Robert Wallerstein, MD
NPI 1285696203 · Pediatrics Physician · Monrovia, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Wallerstein, MD is a Pediatrics Physician provider in Monrovia, CA (NPI 1285696203).
Provider details
- NPI number
- 1285696203
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G88350 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
11 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 11 | $202 |
Typical Medicare-allowed amounts for these services range $202–$202 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 1441 Kapiolani BlvdSuite 1800Honolulu, HI 96814-4402Phone: (808) 973-3403Fax: (808) 973-3401
Registry dates
- Enumerated
- 2006-04-05
- Last updated
- 2019-05-16
Frequently asked questions
- What is Robert Wallerstein's NPI number?
- Robert Wallerstein's National Provider Identifier (NPI) is 1285696203, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Wallerstein's specialty?
- Robert Wallerstein is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Wallerstein located?
- Robert Wallerstein's practice location on file with NPPES is 655 E Huntington Dr, Monrovia, CA 91016.
- What is Robert Wallerstein's phone number?
- The practice phone number listed in the NPPES registry for Robert Wallerstein is (626) 471-7455.
- Does Robert Wallerstein accept Medicare?
- Robert Wallerstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Wallerstein's NPI active?
- Yes — Robert Wallerstein's NPI (1285696203) is active in the NPPES registry as of the last update on 2019-05-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.