Index to Diseases entry: Hypertension, hypertensive(accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)
Each row is a subterm under the entry. Indented rows refine the row above; “see” sends you to another entry. Look the code up in the tabular list before reporting it: the tabular notes can require a more specific or an additional code.
| Documentation | Code | Code description or cross-reference |
|---|---|---|
| with | — | |
| heart failure(congestive) | I11.0 | Hypertensive heart disease with heart failure |
| 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 | Benign intracranial hypertension |
| borderline | R03.0 | Elevated blood-pressure reading, without diagnosis of hypertension |
| cardiorenal(disease) | I13.10 | Hypertensive heart and chronic kidney disease without heart failure, with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease |
| with heart failure | I13.0 | Hypertensive heart and chronic kidney disease with heart failure and stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease |
| without heart failure | I13.10 | Hypertensive heart and chronic kidney disease without heart failure, with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease |
| cardiovascular | — | |
| disease(arteriosclerotic) (sclerotic) | — | see Hypertension, heart |
| renal(disease) | — | see Hypertension, cardiorenal |
| chronic venous | — | see Hypertension, venous (chronic) |
| complicating | — | |
| childbirth(labor) | O16.4 | Unspecified maternal hypertension, complicating childbirth |
| pregnancy | O16.- | Unspecified maternal hypertension |
| puerperium, pre-existing | O16.5 | Unspecified maternal hypertension, complicating the puerperium |
| crisis | I16.9 | Hypertensive crisis, unspecified |
| due to | — | |
| endocrine disorders | I15.2 | Hypertension secondary to endocrine disorders |
| pheochromocytoma | I15.2 | Hypertension secondary to endocrine disorders |
| renal disorders NEC | I15.1 | Hypertension secondary to other renal disorders |
| renovascular disorders | I15.0 | Renovascular hypertension |
| specified disease NEC | I15.8 | Other secondary hypertension |
| emergency | I16.1 | Hypertensive emergency |
| encephalopathy | I67.4 | Hypertensive encephalopathy |
| gestational(without significant proteinuria) (pregnancy-induced) (transient) | O13.- | Gestational [pregnancy-induced] hypertension without significant proteinuria |
| with significant proteinuria | — | see Pre-eclampsia |
| complicating | — | |
| Goldblatt's | I70.1 | Atherosclerosis of renal artery |
| heart(disease) (conditions in I51.4-I51.9 due to hypertension) | I11.9 | Hypertensive heart disease without heart failure |
| with | — | |
| intracranial, benign | G93.2 | Benign intracranial hypertension |
| kidney | I12.9 | Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease |
| with | — | |
| lesser circulation | I27.0 | Primary pulmonary hypertension |
| maternal | O16.- | Unspecified maternal hypertension |
| newborn | P29.2 | Neonatal hypertension |
| pulmonary(persistent) | P29.30 | Pulmonary hypertension of newborn |
| ocular | H40.05- | Ocular hypertension |
| pancreatic duct - code to underlying condition | — | |
| with chronic pancreatitis | K86.1 | Other chronic pancreatitis |
| portal(due to chronic liver disease) (idiopathic) | K76.6 | Portal hypertension |
| gastropathy | K31.89 | Other diseases of stomach and duodenum |
| in(due to) schistosomiasis (bilharziasis) | B65.9 | Schistosomiasis, unspecified |
| postoperative | I97.3 | Postprocedural hypertension |
| psychogenic | F45.8 | Other somatoform disorders |
| pulmonary | I27.20 | Pulmonary hypertension, unspecified |
| with | — | |
| arterial(associated) (drug-induced) (toxin-induced) | I27.21 | Secondary pulmonary arterial hypertension |
| chronic thromboembolic | I27.24 | Chronic thromboembolic pulmonary hypertension |
| due to | — | |
| group 1(associated) (drug-induced) (toxin-induced) | I27.21 | Secondary pulmonary arterial hypertension |
| group 2 | I27.22 | Pulmonary hypertension due to left heart disease |
| group 3 | I27.23 | Pulmonary hypertension due to lung diseases and hypoxia |
| group 4 | I27.24 | Chronic thromboembolic pulmonary hypertension |
| group 5 | I27.29 | Other secondary pulmonary hypertension |
| of newborn(persistent) | P29.30 | Pulmonary hypertension of newborn |
| primary(idiopathic) | I27.0 | Primary pulmonary hypertension |
| secondary | — | |
| renal | — | see Hypertension, kidney |
| renovascular | I15.0 | Renovascular hypertension |
| resistant(apparent treatment) (treatment) (true) | I1A.0 | Resistant hypertension |
| secondary NEC | I15.9 | Secondary hypertension, unspecified |
| due to | — | |
| specified NEC | I15.8 | Other secondary hypertension |
| transient | R03.0 | Elevated blood-pressure reading, without diagnosis of hypertension |
| of pregnancy | O13.- | Gestational [pregnancy-induced] hypertension without significant proteinuria |
| urgency | I16.0 | Hypertensive urgency |
| venous(chronic) | — | |
| due to | — | |
| idiopathic | I87.309 | Chronic venous hypertension (idiopathic) without complications of unspecified lower extremity |
Tabular list notes for I10
- Includes
- high blood pressure
- hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)
- Excludes1 (never coded together)
- hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
- Excludes2 (not part of this condition, may be coded together)
- essential (primary) hypertension involving vessels of brain (I60-I69)
- essential (primary) hypertension involving vessels of eye (H35.0-)
How to read an Index to Diseases entry
- Words in parentheses after a term are nonessential modifiers: they may or may not appear in the record, and they do not change the code.
- Indented subterms are essential modifiers. Each one describes a different site, type or cause, and when the record supports it, the subterm's code replaces the default code.
- “With” and “in” link two conditions. The Official Guidelines presume a causal relationship between conditions linked by “with” in the index unless the provider documents that they are unrelated.
- “See” sends you to another entry that holds the code; “see also” points to another entry that may be useful.
- A code that ends in a dash, such as I50.-, is incomplete: the tabular list gives the characters it still needs.
- Never report a code from the index alone. Find it in the tabular list and apply its includes, excludes, code first, use additional code and 7th-character instructions before you report it.
Once the code is settled, check what it does for payment: the HCC lookup for risk adjustment, the CC/MCC exclusion check for inpatient severity, and the LCD code lookup for local coverage of the service it supports. The guide to ICD-10 diagnosis codes explains the code structure.
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Frequently asked questions
What is the ICD-10 code for hypertension?
I10 (Essential (primary) hypertension) is the code the index assigns to "Hypertension, hypertensive(accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)" with no further detail. Confirm it in the tabular list before reporting it, because the tabular notes can require a different or additional code.
What is excluded from I10?
An Excludes1 note at I10 lists hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16): those conditions are coded elsewhere and never together with I10.
Which documentation changes the code for hypertension?
The index lists 51 subterms with their own codes, including with heart failure(congestive) (I11.0); benign, intracranial (G93.2); borderline (R03.0); cardiorenal(disease) (I13.10); cardiorenal(disease) with heart failure (I13.0).
Sources
Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.
- ICD-10-CM FY2027 tabular order file (category titles)Version FY2027 · effective 2026-10-01 · file icd10cm_order_2027.txtSHA-256 38981fb2c1226e2b…
- ICD-10-CM FY2027 tabular list (chapter titles and ranges)Version FY2027 · effective 2026-10-01 · file 2027-code-tables-tabular-index.zipSHA-256 37baa476323714be…
- ICD-10-CM FY2027 code descriptions addenda (codes added, deleted and revised)Version FY2027 · effective 2026-10-01 · file icd10cm_codes_addenda_2027.txtSHA-256 cfba025073235af4…
Disclaimer
The entry, subterms and codes are reproduced from the FY2027 ICD-10-CM index; code descriptions are from the FY2027 code files. Code from the medical record using both the index and the tabular list, under the ICD-10-CM Official Guidelines. Not legal, clinical or billing advice.
Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.