Timmen L. Cermak

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Timmen Cermak is an American psychiatrist known for his work on codependent personality types. [1] He is in private practice in San Francisco and Marin County with a focus on addictions. [2]


He proposed that codependency be listed as a personality disorder in the Diagnostic and Statistical Manual of Mental Disorders. [3] Cermak reasoned that when specific personality traits become excessive and maladaptive and caused significant impairment in functioning or caused significant distress, it warrants a personality disorder diagnosis. [4]



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  1. Harkness, D. (January–March 2001). "Testing Cermak's hypothesis: Is dissociation the mediating variable that links substance abuse in the family of origin with offspring codependency?". Journal of Psychoactive Drugs . 33 (1): 75–82. doi:10.1080/02791072.2001.10400471. PMID   11333004. S2CID   7462731.
  2. 1 2 3 Timmen L. Cermak, M.D. -- Hazelden
  3. Diagnostic and Statistical Manual of Mental Disorders (3rd, text rev. ed.). American Psychiatric Association. 1987.
  4. Cermak, Timmen L. (January–March 1986). "Diagnostic Criteria for Codependency". Journal of Psychoactive Drugs . 18 (1): 15–20. doi:10.1080/02791072.1986.10524475. PMID   3701499.