Howard Fellows, M.D.
NPI 1659365526 · Hematology & Oncology Physician · Downey, CA
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Howard Fellows, M.D. is a Hematology & Oncology Physician provider in Downey, CA (NPI 1659365526).
Provider details
- NPI number
- 1659365526
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 39213 (IA)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
896 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 | 484 | $94 |
| 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 | 195 | $16 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 138 | $141 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 30 | $131 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 25 | $179 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 33 | 14 |
| Hydroxyurea | 30 | — |
| Acyclovir | 29 | — |
| Potassium Chloride | 27 | 12 |
| Trifluridine/Tipiracil Hclbrand: Lonsurf | 26 | — |
| Tamoxifen Citrate | 24 | 12 |
| Prednisone | 19 | — |
| Hydrocodone/Acetaminophen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$71 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
- 2005-09-07
- Last updated
- 2022-07-21
- Certified
- 2021-10-22
Frequently asked questions
- What is Howard Fellows's NPI number?
- Howard Fellows's National Provider Identifier (NPI) is 1659365526, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Howard Fellows's specialty?
- Howard Fellows is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Howard Fellows located?
- Howard Fellows's practice location on file with NPPES is 11480 Brookshire Ave Ste 309, Downey, CA 90241-5025.
- What is Howard Fellows's phone number?
- The practice phone number listed in the NPPES registry for Howard Fellows is (562) 869-1201.
- Does Howard Fellows accept Medicare?
- Howard Fellows is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Howard Fellows's NPI active?
- Yes — Howard Fellows's NPI (1659365526) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.