Maria Sandra A. Umali, MD

Medicare activity in 2024

Official CMS public-use data for Maria Sandra A. Umali, 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)743 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)248 services
3. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)71 services
4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)46 services
5. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)42 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%
• Arthritis57%
• Osteoporosis25%
• Diabetes24%
• Chronic kidney disease21%

Hospitals where Maria Sandra A. Umali works

Medicare's Facility Affiliation Data lists Maria Sandra A. Umali 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.

• Henry Mayo Newhall HospitalValencia, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 050624

Practice locations

Addresses where Maria Sandra A. Umali is enrolled with Medicare (CMS data updated October 2, 2026).

• 22621 Lyons AveNewhall, CA 91321 (661) 964‑0597
• PO Box, Suite 221360Newhall, CA 91322

Specialties

• Gastroenterologyprimary
• Cardiovascular Disease (Cardiology)also

Find other Gastroenterology doctors in California →

Other gastroenterologists in California

Clinicians with the same Medicare primary specialty in California — not a recommendation.

• Kumar S. Desai, MD
• Babak Firoozi, MD
• Raphael B. Merriman, MD
• Rukmini Enjamuri, MD
• Stephen Kim, MD
• Han Zhang, MD
• Tanya Dam, DO
• Courtney A. Gonzales, MD

All gastroenterologists in California →

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