Deepak V. Thiagarajan, MD

Medicare activity in 2024

Official CMS public-use data for Deepak V. Thiagarajan, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)1,026 services
2. Critical care, first 30-74 minutes (99291)343 services
3. Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)332 services
4. Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)140 services
5. Advance care planning, first 30 minutes (99497)92 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 cholesterol73%
• Diabetes55%
• Chronic kidney disease53%
• Heart failure53%
• Arthritis49%

Hospitals where Deepak V. Thiagarajan works

Medicare's Facility Affiliation Data lists Deepak V. Thiagarajan 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.

• San Antonio Regional HospitalUpland, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050099

Practice locations

Addresses where Deepak V. Thiagarajan is enrolled with Medicare (CMS data updated October 2, 2026).

• 255 E Bonita AvePomona, CA 91767 (909) 941‑0661
• 7974 Haven Ave, Suite 210Rancho Cucamonga, CA 91730 (909) 881‑5994

Group practices

Medicare enrollment lists Deepak V. Thiagarajan as a member of this group (CMS data updated October 2, 2026).

• United Hospitalist Inc17 clinicians in the group

Specialties

• Hospitalistprimary
• Internal Medicinealso

Find other Hospitalist doctors in California →

Other hospitalists in California

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

• Viridiana Garcia, MD
• Derek J. Orejel, MD
• Anthony T. Pham, MD
• Allison Bond, MD
• Daniela Arango Isaza, MD
• Jeffrey D. Mayne, MD
• Srilakshmi Moturu, MD
• Kendell R. Anderson, DO

All hospitalists in California →

Other clinicians in United Hospitalist Inc

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

• Ghassan E. Hadi, MD
• Carlos R. Vigil, DO
• Ali M. Etemadian, MD
• Zouhair Hakak, MD
• Adiofel Mark F. Mendoza, MD
• Syed M. Rizvi, 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