Benjamin Leach, M.D.
NPI 1497026140 · Hematology & Oncology Physician · Mission Hills, CA
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Benjamin Leach, M.D. is a Hematology & Oncology Physician provider in Mission Hills, CA (NPI 1497026140).
Provider details
- NPI number
- 1497026140
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A122493 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,491 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 436 | $142 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 363 | $153 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 350 | $18 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 338 | $199 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 224 | $16 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 196 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 101 | 23 |
| Apixabanbrand: Eliquis | 88 | 21 |
| Ondansetron Hcl | 55 | 33 |
| Dexamethasone | 51 | 25 |
| Osimertinib Mesylatebrand: Tagrisso | 46 | — |
| Prednisone | 38 | — |
| Famotidine | 37 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$5,467 across 10 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
Additional practice locations (1)
- 1100 San Bernardino RoadSuite 1100Upland, CA 91786-4952Phone: (909) 949-2242Fax: (909) 981-5783
Registry dates
- Enumerated
- 2012-01-25
- Last updated
- 2020-11-11
- Certified
- 2020-11-11
Frequently asked questions
- What is Benjamin Leach's NPI number?
- Benjamin Leach's National Provider Identifier (NPI) is 1497026140, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Benjamin Leach's specialty?
- Benjamin Leach is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Benjamin Leach located?
- Benjamin Leach's practice location on file with NPPES is 15031 Rinaldi St Ste 150, Mission Hills, CA 91345-1207.
- What is Benjamin Leach's phone number?
- The practice phone number listed in the NPPES registry for Benjamin Leach is (818) 660-4700.
- Does Benjamin Leach accept Medicare?
- Benjamin Leach is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Benjamin Leach's NPI active?
- Yes — Benjamin Leach's NPI (1497026140) is active in the NPPES registry as of the last update on 2020-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.