MS-DRG 916: ALLERGIC REACTIONS WITHOUT MCC

Principal diagnoses that group to MS-DRGs 915–916

From the CMS MS-DRG definitions manual’s principal-diagnosis index: 25 ICD-10-CM codes route here, and the CC/MCC status of the secondary diagnoses decides which of 915–916 the case lands in. The 24 most-searched:

• T78.40XAAllergy, unspecified, initial encounter
• T78.3XXAAngioneurotic edema, initial encounter
• T78.2XXAAnaphylactic shock, unspecified, initial encounter
• T78.00XAAnaphylactic reaction due to unspecified food, initial encounter
• T78.01XAAnaphylactic reaction due to peanuts, initial encounter
• T78.02XAAnaphylactic reaction due to shellfish (crustaceans), initial encounter
• T78.03XAAnaphylactic reaction due to other fish, initial encounter
• T78.04XAAnaphylactic reaction due to fruits and vegetables, initial encounter
• T78.05XAAnaphylactic reaction due to tree nuts and seeds, initial encounter
• T78.06XAAnaphylactic reaction due to food additives, initial encounter
• T78.070AAnaphylactic reaction due to milk and dairy products with tolerance to baked milk, initial encounter
• T78.071AAnaphylactic reaction due to milk and dairy products with reactivity to baked milk, initial encounter
• T78.079AAnaphylactic reaction due to milk and dairy products, unspecified, initial encounter
• T78.080AAnaphylactic reaction due to egg with tolerance to baked egg, initial encounter
• T78.081AAnaphylactic reaction due to egg with reactivity to baked egg, initial encounter
• T78.089AAnaphylactic reaction due to eggs, unspecified, initial encounter
• T78.09XAAnaphylactic reaction due to other food products, initial encounter
• T78.49XAOther allergy, initial encounter
• T80.51XAAnaphylactic reaction due to administration of blood and blood products, initial encounter
• T80.52XAAnaphylactic reaction due to vaccination, initial encounter
• T80.59XAAnaphylactic reaction due to other serum, initial encounter
• T80.61XAOther serum reaction due to administration of blood and blood products, initial encounter
• T80.62XAOther serum reaction due to vaccination, initial encounter
• T80.69XAOther serum reaction due to other serum, initial encounter

1 more codes group here. Open any code above for its full hierarchy, or check a whole claim in the free DRG calculator.

The severity splits

Same base DRG, split by whether a secondary diagnosis is a CC or MCC. The last column is the weight change from MS-DRG 916.