Alphabetic Index FY2027

I34.81

Nonrheumatic mitral (valve) annulus calcification

FY2027Chapter 9: Diseases of the circulatory system/I30–I5A Other forms of heart disease

BillableComplete code, valid to report
Care settingsHome Health Primary · MMTA - Cardiac and Circulatory

I34.81 (also written I3481) is a billable ICD-10-CM diagnosis code for nonrheumatic mitral (valve) annulus calcification. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 6 codes in category I34 (Nonrheumatic mitral valve disorders). The Alphabetic Index lists it under 4 entries. Its coding notes include a Code also instruction, 7 Excludes1 entries and 10 Excludes2 entries.

Code also

Two codes may be needed to describe the condition. This note gives no sequencing order.

This code
  • , if applicable:
    • nonrheumatic mitral (valve) insufficiency (I34.0)
    • nonrheumatic mitral (valve) stenosis (I34.2)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from I34 Nonrheumatic mitral valve disorders
  • mitral valve disease (I05.9)
  • mitral valve failure (I05.8)
  • mitral valve stenosis (I05.0)
  • mitral valve disorder of unspecified cause with diseases of aortic and/or tricuspid valve(s) (I08.-)
  • mitral valve disorder of unspecified cause with mitral stenosis or obstruction (I05.0)
  • mitral valve disorder specified as congenital (Q23.2, Q23.9)
  • mitral valve disorder specified as rheumatic (I05.-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (10 notes)
Inherited from Chapter 9 Diseases of the circulatory system
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Cardiac and Circulatory clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

Inclusion terms

Conditions classified to this code.

This code
  • Nonrheumatic mitral (valve) annular calcification
  • Mitral (valve) annulus calcification NOS

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 4 entries