Here is a glimpse of the 2014 ICD-10-CM codes for STEMI and NSTEMI including some tips regarding the guidelines notes and changes.
Tip # 1 – AMI (Acute Myocardial Infarction) is classified by whether it is the initial MI or a subsequent one occurring within 4 weeks.
- Change – In ICD-9 a subsequent episode of care for MI is considered within 8 weeks.
In ICD-10 a subsequent episode of care for MI is considered within 4 weeks.
There are two basic types of MI – transmural and subendocardial.
Tip # 2 – ICD-10 further classifies by site, such as anterolateral wall or true posterior wall
Tip # 3 – MIs can also be classified as either STEMI or NSTEMI
Coding and Documentation Tips for AMI
- If an AMI is documented as nontransmural or subendocardial, but the site is provided, it is still coded as a subendocardial AMI.
- If NSTEMI evolves to STEMI, assign the STEMI code.
- If STEMI converts to NSTEMI due to thrombolytic therapy, it is still coded as STEMI
- AMI must be identified as initial or subsequent (occurring within the 4 week (28 day) acute phase of the initial MI
- STEMI of an unspecified site (I21.3) is the default code that is equivalent to the unspecified term AMI
ICD-10-CM – The Complete Official Draft Code Set; Ingenix
Advanced Anatomy and Physiology for ICD-10-CM/PCS; AMA
2014 Cardiology Top 50 Codes; AAPC
http://apps.who.int/classifications/icd10/browse/2010/en ; WHO website
http://www.aapc.com/ICD-10/codes/index.aspx ; AAPC ICD-10 Code Translator