cotliar, M.D.'s MIPS final score?
The 2023 MIPS final score is 80.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.