ICD-10 Code for Hypertension

The default ICD-10-CM 2027 code for hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) is I10 – Essential (primary) hypertension. More specific codes depend on the details documented, as listed in the official index (78 codes, 60 billable).

Main code: I10 – Essential (primary) hypertension
Billable: Yes

Index entries for Hypertension

with
- heart failure (congestive) – I11.0
- heart involvement (conditions in I50.- or I51.4-I51.7, I51.89, I51.9, due to hypertension) – see Hypertension, heart
- kidney involvement – see Hypertension, kidney
benign, intracranial – G93.2
borderline – R03.0
cardiorenal (disease) – I13.10
- with heart failure – I13.0
  - with stage 1 through stage 4 chronic kidney disease – I13.0
  - with stage 5 or end stage renal disease – I13.2
- without heart failure – I13.10
  - with stage 1 through stage 4 chronic kidney disease – I13.10
  - with stage 5 or end stage renal disease – I13.11
cardiovascular
- disease (arteriosclerotic) (sclerotic) – see Hypertension, heart
- renal (disease) – see Hypertension, cardiorenal
chronic venous – see Hypertension, venous (chronic)
complicating
- childbirth (labor) – O16.4
  - pre-existing – O10.92
    - with
      - heart disease – O10.12
        with renal disease – O10.32
      - pre-eclampsia – O11.4
      - renal disease – O10.22
        with heart disease – O10.32
    - essential – O10.02
  - secondary – O10.42
- pregnancy – O16.- (header)
  - with edema – O14.9- (header) – see also Pre-eclampsia
  - gestational (pregnancy induced) (without proteinuria) – O13.- (header)
    - with proteinuria – O14.9- (header)
      - mild pre-eclampsia – O14.0- (header)
      - moderate pre-eclampsia – O14.0- (header)
      - severe pre-eclampsia – O14.1- (header)
        with hemolysis, elevated liver enzymes and low platelet count (HELLP) – O14.2- (header)
  - pre-existing – O10.91- (header)
    - with
      - heart disease – O10.11- (header)
        with renal disease – O10.31- (header)
      - pre-eclampsia
      - renal disease – O10.21- (header)
        with heart disease – O10.31- (header)
    - essential – O10.01- (header)
    - secondary – O10.41- (header)
  - transient – O13.- (header)
- puerperium, pre-existing – O16.5
  - pre-existing
    - with
      - heart disease – O10.13
        with renal disease – O10.33
      - pre-eclampsia – O11.5
      - renal disease – O10.23
        with heart disease – O10.33
    - essential – O10.03
  - pregnancy-induced – O13.9
  - secondary – O10.43
crisis – I16.9
due to
- endocrine disorders – I15.2
- pheochromocytoma – I15.2 – see also Pheochromocytoma, by type
- renal disorders NEC – I15.1
  - arterial – I15.0
- renovascular disorders – I15.0
- specified disease NEC – I15.8
emergency – I16.1
encephalopathy – I67.4
gestational (without significant proteinuria) (pregnancy-induced) (transient) – O13.- (header)
- with significant proteinuria – see Pre-eclampsia
- complicating
  - delivery – O13.4
  - puerperium – O13.5
Goldblatt's – I70.1
heart (disease) (conditions in I51.4-I51.9 due to hypertension) – I11.9
- with
  - heart failure (congestive) – I11.0
  - kidney disease (chronic) – see Hypertension, cardiorenal
intracranial, benign – G93.2
kidney – I12.9
- with
  - heart disease – see Hypertension, cardiorenal
  - stage 5 chronic kidney disease (CKD) or end stage renal disease (ESRD) – I12.0
  - stage 1 through stage 4 chronic kidney disease – I12.9
lesser circulation – I27.0
maternal – O16.- (header)
newborn – P29.2
- pulmonary (persistent) – P29.30
ocular – H40.05- (header)
pancreatic duct - code to underlying condition
- with chronic pancreatitis – K86.1
portal (due to chronic liver disease) (idiopathic) – K76.6
- gastropathy – K31.89
- in (due to) schistosomiasis (bilharziasis) – B65.9 – K77 [manifestation]
postoperative – I97.3
psychogenic – F45.8
pulmonary – I27.20
- with
  - cor pulmonale (chronic) – I27.29
    - acute – I26.09
  - right heart ventricular strain/failure – I27.29
    - acute – I26.09
  - right to left shunt related to congenital heart disease – I27.83
  - unclear multifactorial mechanisms – I27.29
- arterial (associated) (drug-induced) (toxin-induced) – I27.21
- chronic thromboembolic – I27.24
- due to
  - hematologic disorders – I27.29
  - kyphoscoliotic heart disease – I27.1
  - left heart disease – I27.22
  - lung diseases and hypoxia – I27.23
  - metabolic disorders – I27.29
  - specified systemic disorders NEC – I27.29
- group 1 (associated) (drug-induced) (toxin-induced) – I27.21
- group 2 – I27.22
- group 3 – I27.23
- group 4 – I27.24
- group 5 – I27.29
- of newborn (persistent) – P29.30
- primary (idiopathic) – I27.0
- secondary
  - arterial – I27.21
  - specified NEC – I27.29
renal – see Hypertension, kidney
renovascular – I15.0
resistant (apparent treatment) (treatment) (true) – I1A.0
secondary NEC – I15.9
- due to
  - endocrine disorders – I15.2
  - pheochromocytoma – I15.2 – see also Pheochromocytoma, by type
  - renal disorders NEC – I15.1
    - arterial – I15.0
  - renovascular disorders – I15.0
- specified NEC – I15.8
transient – R03.0
- of pregnancy – O13.- (header)
urgency – I16.0
venous (chronic)
- due to
  - deep vein thrombosis – see Syndrome, postthrombotic
- idiopathic – I87.309
  - with
    - inflammation – I87.32- (header)
      - with ulcer – I87.33- (header)
    - specified complication NEC – I87.39- (header)
    - ulcer – I87.31- (header)
      - with inflammation – I87.33- (header)
  - asymptomatic – I87.30- (header)

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.