Specific code 2011 ICD-9-CM Diagnosis Code 995.20
Unspecified adverse effect of unspecified drug, medicinal and biological substance
  • Short description: Adv eff med/biol sub NOS.
  • ICD-9-CM 995.20 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 995.20 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2011 version of ICD-9-CM 995.20.
  • More recent version(s) of ICD-9-CM 995.20: 2012 2013 2014.
Disease Synonyms
  • Adverse drug reaction
  • Adverse effect of drug
  • Adverse reaction to drug
  • Central sleep apnea, due to drug or substance
  • Drug induced central apnea (disorder)
  • Drug intolerance
  • Lichenoid drug eruption
  • Lichenoid drug reaction
  • Medication side effects present
  • Side effect of medication
  • Sleep apnea, central, due to drug or substance
Applies To
  • Unspecified adverse effect of unspecified medicinal substance properly administered
Convert to ICD-10-CM: 995.20 converts approximately to:
  • 2014 ICD-10-CM T50.905A Adverse effect of unspecified drugs, medicaments and biological substances, initial encounter
ICD-9-CM Volume 2 Index entries containing back-references to 995.20:
  • Damage
    • medication 995.20
  • Drug - see also condition
    • adverse effect, correct substance properly administered 995.20
  • Effect, adverse NEC
    • biological, correct substance properly administered (see also Effect, adverse, drug) 995.20
    • drugs and medicinals 995.20
      • correct substance properly administered 995.20
      • overdose or wrong substance given or taken 977.9
        • specified drug - see Table of Drugs and Chemicals
    • medicinal substance, correct, properly administered (see also Effect, adverse, drugs) 995.20
  • Reaction
    • drug NEC (see also Table of Drugs and Chemicals) 995.20
      • allergic - see also Allergy, drug 995.27
      • correct substance properly administered 995.20
      • obstetric anesthetic or analgesic NEC 668.9
        • affecting fetus or newborn 763.5
        • specified drug - see Table of Drugs and Chemicals
      • overdose or poisoning 977.9
        • specified drug - see Table of Drugs and Chemicals
      • specific to newborn 779.4
      • transmitted via placenta or breast milk - see Absorption, drug, through placenta
      • withdrawal NEC 292.0
        • infant of dependent mother 779.5
      • wrong substance given or taken in error 977.9
        • specified drug - see Table of Drugs and Chemicals
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 995.20 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2011 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.