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AHA Coding Clinic® for ICD-9 - 1989 Third Quarter
Myocardial Infarction
Code Revisions Effective October 1, 1989
Effective October 1, 1989, the following fifth-digit sub-classification is for use with category 410, Acute myocardial infarction:
Note: For further definitions of myocardial infarction 5th digits, see Coding Clinic, Fourth Quarter, 1992.
0 episode of care unspecified
Use when the source document does not contain sufficient information for the assignment of fifth digit 1 or 2.
1 initial episode of care
Use to designate the acute phase of care regardless of the location of treatment. Includes cases that are transferred for care and treatment within the acute phase of care. Any subsequent episode...
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