Dr. Gruen graduated from Texas A&M Health Science Center College of Medicine in 1986 and has been in practice for 27 years. He completed a residency at Lac Usc Medical Center. He currently practices at LAC USC Medical Center and is affiliated with Children's Hospital Los Angeles and Keck Hospital of USC. Dr. Gruen accepts multiple insurance plans including Aetna, Medicare and Blue Cross of California. Dr. Gruen is board certified in Neurological Surgery. Dr. Gruen also practices at USC Keck Neurosurgery Spine Center in Los Angeles, CA. In addition to English, Dr. Gruen's practice supports these languages: Russian, German, Polish, Tagalog, Vietnamese, Arabic, Italian, Spanish, French and Korean.