Quick answers
- Does Nelson R. Maldonado accept Medicare assignment?
- Yes. Medicare's clinician data says Nelson R. Maldonado 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 Nelson R. Maldonado see?
- In 2024, CMS data shows 104 Original Medicare patients and 404 services for Nelson R. Maldonado. This counts Original Medicare only and measures volume, not quality.
- What is Nelson R. Maldonado's NPI number?
- 1508921305. 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 Nelson R. Maldonado, 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 | 104 |
|---|---|
| Services billed to Medicare | 404 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Ultrasound study of arm or leg veins with compression and maneuvers (93970)72 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)49 services
- Injection of chemical agent into single incompetent vein of leg using ultrasound guidance (36465)45 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)40 services
- Injection of chemical agent into multiple incompetent veins of same leg using ultrasound guidance (36466)34 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 cholesterol63%
- Arthritis57%
- Diabetes36%
- Heart failure24%
- Chronic kidney disease21%
Practice locations
Addresses where Nelson R. Maldonado is enrolled with Medicare (CMS data updated October 2, 2026).
- 935 Trancas St, Suite 2cNapa, CA 94558 (707) 252‑4955
Group practices
Medicare enrollment lists Nelson R. Maldonado as a member of this group (CMS data updated October 2, 2026).
- Jeffrey Brooks MD Inc2 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Napa
Clinicians with the same Medicare primary specialty in Napa, CA — not a recommendation.
Other clinicians in Jeffrey Brooks MD Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Irvine, California College Of Medicine |
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508921305 |
| 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