I09.1

Rheumatic diseases of endocardium, valve unspecified

Billable FY2026 2025-10-01 → 2026-09-30

This is the unspecified option. 4 more specific codes sit alongside it. Worth checking whether the documentation supports one of them.

Exclusions 11 never code together

Excludes1

Excludes2

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

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 2

Inclusion terms

Index entries leading here 2

Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
- rheumatic (active) (acute) (chronic) (subacute) I00
  - inactive or quiescent with
    - endocarditis I09.1
Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) I38
- with rheumatic fever (conditions in I00)
  - inactive or quiescent (with chorea) I09.1
- rheumatic (chronic) (inactive) (with chorea) I09.1

Alongside this code 4 same parent — I09

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

Present FY2024–FY2027.