Mary Louise J. Ferris, MD

Medicare activity in 2024

Official CMS public-use data for Mary Louise J. Ferris, 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)105 services
2. Automated urinalysis test (81003)39 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)37 services
4. Detection test by multiplex amplified probe technique for severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (covid-19), influenza virus types a and b, and respiratory syncytial virus (87637)24 services
5. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)23 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 cholesterol70%
• High blood pressure63%
• Arthritis39%
• Osteoporosis24%
• Ischemic heart disease21%
• Diabetes20%

Hospitals where Mary Louise J. Ferris works

Medicare's Facility Affiliation Data lists Mary Louise J. Ferris 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.

• Peninsula Medical CenterBurlingame, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050007

Practice locations

Addresses where Mary Louise J. Ferris is enrolled with Medicare (CMS data updated October 2, 2026).

• 123 S San Mateo DrSan Mateo, CA 94401 (650) 343‑4200
• 301 Industrial RdSan Carlos, CA 94070

Group practices

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

• Sutter Bay Medical Foundation3,829 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in California →

Other family doctors in San Mateo

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

• Anna Petrova, MD
• Jason Cheung, DO
• Autumn Eglitis, MD
• Wendy M. Landreville, MD
• Johanna M. Wolgast, MD
• Daniel S. Han, DO
• Arpita Mukherjee, MD
• Priyanka Kallem, MD

All family doctors in San Mateo →

Other clinicians in Sutter Bay Medical Foundation

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

• Hema A. Shah, MD
• Mary K. Patz, MD
• Sara Razaqi, MD
• Keianne Yamada, MD
• Warrick Africa, NP
• Andrew D. Dao, 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