I41 diagnosis code · Billable category · FY2027

I41 Myocarditis in diseases classified elsewhere

I41 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.

Where it sits

Instructions

myocarditis (in):
Chagas' disease (chronic) (B57.2) B57.2
acute (B57.0) B57.0
coxsackie (virus) infection (B33.22) B33.22
diphtheritic (A36.81) A36.81
gonococcal (A54.83) A54.83
influenzal (J09.X9, J10.82, J11.82) J09.X9 J10.82 J11.82
meningococcal (A39.52) A39.52
mumps (B26.82) B26.82
rheumatoid arthritis (M05.31) M05.31
sarcoid (D86.85) D86.85
syphilis (A52.06) A52.06
toxoplasmosis (B58.81) B58.81
tuberculous (A18.84) A18.84

Chapter 9 instructions (Excludes2 10): printed on the chapter 9 page.

Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile)in (due to)epidemic louse-borne typhus → A75.0 [I41]
Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile)in (due to)typhus NEC → A75.9 [I41]

CMS files for I41
CC / MCC	MCC
PDX exclusion list	0818 (22 codes)
Appendix B	MDC 05 Diseases and Disorders of the Circulatory System, MS-DRG 314-316 (Other Circulatory System Diagnoses with MCC…); MDC 15 Newborns and Other Neonates with Conditions Originating in Perinatal Period, MS-DRG 791 (Prematurity with Major Problems…); MDC 15 Newborns and Other Neonates with Conditions Originating in Perinatal Period, MS-DRG 793 (Full Term Neonate with Major Problems…)
Code Editor	Manifestation code: not allowed as principal diagnosis
POA	Reported
HCC V28	–

MCC as a secondary diagnosis, not when the principal diagnosis is on its PDX exclusion list.