Robert Joseph Wallerstein, MD - Medicare Pediatric Medicine in Monrovia, CA

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Robert Joseph Wallerstein, MD is a medicare enrolled "Pediatrics" physician in Monrovia, California. He graduated from medical school in 1991 and has 35 years of diverse experience with area of expertise as Pediatric Medicine. He is a member of the group practice University Of California San Francisco and his current practice location is 655 E Huntington Dr, Monrovia, California. You can reach out to his office (for appointments etc.) via phone at (626) 471-7455.

Robert Joseph Wallerstein is licensed to practice in California (license number G88350) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1285696203.

Contact Information

Robert Joseph Wallerstein, MD
655 E Huntington Dr,
Monrovia, CA 91016
(626) 471-7455
Not Available

Map and Direction




Physician's Profile

Full NameRobert Joseph Wallerstein
GenderMale
SpecialityPediatric Medicine
Experience35 Years
Location655 E Huntington Dr, Monrovia, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Robert Joseph Wallerstein graduated from medical school in 1991
  NPI Data:
  • NPI Number: 1285696203
  • Provider Enumeration Date: 04/05/2006
  • Last Update Date: 05/16/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 2860674066
  • Enrollment ID: I20110309000631

Medical Identifiers

Medical identifiers for Robert Joseph Wallerstein such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1285696203NPI-NPPES
01704714MedicaidNY

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207SG0201XMedical Genetics - Clinical Genetics (m.d.) G88350 (California)Secondary
208000000XPediatrics G88350 (California)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
University Of California San Francisco44865672291780

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Robert Joseph Wallerstein allows following entities to bill medicare on his behalf.
Entity NameUCSF Pediatrics Associates
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1376614016
PECOS PAC ID: 6204749112
Enrollment ID: O20031106000823
Entity NameUniversity of California San Francisco
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1861578973
PECOS PAC ID: 4486567229
Enrollment ID: O20031212000897
Entity NameCounty of Santa Clara
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1699885079
PECOS PAC ID: 1254244973
Enrollment ID: O20040113000784
Entity NameUCSF Medical Group Business Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1477624104
PECOS PAC ID: 3779497870
Enrollment ID: O20040622001513

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Robert Joseph Wallerstein is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Robert Joseph Wallerstein, MD
16557 Marchmont Dr,
Los Gatos, CA 95032-5606

Ph: (408) 335-8449		Robert Joseph Wallerstein, MD
655 E Huntington Dr,
Monrovia, CA 91016

Ph: (626) 471-7455

Reviews and Comments



Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.