Quick answers
- Does Ronald W. Miller accept Medicare assignment?
- Yes. Medicare's clinician data says Ronald W. Miller accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Ronald W. Miller see?
- In 2024, CMS data shows 84 Original Medicare patients and 1,783 services for Ronald W. Miller. This counts Original Medicare only and measures volume, not quality.
- What is Ronald W. Miller's NPI number?
- 1164503926. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Ronald W. Miller, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 84 |
|---|---|
| Services billed to Medicare | 1,783 |
| Different services or procedures | 105 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Most frequent services
- Insertion of needle into vein for collection of blood sample (36415)198 services
- Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)185 services
- Blood test, comprehensive group of blood chemicals (80053)158 services
- Telephone medical discussion with physician, 21-30 minutes (99443)110 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)104 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure74%
- High cholesterol63%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)49%
- Diabetes42%
- Arthritis38%
- Chronic kidney disease26%
Practice locations
Addresses where Ronald W. Miller is enrolled with Medicare (CMS data updated October 2, 2026).
- 335 E Ave ILancaster, CA 93535 (661) 471‑4232
Group practices
Medicare enrollment lists Ronald W. Miller as a member of this group (CMS data updated October 2, 2026).
- County of Los Angeles397 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Medical Oncologyalso
Other hematologist-oncologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in County of Los Angeles
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Columbia University College Of Physicians And Surgeons |
| Graduation year | 1979 (47 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164503926 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians