2019 ICD-10-CM Diagnosis Code I16.9

Hypertensive crisis, unspecified

    2017 - New Code 2018 2019 Billable/Specific Code
  • I16.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM I16.9 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of I16.9 - other international versions of ICD-10 I16.9 may differ.
The following code(s) above I16.9 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 I16.9:
  • I00-I99
    2019 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
  • I10-I16
    2019 ICD-10-CM Range I10-I16

    Hypertensive diseases

    Type 1 Excludes
    • neonatal hypertension (P29.2)
    • primary pulmonary hypertension (I27.0)
    Type 2 Excludes
    • hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
    Use Additional
    • code to identify:
    • exposure to environmental tobacco smoke (Z77.22)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    Hypertensive diseases
  • I16
    ICD-10-CM Diagnosis Code I16

    Hypertensive crisis

      2017 - New Code 2018 2019 Non-Billable/Non-Specific Code
    Code Also
    • any identified hypertensive disease (I10-I15)
    Hypertensive crisis
ICD-10-CM I16.9 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 304 Hypertension with mcc
  • 305 Hypertension without mcc

Convert I16.9 to ICD-9-CM

Code History
  • 2017 (effective 10/1/2016): New code
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change

Diagnosis Index entries containing back-references to I16.9:
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) I10
    ICD-10-CM Diagnosis Code I10

    Essential (primary) hypertension

      2016 2017 2018 2019 Billable/Specific Code Questionable As Admission Dx
    Includes
    • high blood pressure
    • hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)
    Type 1 Excludes
    • hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
    Type 2 Excludes
    • essential (primary) hypertension involving vessels of brain (I60-I69)
    • essential (primary) hypertension involving vessels of eye (H35.0-)
    • crisis I16.9

ICD-10-CM Codes Adjacent To I16.9
I13.2 Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease
I15 Secondary hypertension
I15.0 Renovascular hypertension
I15.1 Hypertension secondary to other renal disorders
I15.2 Hypertension secondary to endocrine disorders
I15.8 Other secondary hypertension
I15.9 Secondary hypertension, unspecified
I16 Hypertensive crisis
I16.0 Hypertensive urgency
I16.1 Hypertensive emergency
I16.9 Hypertensive crisis, unspecified
I20 Angina pectoris
I20.0 Unstable angina
I20.1 Angina pectoris with documented spasm
I20.8 Other forms of angina pectoris
I20.9 Angina pectoris, unspecified
I21 Acute myocardial infarction
I21.0 ST elevation (STEMI) myocardial infarction of anterior wall
I21.01 ST elevation (STEMI) myocardial infarction involving left main coronary artery
I21.02 ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery
I21.09 ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall

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