Hiroshi Yamagata, MD
NPI 1871948950 · Hematology & Oncology Physician · Cerritos, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hiroshi Yamagata, MD is a Hematology & Oncology Physician provider in Cerritos, CA (NPI 1871948950).
Provider details
- NPI number
- 1871948950
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A185183 (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
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
401 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 | 137 | $130 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 77 | $17 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 54 | $138 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Additional Sequential Infusion, 1 Hour Or Less96367 | 42 | $30 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 30 | $78 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 145 | 47 |
| Ondansetron Hcl | 57 | 35 |
| Prednisone | 41 | 11 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 41 | 23 |
| Hydroxyurea | 34 | — |
| Olanzapine | 34 | 12 |
| Letrozole | 25 | 11 |
| Bicalutamide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$6,460 across 271 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
- 2016-04-26
- Last updated
- 2023-08-10
- Certified
- 2023-08-10
Frequently asked questions
- What is Hiroshi Yamagata's NPI number?
- Hiroshi Yamagata's National Provider Identifier (NPI) is 1871948950, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hiroshi Yamagata's specialty?
- Hiroshi Yamagata is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Hiroshi Yamagata located?
- Hiroshi Yamagata's practice location on file with NPPES is 18000 Studebaker Rd Ste 800, Cerritos, CA 90703-2671.
- What is Hiroshi Yamagata's phone number?
- The practice phone number listed in the NPPES registry for Hiroshi Yamagata is (562) 735-3226.
- Does Hiroshi Yamagata accept Medicare?
- Hiroshi Yamagata is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hiroshi Yamagata's NPI active?
- Yes — Hiroshi Yamagata's NPI (1871948950) is active in the NPPES registry as of the last update on 2023-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.