Carl A. Zehner, MD

Medicare activity in 2024

Official CMS public-use data for Carl A. Zehner, 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)597 services
2. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)595 services
3. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)51 services
4. Ultrasound of heart, follow-up (93308)46 services
5. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)41 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%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)52%
• Arthritis50%
• Ischemic heart disease42%
• Diabetes38%

Hospitals where Carl A. Zehner works

Medicare's Facility Affiliation Data lists Carl A. Zehner 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.

• Memorial Hermann - Texas Medical CenterHouston, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · CCN 450068

Practice locations

Addresses where Carl A. Zehner is enrolled with Medicare (CMS data updated October 2, 2026).

• 1515 Holcombe BlvdHouston, TX 77030 (713) 792‑2121

Group practices

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

• Physicians Referral Service2,765 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary

Find other Cardiovascular Disease (Cardiology) doctors in Texas →

Other cardiologists in Houston

Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.

• Rupin A. Kadakia, MD
• Zvonimir Krajcer, MD
• Alexander Postalian, MD
• Usman Mustafa, MD
• Heather Pemberton, MD
• Charles Bulathsinghala, MD
• Maria M. Patarroyo Aponte, MD
• Mohammed S. Khan, MD

All cardiologists in Houston →

Other clinicians in Physicians Referral Service

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

• Victor E. Mulanovich, MD
• Ashley L. Martinez, NP
• Ayush P. Gandhi, MD
• Michael J. Glover, MD
• Lior Lutfak, PA
• Stephen Lee, 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