Nisha K. Chauhan, MD

Medicare activity in 2024

Official CMS public-use data for Nisha K. Chauhan, 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. Emergency department visit with moderate level of medical decision making (99284)19 services
2. Emergency department visit with high level of medical decision making (99285)14 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 cholesterol67%
• Diabetes64%
• Chronic kidney disease48%
• Arthritis39%
• Ischemic heart disease39%

Hospitals where Nisha K. Chauhan works

Medicare's Facility Affiliation Data lists Nisha K. Chauhan 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.

• Kaiser Foundation Hospital - Walnut CreekWalnut Creek, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050072
• Kaiser Foundation Hospital and Rehab CenterVallejo, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 050073

Practice locations

Addresses where Nisha K. Chauhan is enrolled with Medicare (CMS data updated October 2, 2026).

• 975 Sereno DrVallejo, CA 94589 (707) 651‑1000

Group practices

Medicare enrollment lists Nisha K. Chauhan as a member of this group (CMS data updated October 2, 2026).

• Permanente Medical Group Inc10,996 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in California →

Other emergency medicine doctors in Vallejo

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

• Mikaela T. Middleton, MD
• Valerie R. Chavez-Flores, MD
• Elizabeth Ito, MD
• Kellen T. Galster, MD
• Neil L. Markus, DO
• Kyle A. Drullinger, MD
• Marek K. Banas, DO
• Noumi Chowdhury, MD

All emergency medicine doctors in Vallejo →

Other clinicians in Permanente Medical Group Inc

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

• Simonetta Belant, CNA
• Janine C. Richardson, DO
• Alice W. Lin, DO
• Majid Jaberzadeh Ansari
• Peter S. Kim, MD
• Masood Younus, 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