Quick answers
- Does Ruben M. Ruiz Iii accept Medicare assignment?
- Yes. Medicare's clinician data says Ruben M. Ruiz Iii 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 Ruben M. Ruiz Iii see?
- In 2024, CMS data shows 127 Original Medicare patients and 1,968 services for Ruben M. Ruiz Iii. This counts Original Medicare only and measures volume, not quality.
- What is Ruben M. Ruiz Iii's NPI number?
- 1699701581. 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 Ruben M. Ruiz Iii, 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 | 127 |
|---|---|
| Services billed to Medicare | 1,968 |
| Different services or procedures | 36 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)479 services
- Injection of drug or substance under skin or into muscle (96372)327 services
- Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg (J3420)312 services
- Insertion of needle into vein for collection of blood sample (36415)225 services
- Blood test, lipids (cholesterol and triglycerides) (80061)149 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 pressure75%
- High cholesterol75%
- Diabetes69%
- Arthritis53%
- Chronic kidney disease41%
- Depression37%
Practice locations
Addresses where Ruben M. Ruiz Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 3012 San Gabriel BlvdRosemead, CA 91770 (626) 572‑8692
- 3342 Whittier BlvdLos Angeles, CA 90023 (323) 267‑1214
Specialties
- Family Practiceprimary
Other family doctors in Rosemead
Clinicians with the same Medicare primary specialty in Rosemead, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Temple University School Of Medicine |
| Graduation year | 1996 (30 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1699701581 |
| 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