Established in 1997, NW Houston Neurology is devoted to providing exceptional medical care to our patients. Our Board Certified physicians are respected in the community and highly regarded for their expertise in neurology and sleep medicine. Our friendly and attentive staff are dedicated to delivering a quality medical experience to our patients. Together, we provide each patient with an individualized plan of care affecting long-term health.

Our physicians are affiliated with Tomball Regional Medical Center, Houston Methodist Willowbrook Hospital, Kindred Hospital Tomball, and North Cypress Medical Center.

Balbir Singh, MD

Balbir Singh, MD
Board Certified in Neurology with added qualifications in Child Neurology and Neurophysiology

• Sri Guru Gobind Singh College, B.S., 1971
• Government Medical College, Patiala India, MBBS, 1976
• Residencies and Senior Residencies in Pediatrics, 1981 – 1985
• Residency in Pediatric Neurology, 1985-1988
• Epilepsy and EEG Fellowship, 1988-1989
• Board Certified, Psychiatry and Neurology with Special Qualification in Child Neurology, 1990
• Board Certified, Psychiatry and Neurology with Added Qualification in Clinical Neurophysiology, 1996
• Clinical Practice 1997 – Present

After completing his medical training in India, Dr. Singh moved to England for higher education. He was able to accomplish his goal of becoming a member of Royal College of Physicians (MRCP) in just over a year (rather than the usual three or more years). To fulfill his dream of specializing in neurology, he joined Neurology Residency Program in Southwestern Medical Center, Dallas. After completing residency training, he did a Fellowship in Epilepsy and Neurophysiology at the University of Minnesota, Minneapolis, MN. Before starting his practice in Northwest Houston, he held a faculty position in the department of Neurology at the Southwestern Medical School, Dallas. Although he did an outstanding job in that position and was awarded the Best Teacher Award, his heart was always in hands-on patient care, and in 1997 he moved to Spring, Texas and founded his private medical practice: Northwest Houston Neurology.  Over the 19 years practicing in the area, NWHN has grown considerably, eventually adding Adrian Santamaria, MD in 2008, and thus bringing comprehensive sleep medicine to the practice. In 2015, Preethi Durgam, DO, joined and enriched the practice with her passion for epilepsy research and care.

During his academic years, Dr. Singh’s research was published in national and international medical journals. He was also invited to present his research in many national and international medical meetings. He is board certified by the American Board of Neurology and Psychiatry. He is board certified in Neurology with special Qualification in Child Neurology.

Dr. Singh and his wife, pediatrician Dr. Poonam Singh, live in Magnolia and have two adult daughters, both of whom also have careers in medicine. In his spare time, he enjoys travel and gardening.

Adrian Santamaria, MD

Adrian Santamaria, MD
Board Certified in Neurology and Sleep Medicine

• University of Houston, B.S., 1997
• University of Texas Medical Branch Houston (UTMB), M.D., 2003 
• Residency, Neurology, UTMB Galveston, 2007 
• Sleep Medicine Fellowship, Cleveland Clinic Foundation, 2008 
• Board Certified, Psychology and Neurology, 2008
• Board Certified, Sleep Medicine, 2009 Clinical Practice 2008 – Present

Dr. Santamaria moved back to the Houston area in 2008 to join our private neurology practice. His vision of combining cutting edge sleep medicine with quality neurological care brought comprehensive sleep services to the area.

His pleasant demeanor, sociable nature, and unique insight make him an asset to the local medical community. He is well known for his outgoing personality and his natural ability to connect with patients on a personal level.

Dr. Santamaria is a current member of several medical organizations including American Academy of Neurology (AAN), American Neurological Association (ANA), Academy of Sleep Medicine (ASM), and the Texas Neurological Society (TNS). He currently serves as the medical director for the Tomball Regional Hospital Stroke Program and for the Methodist Willowbrook Hospital Sleep Lab. 

When Dr. Santamaria is not caring for patients, he enjoys spending all of his free time with his wife and three children.

Preethi Durgam, DO
Board Certified in Neurology

• Bachelor of Science, University of Texas at Austin, 2005
• Master’s in Public Health, University of North Texas, 2005 
• Doctor of Osteopathy, Lake Erie College of Osteopathic Medicine, 2010
• Internal Medicine Internship, UMCB at UTSW, Austin, TX, 2011
• Neurology Residency, Dept. of Neurology UTSW Austin, 2014
• Clinical Neurophysiology Fellowship, Epilepsy Dept, UT Houston, 2015
• Board Certified, Neurology and Epilepsy

Dr. Durgam is the newest physician to join NWHN in October 2015. She is a fellowship trained neurologist in Clinical Neurophysiology and Epilepsy and is very excited to provide medical care and educate patients in the Tomball and Cypress areas. Having lived in and trained in Texas all her life, she is very well connected with both neurology and medical communities in Houston, Austin, Dallas and San Antonio. Dr. Durgam completed her Clinical Neurophysiology/Epilepsy training at UT Houston in the Texas Medical Center.

She is well versed in the treatment of both new onset epilepsy cases as well as complex acquired and developmental epilepsy syndromes. She also evaluates patients at the Epilepsy Monitoring Unit at the North Cypress Medical Center. In addition, her strong foundation in and love of general neurology makes her an asset to our neurology practice.

Her compassionate and caring attitude helps her relate to her patients instantly. She strives to bring the best medical care to her patients and vigorously advocates for them. She is very personable and enthusiastic to communicate with her referring doctors regarding any aspect of patient care at any time.

Outside of work, Dr. Durgam likes to spend time with her husband and daughter, traveling, cooking and enjoying the outdoors.

Dr. Durgam is currently able to see patients on short notice, even next day appointments, at both our Tomball and North Cypress locations.

Office Address & Directions



New Patient Forms

A library of downloads, links and resources to expedite patient care and provide helpful information about neurology and sleep medicine.

  • Click here to complete medical forms on our secure Portal.

OR, download and complete the appropriate new patient packet below:

  • EMG New Patient Packet EMG New Patient Packet
  • Headache New Patient Packet Headache New Patient Packet
  • Seizure New Patient Packet Seizure New Patient Packet
  • Sleep New Patient Packet Sleep11 and Older NP Packet
  • Other Reason New Patient PacketOther Reason New Patient Packet
  • Release of Records Authorization