Leroy Wayne Keiser, M.D.
NPI 1417047283 · Hematology & Oncology Physician · Santa Rosa, CA
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leroy Wayne Keiser, M.D. is a Hematology & Oncology Physician provider in Santa Rosa, CA (NPI 1417047283).
Provider details
- NPI number
- 1417047283
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G28436 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
2,611 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 | 993 | $139 |
| 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 | 718 | $17 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 376 | $139 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 347 | $195 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 89 | $122 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 70 | 21 |
| Letrozole | 50 | 22 |
| Prednisone | 42 | 20 |
| Dexamethasone | 39 | 18 |
| Darolutamidebrand: Nubeqa | 37 | — |
| Prochlorperazine Maleate | 33 | 21 |
| Abiraterone Acetate | 32 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$16,832 across 16 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
- 2006-10-13
- Last updated
- 2021-11-03
- Certified
- 2021-11-03
Frequently asked questions
- What is Leroy Wayne Keiser's NPI number?
- Leroy Wayne Keiser's National Provider Identifier (NPI) is 1417047283, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leroy Wayne Keiser's specialty?
- Leroy Wayne Keiser is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Leroy Wayne Keiser located?
- Leroy Wayne Keiser's practice location on file with NPPES is 3555 Round Barn Cir Ste 100, Santa Rosa, CA 95403-1757.
- What is Leroy Wayne Keiser's phone number?
- The practice phone number listed in the NPPES registry for Leroy Wayne Keiser is (707) 528-1050.
- Does Leroy Wayne Keiser accept Medicare?
- Leroy Wayne Keiser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leroy Wayne Keiser's NPI active?
- Yes — Leroy Wayne Keiser's NPI (1417047283) is active in the NPPES registry as of the last update on 2021-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.