Autoimmune diseases cause the body to produce antibodies that attack its own tissues, leading to deterioration, and in some cases destruction, of tissue.
Many autoimmune diseases that carry a higher risk to the patient’s health are defined in ICD-10 nomenclature, but codes are not narrowed down to one particular section.
Type 1 Diabetes
Age can be misleading with Type 1 diabetes. Don’t let a patient’s age determine your code selection since either type of diabetes can occur at almost any age. You should also remember that diabetes can come with multiple complications, and ICD-10 guidelines let you use as many codes within a particular category as you need to accurately indicate an individual’s health status.
When coding diabetes with manifestations, make sure you assign the appropriate additional digits needed to identify the type of complication.
|E10.1 – E10.11||Type 1 diabetes mellitus with ketoacidosis with or without coma|
|E10.2 – E10.29||Type 1 diabetes mellitus with kidney complications|
|E10.3 – E10.37||Type 1 diabetes mellitus with ophthalmic complications|
|E10.39||Type 1 diabetes mellitus with other diabetic ophthalmic complication|
|E10.5 – E10.59||Type 1 diabetes mellitus with circulatory complications|
|E10.6 – E10.69||Type 1 diabetes mellitus with other specified complication|
|E85.0 – E85.9||Amyloidosis|
If there is a causal relationship between hypertension and a heart condition, a code from I50.- or I51.4-I51.9 must be assigned to a code from category I11 (Hypertensive heart disease). If there is no causal relationship between hypertension and the heart condition, they must be coded separately. Sequence the codes according to the circumstances of the encounter.
Other Risk-Adjusted Autoimmune Conditions
|ICD-10 Code||Description||Coding Guidelines|
|D59.0*, D59.1, D68.61||Severe Hematological Disorders||*Use additional code for adverse effect, if applicable identify drug (T36-T50 with fifth or sixth character 5)|
|D89.82, D89.89*||Disorders of Immunity||*Excludes human immunodeficiency virus disease (B20)|
|G35, G36.0||Multiple Sclerosis|
|G37.3, G90.1||Spinal Cord Disorders & Injuries|
|G61.0, G61.81, G70.00, G70.01, G70.80, G70.81, G73.1*, G72.41||Myasthenia Gravis, Myoneural Disorders, and Guillain-Barre Syndrome, Inflammatory and Toxic Neuropathy||*Code first underlying neoplasm (C00-D49)|
|K50.00 – K50.919, K51.80 – K51.919||Inflammatory Bowel Disease||Use additional code to identify manifestations, such as pyoderma gangrenosum (L88)|
|K74.3||Cirrhosis of Liver||Code also, if applicable, viral hepatitis (acute)(chronic)(B15-B19)|