Robert Joseph Wallerstein, MD
Pediatrics Physician · Monrovia, CA
Robert Joseph Wallerstein, MD is a pediatrics physician with a practice address in Monrovia, California, and NPI 1285696203, issued on Apr 5, 2006. Check the license (California G88350, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Joseph Wallerstein
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- G88350 CA
Self-reported in NPPES; status is on the state search - Practice location
- 655 E Huntington Dr, Monrovia, CA 91016
- Phone
- (626) 471-7455
- Enumerated
- Apr 5, 2006
- Record last updated
- May 16, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 01704714 NY
- Medicare enrollment
- Enrolled (PECOS I20110309000631); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 655 E Huntington Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert Joseph Wallerstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G88350Check 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): 74.5 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
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Joseph Wallerstein among 9,272 pediatrics physician records in California
Robert Joseph Wallerstein, MD 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 56% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileYes · 8% of these records are
- Graduated1991 · median 2012 among the 754 with a school on file
- Record last updated2019 · 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 Monrovia → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Anna Mekikyan, M.DMontrose, CA 910201801968169
- Katty Sahakian, M.D.Montrose, CA 910201932399029
- Vigen Zargarian, M.D., M.P.H.Montrose, CA 910201639106230
- Michelle Abajian, MDLa Canada, CA 910111619176757
- Parambir Bhatti, DOLa Canada, CA 910111366023707
- Adrian Castro, M.D.La Canada, CA 910111649430372
- Yee-Jean Chou, MDLa Canada, CA 910111629040431
- Francesca CorleyLa Canada, CA 910111811524242
Common questions
What is Robert Joseph Wallerstein, MD's NPI number?
Robert Joseph Wallerstein, MD's National Provider Identifier (NPI) is 1285696203, issued on Apr 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Joseph Wallerstein, MD located?
The NPPES record lists a practice address at 655 E Huntington Dr, Monrovia, CA, 91016. Phone: (626) 471-7455. Providers update this record themselves, so call before visiting.
How can I verify Robert Joseph Wallerstein, MD's license?
NPPES lists California license number G88350, 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 Robert Joseph Wallerstein, MD's MIPS final score?
The 2023 MIPS final score is 74.5 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.