Shannon Kogachi, MD

Medicare activity in 2024

Official CMS public-use data for Shannon Kogachi, 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 35 minutes (99232)822 services
2. Hospital discharge day management, more than 30 minutes (99239)204 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)154 services
4. Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)24 services
5. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)13 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%
• Arthritis68%
• Ischemic heart disease54%
• Chronic kidney disease45%
• Depression44%

Hospitals where Shannon Kogachi works

Medicare's Facility Affiliation Data lists Shannon Kogachi 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.

• Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050290

Practice locations

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

• 2121 Santa Monica BlvdSanta Monica, CA 90404 (310) 829‑5511

Group practices

Medicare enrollment lists Shannon Kogachi as a member of this group (CMS data updated October 2, 2026).

• Providence Saint Johns Medical Foundation281 clinicians in the group

Specialties

• Hospitalistprimary
• Internal Medicinealso

Find other Hospitalist doctors in California →

Other hospitalists in Santa Monica

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

• James R. Antaki, MD
• Corey Mordas, MD
• Michael J. Eller, MD
• Bryan G. Lopez, MD
• Agnieszka Gryguc-Saxanoff, MD
• Jessica J. Antillon, MD
• Shawna E. Chagoury, MD
• Sneha Jain, MD

All hospitalists in Santa Monica →

Other clinicians in Providence Saint Johns Medical Foundation

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

• Erica M. Quenville, PA
• Marissa L. Zobrist, MD
• Matthew K. Nienaber, DO
• Maia A. Aronson
• Oren S. Raphael, MD
• Yvonne Bohn, 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