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ROBERT JOSEPH WALLERSTEIN MD
NPI 1285696203
Pediatrics in Monrovia, CA

Active since April 05, 2006PECOS EnrolledAccepts Medicare Assignment
74.46/100
CMS Quality Rating
655 E HUNTINGTON DR, MONROVIA, CA 91016(626) 471-7455 Get Directions Write a Review

NPPES record last updated: May 16, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 16, 2019, Dec 21, 2016 (2 updates tracked since 2016).

About Robert Joseph Wallerstein Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ROBERT JOSEPH WALLERSTEIN MD (NPI 1285696203) is an individual pediatrics provider in Monrovia, California, licensed in California (G88350) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Honolulu, and is a graduate of Other (1991).

NPPES Registry Identity

NPI1285696203
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameROBERT JOSEPH WALLERSTEINCredential: MD
Location Address655 E HUNTINGTON DRMonrovia, CA 91016
Mailing Address16557 Marchmont DrLos Gatos, CA 95032-5606 · (408) 335-8449
Phone(626) 471-7455
Sole ProprietorNo
Medical School CMSOtherGraduated 1991
Enumeration DateApril 5, 2006
Last NPPES UpdateMay 16, 20192 updates tracked since enumeration
✔ NPI 1285696203 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · G88350
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Also ListedMedical Genetics · Clinical Genetics (M.D.)Taxonomy 207SG0201X · License G88350 (CA)
655 E HUNTINGTON DR, Monrovia, CA 91016
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Secondary Practice Location 1

Location 11441 Kapiolani Blvd, Suite 1800Honolulu, HI 96814-4402 · Phone (808) 973-3403 · Fax (808) 973-3401

Other Identifiers 1

Medicaid01704714NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Robert Joseph Wallerstein Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2860674066
PECOS Enrollment IDI20110309000631
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

5

Medicare enrollment records show Robert Wallerstein reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Providence Facey Medical Foundation
30 mi
Urgent Care
14550 SOLEDAD CANYON RD
Santa Clarita, CA 91387
  • Reassigned Medicare billing, California enrollment
  • 684 clinicians in this Medicare group
NPI 1922651561 (818) 837-5559
County Of Santa Clara
281 mi
Federally Qualified Health Center (FQHC)
7475 CAMINO ARROYO
Gilroy, CA 95020
  • Reassigned Medicare billing, California enrollment
  • 2,460 clinicians in this Medicare group
NPI 1922093533 (408) 885-5000
Ucsf Pediatrics Associates
353 mi
Pediatrics
505 PARNASSUS AVE
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 1,159 clinicians in this Medicare group
NPI 1376614016 (415) 353-2000
University Of California San Francisco
353 mi
Surgery
400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 5,645 clinicians in this Medicare group
NPI 1346329380 (415) 353-2161
Ucsf Medical Group Business Services
353 mi
Internal Medicine
400 PARNASSUS AVE
San Francisco, CA 94122
  • Reassigned Medicare billing, California enrollment
  • 5,544 clinicians in this Medicare group
NPI 1477624104 (415) 353-2808

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91016 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

74.46/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability76
Improvement Activities40
Cost46.68

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BETHANY LARSON BERG MS, MS
Genetic Counselor, MS
655 E HUNTINGTON DR
MONROVIA, CA 91016
Los Angeles County (626) 471-9922
YVONNE REBEKA CARDONA MS
Genetic Counselor, MS
655 E HUNTINGTON DR
MONROVIA, CA 91016
Los Angeles County (626) 471-9922
MR. BENJAMIN EDWARD NEWSUM MS
Genetic Counselor, MS
655 E HUNTINGTON DR
MONROVIA, CA 91016
Los Angeles County (626) 471-7443
TERESA RUEGG MS, MPH
Genetic Counselor, MS
655 E HUNTINGTON DR
MONROVIA, CA 91016
Los Angeles County (800) 426-6467
DR. ATIEH HAJIANPOUR M.D. (IRAN), FACMG
Medical Genetics (Clinical Cytogenetics)
655 E HUNTINGTON DR
MONROVIA, CA 91016
Los Angeles County (800) 255-1616
BRITTANY NOBLE MS
Genetic Counselor, MS
655 E HUNTINGTON DR
MONROVIA, CA 91016
Los Angeles County (626) 471-9922
DR. REZVAN HABIBIAN PH.D
Medical Genetics (Clinical Cytogenetics)
655 E HUNTINGTON DR
MONROVIA, CA 91016
Los Angeles County (626) 471-7507
CORINNE MARIE LEWIS
Genetic Counselor, MS
655 E HUNTINGTON DR
MONROVIA, CA 91016
Los Angeles County (626) 471-9922

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Robert Wallerstein's NPI number?

The NPI number for Robert Wallerstein is 1285696203. It was assigned to this individual provider in the NPPES registry on April 5, 2006.

Where is Robert Wallerstein located?

Robert Wallerstein practices at 655 E Huntington Dr, Monrovia, CA 91016. The listed phone number is (626) 471-7455.

What is Robert Wallerstein's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Robert Wallerstein enrolled in Medicare?

Yes. Robert Wallerstein is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Robert Wallerstein's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Wallerstein reassigns Medicare benefits to 5 organizations: Providence Facey Medical Foundation (Santa Clarita, CA), County Of Santa Clara (Gilroy, CA), Ucsf Pediatrics Associates (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Robert Wallerstein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Robert Wallerstein was last updated on May 16, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.