Mary C. Hannon, MD

Medicare activity in 2024

Official CMS public-use data for Mary C. Hannon, 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 low level od decision making, if using time, 20 minutes or more (99213)321 services
2. Detection test by immunoassay with direct visual observation for influenza virus (87804)150 services
3. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)109 services
4. X-ray of chest, 2 views (71046)108 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)103 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 pressure73%
• Arthritis46%
• Diabetes27%
• Chronic kidney disease24%
• Ischemic heart disease22%

Hospitals where Mary C. Hannon works

Medicare's Facility Affiliation Data lists Mary C. Hannon 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.

• Torrance Memorial Medical CenterTorrance, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050351

Practice locations

Addresses where Mary C. Hannon is enrolled with Medicare (CMS data updated October 2, 2026).

• 2900 Lomita BlvdTorrance, CA 90505 (310) 257‑7260
• 435 N Roxbury Dr, Suite 207Beverly Hills, CA 90210 (310) 362‑3099
• 855 Manhattan Beach Blvd, Suite 101Manhattan Beach, CA 90266 (310) 939‑7873

Group practices

Medicare enrollment lists Mary C. Hannon as a member of this group (CMS data updated October 2, 2026).

• Torrance Health Association Inc299 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in California →

Other emergency medicine doctors in Torrance

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

• Frederick Levin, MD
• John G. Wallace Jr., MD
• Jessica Z. Smeaton, MD
• Simon Chi, DO
• Ryan C. Passaro, MD
• Alexandra N. Grossman, MD
• David M. Scherer, MD
• Tyler S. Leppek, MD

All emergency medicine doctors in Torrance →

Other clinicians in Torrance Health Association Inc

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

• Sagar V. Patel, MD
• Nicole D. Lee, MD
• Jennifer Baars, MD
• Ankush Chhabra, MD
• John P. Andrawis, MD
• Lynn M. Morton

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