Steven M. Hassid, MD

Medicare activity in 2024

Official CMS public-use data for Steven M. Hassid, 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. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)336 services
2. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)146 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)47 services
4. Electrocardiogram (ecg) 2-day continuous with review by health care professional (93227)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 cholesterol65%
• Diabetes40%
• Ischemic heart disease29%
• Arthritis27%
• Chronic kidney disease24%

Hospitals where Steven M. Hassid works

Medicare's Facility Affiliation Data lists Steven M. Hassid 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
• San Mateo Medical CenterSan Mateo, CA · Acute Care Hospital · Emergency services: listed by Medicare · CCN 050113

Practice locations

Addresses where Steven M. Hassid is enrolled with Medicare (CMS data updated October 2, 2026).

• 222 W 39th AveSan Mateo, CA 94403 (650) 573‑2222

Group practices

Medicare enrollment lists Steven M. Hassid as a member of this group (CMS data updated October 2, 2026).

• County of San Mateo310 clinicians in the group

Specialties

• Internal Medicineprimary
• Cardiovascular Disease (Cardiology)also

Find other Internal Medicine doctors in California →

Other internal medicine doctors in San Mateo

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

• John L. Cunniff, MD
• Richard E. Ehling, MD
• Christie K. Moua, MD
• Gina L. Serraiocco, MD
• Sunye K. Vuong, MD
• Mundeep S. Chawla, MD
• Ulrike D. Sujansky, MD
• Melissa Nasiruddin, DO

All internal medicine doctors in San Mateo →

Other clinicians in County of San Mateo

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

• Fernando Gutierrez Bejar
• Joan Taylor, NP
• Madhavi Chenumalla, MD
• Richard E. Ehling, MD
• Jeffrey M. Do, MD
• Evelyn V. Haddad, 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