Cesar A. Santiago, MD

Medicare activity in 2024

Official CMS public-use data for Cesar A. Santiago, 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. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)42 services
2. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)29 services
3. Injection of agent into vein to assess blood flow of skin graft or flap (15860)16 services
4. Removal of multiple hemorrhoid groups (46260)11 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 cholesterol75%
• High blood pressure74%
• Arthritis42%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)35%
• Depression30%
• Anxiety29%

Hospitals where Cesar A. Santiago works

Medicare's Facility Affiliation Data lists Cesar A. Santiago 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.

• CHRISTUS Santa Rosa Hospital-San MarcosSan Marcos, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450272

Practice locations

Addresses where Cesar A. Santiago is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

• 105 Medical, Suite 200Seguin, TX 78155 (830) 643‑7900
• 1340 Wonder World Dr, 4301 Lohp Specialty Care San MarcosSan Marcos, TX 78666 (512) 353‑6400
• 600 N Union AveNew Braunfels, TX 78130 (830) 643‑5166
• 620 S Fleishel Ave, CHRISTUS Trinity ClinicTyler, TX 75701 (903) 606‑4900
• 630 S Fleishel AveTyler, TX 75701 (903) 606‑5560

Group practices

Medicare enrollment lists Cesar A. Santiago as a member of this group (CMS data updated October 2, 2026).

• CHRISTUS Trinity Clinic Texas1,540 clinicians in the group

Specialties

• Colorectal Surgery (Proctology)primary

Find other Colorectal Surgery (Proctology) doctors in Texas →

Other colorectal surgeons in Texas

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

• Aakash H. Gajjar, MD
• Sharon G. Gregorcyk, MD
• Clark M. Kardys, MD
• J M. Downs, MD
• Jeffrey L. Van Eps, MD
• Yi-Qian Nancy You, MD
• Joshua C. Coursey, MD
• Tamara J. Merchant-Mccambry, MD

All colorectal surgeons in Texas →

Other clinicians in CHRISTUS Trinity Clinic Texas

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

• Adrianna Slaughter, NP
• Matthew T. Proctor, MD
• William W. Miller, MD
• Patrick M. Weill, MD
• Christopher Payne, MD
• Madison T. Crow, NP

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