Mission Sleep Disorders Institute is the only accredited Sleep disorders Center in South Orange County and has been accredited since 1996. The center is staffed by Registered Polysomnographic Technologists who are devoted to the field of sleep medicine. The institute offers 5 bedrooms with tempedic beds and cable TV and 1 exam room.

Dr. Tammelin, M.D. F.C.C.P. Diplomate American Board of Sleep Medicine has practiced Sleep Medicine since 1980. He is available for consultation for both inpatient and outpatients with sleep related complaints. He is fortunate to be associated with Board Certified Sleep specialists who are specialists in Clinical Psychology and Psychiatry.

The Institute evaluates and treats Adults, Adolescents and Children with sleep disorders including: Sleep Apnea, Insomnia, Periodic Limb Movements, Narcolepsy and a variety of other unusual sleep disorders. Tempur-Pedic beds in our lab provide a comfortable sleep away from home.

Our services include:

  • Sleep Consultations - Individual evaluation with a Board Certified Sleep Specialist.
  • Polysomnography (PSG) - An overnight sleep study in which sleep stages and breathing are monitored.
  • CPAP Titration Study (CPAP/BIPAP) - Treatment for Sleep Apnea.
  • MSLT Study - Daytime test that evaluates daytime sleepiness and is a rule-out for Narcolepsy.
  • MWT Study - Measure the ability of a person to stay awake.
  • Pulse Oximetry Screening - Overnight Monitoring of SaO2 and pulse which is done at home.
  • CPAP equipment needs can be taken care of through our Center.

Patient Resources:

Cross roads: Crown Valley Pkwy. and Medical Center Rd.

A personalized approach to your health

Phone Numbers Office (949) 364-1236
Mon - Fri: 8:30 a.m. - 5 p.m.


In-Person and Telehealth Visit Now Available

Reserve your first appointment and follow-up visits with your provider through online scheduling. Book for an in-person or telehealth visit to schedule routine office visit, ​annual wellness exam, physical or well woman exam, and well child check (ages 3 and up). With telehealth visit, meet with your provider face-to-face using a smart phone, tablet, or computer and receive the same great care from the convenience of your home.

No office visits. No long drives. Get the care you need from the safety of your home or office with a virtual visit. Schedule a visit today

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Our Providers

Our Provider

George Lazaar Schiffman, MD
George Lazaar Schiffman, MD
Critical Care Medicine, Pulmonology, Sleep Medicine
City:  Mission Viejo

Meet Bruce R. Tammelin, MD

Dr. Bruce Tammelin, MD is a pulmonologist and has been practicing for 40 years. He graduated from University Of Tennessee Health Science Center College Of Medicine in 1975 and specializes in pulmonary disease.