Leroy Wayne Keiser, M.D.
Leroy Wayne Keiser is a Hematology & Oncology specialist based in Santa Rosa, CA with over 53 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Also practices: INTERNAL MEDICINE
Leroy Wayne Keiser, M.D. has practiced internal medicine for 53+ years, working in group practice. A Stanford University School of Medicine graduate since 1973, he brings 53+ years of experience. He regularly sees Medicare patients with high cholesterol, hypertension, and cancer (per CMS claims data).
Older · 1662dNPPES updated 2021-11-03 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
3555 Round Barn Cir Ste 100, Santa Rosa, CA 95403-1757
How Does This Doctor Compare?
Opioid Rx
↓ Lower = better8.11%
California avg: 5.2 · US avg: 5.1
⚠ Lower than most doctors nationally(+3 pts)
8.11% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Medicare Patients
597
Unique beneficiaries
High volumePrescription Recipients
328
Patients prescribed
Prescriptions Written
1,344
Total claims
Total Medicare drug cost: $3.77M
Percentile rankings compared against 9,360 reporting peers in California.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages High Cholesterol, Hypertension, and Cancer.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↓ Fewer patients than average (-3%) — less common here
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-5%) — less common here
Diseases involving abnormal cell growth with potential to spread to other body parts
US avg: 20.8%↑ More patients than average (+26%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-7%) — less common here
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↓ Fewer patients than average (-1%) — less common here
Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+9%) — a focus area for this doctor
Conditions affecting emotional state, including depression and bipolar disorder
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-9%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$16.8k received from industry
16 transactions reported in 2024 ·High tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Leroy Wayne Keiser's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1973
Stanford University School of Medicine
Board certified · Nov 2, 2021
Self-reported via NPPES
53 years in practice
Senior practitioner
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Taxonomy: 207RH0003X
Education & Training
Stanford University School of Medicine (Class of 1973)
Mailing address
3555 Round Barn Cir, Santa Rosa, CA 95403-1757
Differs from practice location
Primary hospital affiliation: Acute Care Hospitals
CMS Certification Number: 190111
View hospital on Medicare Care CompareVirtual Hematology & Oncology Care With Leroy Wayne Keiser
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Leroy Wayne Keiser for cholesterol management, blood pressure monitoring, follow-up consultations — no travel to Santa Rosa required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Leroy Wayne Keiser
Dr. Keiser is listed as active in the NPI registry with telehealth listed in Santa Rosa, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (707) 528-1050.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Leroy Wayne Keiser
Practice Location
3555 Round Barn Cir Ste 100, Santa Rosa, CA 95403-1757
Mailing Address
3555 Round Barn Cir, Santa Rosa, CA 95403-1757
This is a provider directory. Contact the office directly to schedule appointments.
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