2022 ICD-10-CM Diagnosis Code I99.9

Unspecified disorder of circulatory system

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • I99.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM I99.9 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of I99.9 - other international versions of ICD-10 I99.9 may differ.
The following code(s) above I99.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to I99.9:
  • I00-I99
    2022 ICD-10-CM Range I00-I99

    Diseases of the circulatory system

    Type 2 Excludes
    • 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.-)
    Diseases of the circulatory system
Approximate Synonyms
  • Venous lake
ICD-10-CM I99.9 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 302 Atherosclerosis with mcc
  • 303 Atherosclerosis without mcc

Convert I99.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change

Diagnosis Index entries containing back-references to I99.9:

ICD-10-CM Codes Adjacent To I99.9
I97.81 Intraoperative cerebrovascular infarction
I97.810 …… during cardiac surgery
I97.811 …… during other surgery
I97.82 Postprocedural cerebrovascular infarction
I97.820 …… following cardiac surgery
I97.821 …… following other surgery
I97.88 Other intraoperative complications of the circulatory system, not elsewhere classified
I97.89 Other postprocedural complications and disorders of the circulatory system, not elsewhere classified
I99 Other and unspecified disorders of circulatory system
I99.8 Other disorder of circulatory system
I99.9 Unspecified disorder of circulatory system
J00 Acute nasopharyngitis [common cold]
J01 Acute sinusitis
J01.0 Acute maxillary sinusitis
J01.00 …… unspecified
J01.01 Acute recurrent maxillary sinusitis
J01.1 Acute frontal sinusitis
J01.10 …… unspecified
J01.11 Acute recurrent frontal sinusitis
J01.2 Acute ethmoidal sinusitis
J01.20 …… unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.