DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

I10 diagnosis code · Billable category · FY2027

I10 Essential (primary) hypertension

  • Billable
  • Not CC/MCC
  • POA reported

I10 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.

ICD-10 code by name

What is the ICD-10 code for hypertension?
Hypertension ICD-10 code: I10 Essential (primary) hypertension. Alphabetic Index: Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) → I10. Search ICD-10 for hypertension
What is the ICD-10 code for HTN (hypertension)?
HTN ICD-10 code: I10 Essential (primary) hypertension. Alphabetic Index: Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) → I10. HTN: hypertension, per MedlinePlus; the NCHS files do not use HTN. Search ICD-10 for HTN
What is the ICD-10 code for essential hypertension?
Essential hypertension ICD-10 code: I10 Essential (primary) hypertension. Search ICD-10 for essential hypertension
What is the ICD-10 code for accelerated hypertension?
Accelerated hypertension ICD-10 code: I10 Essential (primary) hypertension. Alphabetic Index: Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) → I10. Search ICD-10 for accelerated hypertension

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I10-I1A Hypertensive diseases (I10-I1A)
  3. I10 Essential (primary) hypertension
CC / MCC
Neither
MS-DRG
304-305
HCC V28
–
POA
Reported
Code Editor
Questionable adm.
Index entries
1

Instructions

At I10

Includes

  • high blood pressure
  • hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)

Excludes1

  • hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16) O10 O11 O13 O16

Excludes2

  • essential (primary) hypertension involving vessels of brain (I60-I69) I60 I69
  • essential (primary) hypertension involving vessels of eye (H35.0-) H35.0

Notes that also apply

Block I10-I1A instructions (Excludes1 2, Excludes2 1, Use additional code 6): printed on the block page.

Chapter 9 instructions (Excludes2 10): printed on the chapter 9 page.

Index entries

  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) → I10

NCHS Alphabetic Index. Index first, then the Tabular List.

Medicare grouping and edits

CMS files for I10
CC / MCCNeither
Appendix BMDC 05 Diseases and Disorders of the Circulatory System, MS-DRG 304-305 (Hypertension with MCC…)
Code EditorQuestionable admission when principal diagnosis
POAReported
HCC V28–

CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.

Hierarchy