I15.9
BillableSecondary hypertension, unspecified
Secondary hypertension, unspecified
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •systemic connective tissue disordersM30-M36
- •transient cerebral ischemic attacks and related syndromesG45
- •hypertensive disease complicating pregnancy, childbirth and the puerperium,O10-O11, O13-O16
- •secondary hypertension involving vessels of brainI60-I69
- •secondary hypertension involving vessels of eyeH35.0
Use Additional Code
Additional codes that should follow this code
Code Also
A second code may be required; sequencing depends on circumstances
- underlying condition
Related Codes(4)
Related Conditions
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(36)
SNOMED CT
- Episodic hypertension23130000
- Paroxysmal hypertension23130000
- Secondary hypertension31992008
- Diastolic hypertension48146000
- Malignant hypertension70272006
- Secondary diastolic hypertension74451002
- Accelerated secondary hypertension89242004
- Malignant secondary hypertension89242004
- Pre-existing secondary hypertension complicating pregnancy, childbirth and puerperium199008003
- Hypertensive crisis706882009
- Hypertensive emergency132721000119104
- Perioperative hypertension434711000124103
UMLS
- Hypertension secondaryC0155616
- Secondary HypertensionC0155616
- Secondary hypertensionC0155616
- Secondary hypertension (disorder)C0155616
- Secondary hypertension NOSC0155616
- Secondary hypertension, unspecifiedC0155616
- Unspecified secondary hypertensionC0155616
- hypertension secondaryC0155616
- secondary hypertensionC0155616
Clinical Terms
- Accelerated secondary hypertension
- Hypertension secondary
- Malignant hypertension
- Diastolic hypertension
- Malignant secondary hypertension
- Perioperative hypertension
- Paroxysmal hypertension
- Secondary hypertension (disorder)
- Secondary diastolic hypertension
- Unspecified secondary hypertension
- Episodic hypertension
- Pre-existing secondary hypertension complicating pregnancy, childbirth and puerperium
- Hypertensive crisis
- Secondary hypertension NOS
- Hypertensive emergency
Frequently Asked Questions
What is the ICD-10 code for secondary hypertension, unspecified?
The ICD-10-CM code for secondary hypertension, unspecified is I15.9. The full clinical description is "Secondary hypertension, unspecified". I15.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code I15.9 mean?
ICD-10-CM code I15.9 represents “Secondary hypertension, unspecified”. It is classified under Chapter 9: Diseases of the Circulatory System and is a billable/specific code that can be used on a claim.
Is I15.9 a billable code?
Yes, I15.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is I15.9 in?
I15.9 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).
What codes cannot be used with I15.9?
I15.9 has Excludes1 notes indicating codes that cannot be used together with it, including: neonatal hypertension (P29.2); primary pulmonary hypertension (I27.0); postprocedural hypertension (I97.3).
Are additional codes required with I15.9?
Yes, when using I15.9, also report: ; exposure to environmental tobacco smoke (Z77.22); history of tobacco dependence (Z87.891); occupational exposure to environmental tobacco smoke (Z57.31); tobacco dependence (F17.-); tobacco use (Z72.0).
What SNOMED CT codes does I15.9 map to?
I15.9 maps to 10 SNOMED CT concepts: 89242004, 48146000, 23130000, 706882009, 132721000119104, and 5 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for I15.9?
I15.9 is linked to 1 UMLS Concept Unique Identifier: C0155616. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does I15.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like secondary hypertension, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of I15.9?
I15.9 maps to the ICD-11 code: BA04.Z (Secondary hypertension, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.