Nader Mirhoseni, MD

Medicare activity in 2024

Official CMS public-use data for Nader Mirhoseni, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)450 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)318 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)157 services
4. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)140 services
5. Biopsy of large bowel using a flexible endoscope (45380)124 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%
• Arthritis49%
• Diabetes40%
• Ischemic heart disease38%
• Chronic kidney disease35%

Hospitals where Nader Mirhoseni works

Medicare's Facility Affiliation Data lists Nader Mirhoseni 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.

• Providence Mission HospitalMission Viejo, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050567
• Providence Queen of the Valley Medical CenterNapa, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050009
• Sharp Chula Vista Medical CenterChula Vista, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050222
• Sharp Coronado Hospital and Healthcare CenterCoronado, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050234
• Sharp Memorial HospitalSan Diego, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050100

Practice locations

Addresses where Nader Mirhoseni is enrolled with Medicare (CMS data updated October 2, 2026).

• 1000 Trancas StNapa, CA 94558 (707) 252‑4411
• 26691 Plaza, Suite 150Mission Viejo, CA 92691 (949) 348‑2900
• 7901 Frost StSan Diego, CA 92123 (858) 939‑3400
• 8860 Ctr Dr, Suite 420La Mesa, CA 91942 (619) 469‑5400

Group practices

Medicare enrollment lists Nader Mirhoseni as a member of these groups (CMS data updated October 2, 2026).

• Providence Medical Foundation1,466 clinicians in the group
• Emergency and Acute Care Medical Corporation422 clinicians in the group
• Western Gastroenterology Care Associates Inc6 clinicians in the group

Specialties

• Gastroenterologyprimary
• Internal Medicinealso

Find other Gastroenterology doctors in California →

Other gastroenterologists in Napa

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

• Ali Banaie, MD
• Ali S. Vaziri, MD
• Laura Pestana, DO
• Shahram Javaheri, MD
• Brett J. Partridge, MD

All gastroenterologists in Napa →

Other clinicians in Providence Medical Foundation

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

• Wishanth R. Gooneratne, MD
• Harshal B. Bhakta, MD
• Natalie P. Valle, NP
• Michael P. Truong, MD
• Jerry F. Tsai, MD
• Luiza Mnatsakanyan, DO

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