Lionel P. Nelson, MD

Medicare activity in 2024

Official CMS public-use data for Lionel P. Nelson, 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.

Most frequent services

1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)163 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)152 services
3. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)90 services
4. Diagnostic exam of voice box using a flexible endoscope (31575)70 services
5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)59 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 cholesterol75%
• High blood pressure71%
• Arthritis44%
• Ischemic heart disease31%
• Diabetes25%
• Osteoporosis20%

Hospitals where Lionel P. Nelson works

Medicare's Facility Affiliation Data lists Lionel P. Nelson at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• El Camino HealthMountain View, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050308

Practice locations

Addresses where Lionel P. Nelson is enrolled with Medicare (CMS data updated October 2, 2026).

• 15899 Los Gatos Almaden Rd, Suite 12Los Gatos, CA 95032 (408) 358‑2663
• 2577 Samaritan Dr, Suite 765San Jose, CA 95124 (408) 358‑6163
• 365 Lennon LnWalnut Creek, CA 94598

Group practices

Medicare enrollment lists Lionel P. Nelson as a member of this group (CMS data updated October 2, 2026).

• Bass Medical Group291 clinicians in the group

Specialties

• Otolaryngologyprimary

Find other Otolaryngology doctors in California →

Other ENT doctors in Los Gatos

Clinicians with the same Medicare primary specialty in Los Gatos, CA — not a recommendation.

• Michelle M. Inserra, MD
• Hussein A. Samji, MD
• Margaret S. Carter, MD
• Jennifer L. Maw, MD
• Mauro B. Ruffy Jr., MD
• Hamed Sajjadi, MD

All ENT doctors in Los Gatos →

Other clinicians in Bass Medical Group

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Stephen J. Sims, MD
• Jaisri T. Maharaj, MD
• Avery Joseph, DO
• Silpa Jetty, MD
• Jonathan Humphrey, MD
• Ian A. Stine, MD

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians