All ICD10 Codes

I99

Non-Billable
ChapterI00–I99
Rankcategory
Official Description

Other and unspecified disorders of circulatory system

Use a more specific code (2 billable)
I99.8Other disorder of circulatory systemI99.9Unspecified disorder of circulatory system
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 9: Diseases of the Circulatory System (I00-I99).

CH9 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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.-)

Clinical Hierarchy

BillableHas subcodes
CH9Diseases of the circulatory system (I00-I99)
I95-I99Other and unspecified disorders of the circulatory system (I95-I99)
I99Other and unspecified disorders of circulatory systemNot billable
I99.8Other disorder of circulatory systemBillable
I99.9Unspecified disorder of circulatory systemBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I99:

chapterCH9
Diseases of the circulatory system (I00-I99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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