Medical Coding Reference – ICD’s

UPDATE:  2015 ICD-10-CM:  IDE-10-CM

The International Classification of Diseases (ICD) is the classification used to code and classify mortality data from death certificates. The International Classification of Diseases, Clinical Modification (ICD-9-CM) is used to code and classify morbidity data from the inpatient and outpatient records, physician offices, and most National Center for Health Statistics (NCHS) surveys.  Because the coding system is terribly complex, the right code for classifying mortality data is often skewed.

As a patient, it is important that you know what ICD is being used for your condition.  Can you imagine, your doctor puts you down under a F01-F99 code instead of under I01-I99!?

On October 1, 2014 the United States will transition from ICD-9-CM to ICD-10-CM.

2013 ICD-10-CM Codes

  • A00-B99 Certain infectious and parasitic diseases
  • C00-D49 Neoplasms
  • D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
  • E00-E89 Endocrine, nutritional and metabolic diseases
  • F01-F99 Mental, Behavioral and Neurodevelopmental disorders
  • G00-G99 Diseases of the nervous system
  • H00-H59 Diseases of the eye and adnexa
  • H60-H95 Diseases of the ear and mastoid process
  • I00-I99 Diseases of the circulatory system
  • J00-J99 Diseases of the respiratory system
  • K00-K95 Diseases of the digestive system
  • L00-L99 Diseases of the skin and subcutaneous tissue
  • M00-M99 Diseases of the musculoskeletal system and connective tissue
  • N00-N99 Diseases of the genitourinary system
  • O00-O9A Pregnancy, childbirth and the puerperium
  • P00-P96 Certain conditions originating in the perinatal period
  • Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities
  • R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
  • S00-T88 Injury, poisoning and certain other consequences of external causes
  • V00-Y99 External causes of morbidity
  • Z00-Z99 Factors influencing health status and contact with health services

Research tool for ICD-9-code in 2013 from the Centers for Medicare and Medicaid Services:  For example, the keyword is “toxic encephalopathy,” the resultant query is ICD-9-code 349.82.  Compare this with, a more useful tool for information on what is considered billable by insurance companies.  Additional information from the U.S. CDC:

Questions or comments? Email us at
Free 2013 ICD-9-CM Codes
Free 2013 ICD-10-CM & ICD-10-PCS Codes
Free 2006-2012 ICD-9-CM Codes
Free 2006-2013 HCPCS Codes

Source:  World Health Organization –

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From a Yellow Canary of the 21st century, living in our disabling biosphere

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