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WELCOME TO POSS HOUSTON.

At POSSHOUSTON, We help Houstonians breathe easier,
sleep deeper and lose weight faster.

More About Us

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BOOK AND APPOINTMENT

When do you want to come in?

Make an Appointment

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COVID TREATMENT

We provide special care in Covid Treatment

Medical services

Covid

We provide treatment for Coronavirus disease

Pulmonary

Lung Disease, Asthma, Chronic Bronchitis and more

Obesity

Obesity is the result of consuming more calories than the body

Verju

Its low-level lasers safely release fatty lipids that are found in fat cells beneath the skin.

Sleep

Do you find it difficult to fall or remain asleep ?

Weight Loss

Weight loss does not need to be difficult.

RAJESH RETHNAM, MD., FCCP.

Rajesh Rethnam graduated from medical school at the Government Medical College Kottayam in Kerala, India. He completed his residency at Drexel University College of Medicine – Hahnemann University Hospital in Philadelphia, PA. He then went on to complete his fellowships at Southern Illinois University School of Medicine in Springfield, Illinois and Memorial Sloan-Kettering Cancer Center in New York City, NY.

Board certified in Pulmonary medicine, Sleep medicine, Obesity medicine, Internal medicine, Critical care medicine and Neurocritical care medicine. His clinical interests include critical care, sleep apnea, insomnia, parasomnia, narcolepsy, circadian rhythm disorders, asthma, COPD, sarcoidosis, neuro-muscular diseases, pulmonary fibrosis and insulin resistance.

Rethnam has been in practice since 1997 and sees patients 17 years and older. He believes in taking as much time as needed to address each patient’s concerns and is dedicated to providing the best possible care to keep his patients healthy. He speaks English, Malayalam, Tamil and Hindi. Office staff speaks Spanish. Residents of the Memorial area, Rethnam and his wife have two children. Away from the clinic, he enjoys working on his marine aquarium and traveling.

RACHEL MATTERN, FNP-C

Rachel Mattern is a board certified nurse practitioner at this clinic. She graduated her bachelor of science degree in nursing at Texas woman’s University in Houston, Texas and began her nursing career in 2011. Rachel has worked at multiple magnet hospitals at Texas Medical Center throughout her nursing careers, such as Ben Taub General Hospital, Memorial Hermann Hospital, and MD Anderson cancer Center. She received her MS degree at her alma mater and transitioned into a family nurse practitioner and is board-certified since 2018. Rachel has been practicing in family, pulmonary, sleep and obesity medicine. She sees patients of all ages.

She strives to provide quality care to patients by incorporating critical thinking skills and family centered principles to improve patients’ healthcare outcome. Rachel is devoted to foster a culture of education, research, efficiency and diversity in her career. She speaks English, Mandarin, Cantonese, Malay, and conversational Spanish.

Rachel is married with 2 children, residing in Rosenberg, TX. At her leisure time, she enjoys music, pets, and traveling.