ICD-10 Code I10

Essential (primary) hypertension

Version 2019 Replaced Code Billable Code Questionable Admission Codes
ICD-10:I10
Short Description:Essential (primary) hypertension
Long Description:Essential (primary) hypertension

Valid for Submission

ICD-10 I10 is a billable code used to specify a medical diagnosis of essential (primary) hypertension. The code is valid for the year 2019 for the submission of HIPAA-covered transactions.

Deleted Code

This code was deleted in the 2019 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2018. This code was replaced for the FY 2019 (October 1, 2018 - September 30, 2019).

  • I16.0 - Hypertensive urgency
  • I16.1 - Hypertensive emergency
  • I16.9 - Hypertensive crisis, unspecified

Code Classification

  • Diseases of the circulatory system (I00–I99)
    • Hypertensive diseases (I10-I16)
      • Essential hypertension (I10) (primary)

Information for Medical Professionals

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:

  • Questionable admission codes - Some diagnoses are not usually sufficient justification for admission to an acute care hospital. For example, if a patient is given code R030 for elevated blood pressure reading, without diagnosis of hypertension, then the patient would have a questionable admission, since elevated blood pressure reading is not normally sufficient justification for admission to a hospital.

Diagnostic Related Groups

The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code I10 is grouped in the following groups for version MS-DRG V36.0 applicable from 10/01/2018 through 09/30/2019.

  • 304 - HYPERTENSION WITH MCC
  • 305 - HYPERTENSION WITHOUT MCC

Convert I10 to ICD-9

The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:

  • 401.0 - Malignant hypertension (Approximate Flag)
  • 401.1 - Benign hypertension (Approximate Flag)
  • 401.9 - Hypertension NOS (Approximate Flag)

Synonyms

The following clinical terms are approximate synonyms:

  • Benign essential hypertension
  • Benign essential hypertension complicating pregnancy, childbirth and the puerperium - delivered with postnatal complication
  • Benign hypertension
  • Brachydactyly and arterial hypertension syndrome
  • Brachydactyly syndrome type E
  • Chronic hypertension in obstetric context
  • Diastolic hypertension
  • Essential hypertension
  • Essential hypertension in obstetric context
  • Good hypertension control
  • Grange syndrome
  • Hereditary dysplasia of blood vessel
  • High-renin essential hypertension
  • Hypertension in the obstetric context
  • Hypertension monitoring offer default
  • Hypertension monitoring status
  • Hypertension with albuminuria
  • Hypertensive complication
  • Hypertensive disorder
  • Hypertensive emergency
  • Hypertensive episode
  • Hypertensive optic neuropathy
  • Hypertensive treatment changed
  • Intermittent hypertension
  • Labile diastolic hypertension
  • Labile essential hypertension
  • Labile systemic arterial hypertension
  • Low-renin essential hypertension
  • Malignant essential hypertension
  • Malignant hypertension
  • Rebound hypertension
  • Supine hypertension
  • Sustained diastolic hypertension
  • Systolic essential hypertension
  • Systolic hypertension
  • Transient hypertension

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code I10 are found in the index:


Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references for the code I10 are found in the tabular index:

  • Includes Notes:
    • high blood pressure
    • hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)
  • Type 1 Excludes Notes:
    • hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
  • Type 2 Excludes Notes:
    • essential (primary) hypertension involving vessels of brain (I60-I69)
    • essential (primary) hypertension involving vessels of eye (H35.0-)

Information for Patients


High Blood Pressure

Also called: Benign essential hypertension, Essential hypertension, HBP, HTN, Hypertension

Blood pressure is the force of your blood pushing against the walls of your arteries. Each time your heart beats, it pumps blood into the arteries. Your blood pressure is highest when your heart beats, pumping the blood. This is called systolic pressure. When your heart is at rest, between beats, your blood pressure falls. This is called diastolic pressure.

Your blood pressure reading uses these two numbers. Usually the systolic number comes before or above the diastolic number. A reading of

  • 119/79 or lower is normal blood pressure
  • 140/90 or higher is high blood pressure
  • Between 120 and 139 for the top number, or between 80 and 89 for the bottom number is called prehypertension. Prehypertension means you may end up with high blood pressure, unless you take steps to prevent it.

High blood pressure usually has no symptoms, but it can cause serious problems such as stroke, heart failure, heart attack and kidney failure.

You can control high blood pressure through healthy lifestyle habits such as exercise and the DASH diet and taking medicines, if needed.

NIH: National Heart, Lung, and Blood Institute

  • ACE inhibitors (Medical Encyclopedia)
  • Blood pressure measurement (Medical Encyclopedia)
  • Blood pressure monitors for home (Medical Encyclopedia)
  • Controlling your high blood pressure (Medical Encyclopedia)
  • Drug-induced hypertension (Medical Encyclopedia)
  • High blood pressure (Medical Encyclopedia)
  • High blood pressure - children (Medical Encyclopedia)
  • High blood pressure and eye disease (Medical Encyclopedia)
  • High blood pressure medications (Medical Encyclopedia)
  • Hypertensive heart disease (Medical Encyclopedia)
  • Low-salt diet (Medical Encyclopedia)
  • Malignant hypertension (Medical Encyclopedia)
  • Renovascular hypertension (Medical Encyclopedia)

[Read More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Index of Diseases and Injuries Definitions

  • And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
  • Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
  • Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • Type 1 Excludes Notes - A type 1 Excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • Inclusion terms - List of terms is included under some codes. These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
  • NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
  • See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
  • See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
  • 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
  • With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.