Jason L. Umphress, MD

Medicare activity in 2024

Official CMS public-use data for Jason L. Umphress, 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. Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)219 services
2. Biopsy of large bowel using a flexible endoscope (45380)138 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)105 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)84 services
5. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)77 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 pressure71%
• High cholesterol71%
• Arthritis43%
• Diabetes30%
• Anxiety23%
• Chronic kidney disease21%

Hospitals where Jason L. Umphress works

Medicare's Facility Affiliation Data lists Jason L. Umphress 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.

• Woodland Memorial HospitalWoodland, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050127

Practice locations

Addresses where Jason L. Umphress is enrolled with Medicare (CMS data updated October 2, 2026).

• 1321 Cottonwood StWoodland, CA 95695 (530) 668‑2600
• 632 W Gibson RdWoodland, CA 95695

Group practices

Medicare enrollment lists Jason L. Umphress as a member of this group (CMS data updated October 2, 2026).

• Dignity Health Medical Foundation1,184 clinicians in the group

Specialties

• Gastroenterologyprimary

Find other Gastroenterology doctors in California →

Other gastroenterologists in Woodland

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

• Lanchinh H. Nguyen, MD
• Rafiq Sheikh, MD
• Lorenzo Rossaro, MD

All gastroenterologists in Woodland →

Other clinicians in Dignity Health Medical Foundation

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

• Joseph Huang, OD
• Vicky Reyes Acosta
• Pankaj Timsina, MD
• Sundeep Adusumalli, MD
• Angela M. Mallory, PA
• Lorenc Malellari, 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