A Better Life Starts with Better Breathing

The Pulmonary & Sleep Institute in San Antonio specializes in the diagnosis and treatment of lung-related disorders. Our physicians are board-certified and licensed in Texas to help with all aspects of Pulmonary, Critical Care, and Sleep Medicine.

A Better Life Starts with Better Breathing

The Pulmonary & Sleep Institute in San Antonio specializes in the diagnosis and treatment of lung-related disorders. Our physicians are board-certified and licensed in Texas to help with all aspects of Pulmonary, Critical Care, and Sleep Medicine.

Patient Forms

Most Insurance Plans & Major Credit Cards are accepted! Pulmonary care that's convenient.

Consultation

Our consultations are thorough and complete. We offer relief from pulmonary & sleep disorders.

Management

We specialize in Critical Care for Inpatient Pulmonary and Respiratory Management.

OUR DOCTORS

EXPERIENCED TEAM

  • David-Marks-1

    David Marks

    David A. Marks

  • Employee-1

    Shannon Sanchez

    Shannon Sanchez

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PULMONARY & SLEEP DOCTOR

David A Marks, MD

The mission of Pulmonary & Sleep Institute is to help patients breath better. I am personally board-certified in internal medicine, pulmonary medicine, sleep medicine, and critical care medicine.

D. A. Marks, MD

WHAT PEOPLE SAY

OUR TESTIMONIALS

Dr. Carl G. Simpson

This is the best doctor in San Antonio, Myself, a retired doctor, couldn't find any physicians to workup and diagnose my lung problems. A colleague told me I should see Dr Marks. I'm so glad that I followed through.

Laura Sancho

I requested an appointment based on their skill and devotion for my recurrent respiratory infections. Dr Marks treated me and recognized a deficiency in my immune system that hadn’t been noticed before.

Roma

In my opinion based on several years getting treatment from Dr Marks and his P.A. Mrs. Sanchez you won't find anyone better. My lungs have an 80% improvement and they have gotten my RLS under control.

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