Helen Moon, M.D.
NPI 1255480075 · Hematology & Oncology Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Helen Moon, M.D. is a Hematology & Oncology Physician provider in Pasadena, CA (NPI 1255480075).
Provider details
- NPI number
- 1255480075
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A91007 (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 tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 187 | 63 |
| Abiraterone Acetate | 120 | 17 |
| Prednisone | 89 | 29 |
| Ondansetron Hcl | 62 | 26 |
| Lenalidomide | 58 | — |
| Dexamethasone | 41 | 11 |
| Hydroxyurea | 39 | 16 |
| Letrozole | 30 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$217 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-10
- Last updated
- 2021-11-01
- Certified
- 2021-11-01
Frequently asked questions
- What is Helen Moon's NPI number?
- Helen Moon's National Provider Identifier (NPI) is 1255480075, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Helen Moon's specialty?
- Helen Moon is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Helen Moon located?
- Helen Moon's practice location on file with NPPES is 393 E Walnut St Fl 3, Pasadena, CA 91188-0001.
- What is Helen Moon's phone number?
- The practice phone number listed in the NPPES registry for Helen Moon is (951) 353-4931.
- Does Helen Moon accept Medicare?
- Helen Moon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Helen Moon's NPI active?
- Yes — Helen Moon's NPI (1255480075) is active in the NPPES registry as of the last update on 2021-11-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.