Gary T. Tanouye, MD

Medicare activity in 2024

Official CMS public-use data for Gary T. Tanouye, 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)783 services
2. Blood test, comprehensive group of blood chemicals (80053)659 services
3. Insertion of needle into vein for collection of blood sample (36415)534 services
4. Measurement c-reactive protein for detection of infection or inflammation, high sensitivity (86141)502 services
5. Hemoglobin a1c level (83036)479 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 pressure69%
• Arthritis59%
• Ischemic heart disease26%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)19%
• Diabetes18%

Hospitals where Gary T. Tanouye works

Medicare's Facility Affiliation Data lists Gary T. Tanouye 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.

• Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050625

Practice locations

Addresses where Gary T. Tanouye is enrolled with Medicare (CMS data updated October 2, 2026).

• 18133 Ventura Blvd, Suite 300Tarzana, CA 91356 (818) 994‑0101
• 5411 Etiwanda AveTarzana, CA 91356 (424) 314‑0125
• 5525 Etiwanda Ave, Suite 320Tarzana, CA 91356 (818) 774‑3839
• 8635 W 3rd St, Suite 465wLos Angeles, CA 90048 (310) 423‑0674

Group practices

Medicare enrollment lists Gary T. Tanouye as a member of this group (CMS data updated October 2, 2026).

• Cedars-Sinai Medical Care Foundation1,692 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Tarzana

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

• Michelle S. Shukhman, DO
• Mehul A. Thakkar, MD
• Mahbod Paya, MD
• Shawn J. Younessi, MD
• Shahin Delkhah, MD
• Jeffrey E. Galpin, MD
• Seyedmohsen Nourbakhsh, MD
• E Duane Carmalt, MD

All internal medicine doctors in Tarzana →

Other clinicians in Cedars-Sinai Medical Care Foundation

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

• Andrew D. Lin, MD
• Olivia Kaminsky, MD
• Alison J. Atkinson, NP
• Raffaele Rocco, MD
• Alexander Polyak, MD
• Sho Tanaka, 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