Non-specific code 2015 ICD-9-CM Diagnosis Code 401
Essential hypertension
  • 2015
  • Non-Billable Code

  • There are 3 ICD-9-CM codes below 401 that define this diagnosis in greater detail. Do not use this code on a reimbursement claim.
Clinical Information
  • Hypertension occurring without preexisting renal disease or known organic cause
401 Includes
  • high blood pressure
  • hyperpiesia
  • hyperpiesis
  • hypertension (arterial) (essential) (primary) (systemic)
  • hypertensive vascular:
    • degeneration
    • disease
401 Excludes
  • elevated blood pressure without diagnosis of hypertension (796.2)
  • pulmonary hypertension (416.0-416.9)
  • that involving vessels of:
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 401 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.