Amitabha Mazumder, M.D.
NPI 1881682318 · Hematology & Oncology Physician · Downey, CA
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Amitabha Mazumder, M.D. is a Hematology & Oncology Physician provider in Downey, CA (NPI 1881682318).
Provider details
- NPI number
- 1881682318
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 209802 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
364 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 | 150 | $140 |
| Enhancing Oncology Model (eom) Monthly Enhanced Oncology Services (meos) Payment for Eom Enhanced ServicesM0010 | 117 | $87 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 63 | $106 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Additional Sequential Infusion, 1 Hour Or Less96367 | 23 | $33 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 11 | $178 |
Typical Medicare-allowed amounts for these services range $33–$178 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 34 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 148 | 48 |
| Prednisone | 81 | 25 |
| Alendronate Sodium | 67 | 23 |
| Relugolixbrand: Orgovyx | 59 | — |
| Abiraterone Acetate | 56 | 12 |
| Letrozole | 45 | 11 |
| Bicalutamide | 44 | — |
| Pamidronate Disodium | 39 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$5,998 across 204 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 (2)
- 1510 S Central Ave Ste 240Glendale, CA 91204-2570Phone: (818) 334-5425
- 160 E 34th StFl 7New York, NY 10016-4744Phone: (212) 731-5196Fax: (212) 731-5540
Registry dates
- Enumerated
- 2005-10-10
- Last updated
- 2018-08-14
Frequently asked questions
- What is Amitabha Mazumder's NPI number?
- Amitabha Mazumder's National Provider Identifier (NPI) is 1881682318, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Amitabha Mazumder's specialty?
- Amitabha Mazumder is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Amitabha Mazumder located?
- Amitabha Mazumder's practice location on file with NPPES is 11480 Brookshire Ave Ste 309, Downey, CA 90241.
- What is Amitabha Mazumder's phone number?
- The practice phone number listed in the NPPES registry for Amitabha Mazumder is (562) 869-1201.
- Does Amitabha Mazumder accept Medicare?
- Amitabha Mazumder is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Amitabha Mazumder's NPI active?
- Yes — Amitabha Mazumder's NPI (1881682318) is active in the NPPES registry as of the last update on 2018-08-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.