This chapter includes certain conditions caused by a pathogenic organism or microorganism, such as a bacterium, virus, parasite, or fungus.

• Infection arising from device, implant or graft, not elsewhere classified

This chapter includes diseases of the blood as well as diseases of blood forming organs.

• Complications of pregnancy, childbirth and the puerperium
• Diseases of the immune system
• Certain conditions originating in the perinatal period
• Injury, poisoning or certain other consequences of external causes
• Human immunodeficiency virus disease
• Endocrine, nutritional or metabolic diseases
• Congenital malformations, deformations and chromosomal abnormalities
• Anaemia complicating pregnancy, childbirth or the puerperium
• Other diseases of the blood or blood-forming organs or certain disorders involving the immune mechanism complicating pregnancy, childbirth or the puerperium

• Complications of pregnancy, childbirth and the puerperium
• Neoplasms
• Developmental anomalies

This chapter includes endocrine diseases, nutritional diseases as well as metabolic diseases.

• Transitory endocrine or metabolic disorders specific to foetus or newborn
• Complications of pregnancy, childbirth and the puerperium

Mental, behavioural and neurodevelopmental disorders are syndromes characterized by clinically significant disturbance in an individual's cognition, emotional regulation, or behaviour that reflects a dysfunction in the psychological, biological, or developmental processes that underlie mental and behavioural functioning. These disturbances are usually associated with distress or impairment in personal, family, social, educational, occupational, or other important areas of functioning.

• Acute stress reaction
• Uncomplicated bereavement

This is a group of conditions characterized as being in or associated with the nervous system.

• Endocrine, nutritional or metabolic diseases
• Complications of pregnancy, childbirth and the puerperium
• Certain conditions originating in the perinatal period
• Injury, poisoning or certain other consequences of external causes

This refers to any diseases of the visual system, which includes the eyes and adnexa, the visual pathways and brain areas, which initiate and control visual perception and visually guided behaviour.

• Certain conditions originating in the perinatal period
• Certain infectious or parasitic diseases
• Complications of pregnancy, childbirth and the puerperium
• Endocrine, nutritional or metabolic diseases
• Injury, poisoning or certain other consequences of external causes
• Posterior cortical atrophy

This chapter contains diseases of the ear and diseases of the mastoid process.

• Complications of pregnancy, childbirth and the puerperium
• Certain infectious or parasitic diseases
• Certain conditions originating in the perinatal period
• Injury, poisoning or certain other consequences of external causes
• Neoplasms
• Endocrine, nutritional or metabolic diseases

This refers to diseases of the organ system that passes nutrients (such as amino acids, electrolytes and lymph), gases, hormones, blood cells, etc. to and from cells in the body to help fight diseases, stabilize body temperature and pH, and to maintain homeostasis.

• Certain infectious or parasitic diseases
• Certain conditions originating in the perinatal period
• Congenital malformations, deformations and chromosomal abnormalities
• Complications of pregnancy, childbirth and the puerperium
• Injury, poisoning or certain other consequences of external causes
• Endocrine, nutritional or metabolic diseases

• Endocrine, nutritional or metabolic diseases
• Congenital malformations, deformations and chromosomal abnormalities
• Injury, poisoning or certain other consequences of external causes
• Certain conditions originating in the perinatal period
• Certain infectious or parasitic diseases
• Complications of pregnancy, childbirth and the puerperium

• Endocrine, nutritional or metabolic diseases
• Injury, poisoning or certain other consequences of external causes
• Neoplasms
• Certain infectious or parasitic diseases
• Complications of pregnancy, childbirth and the puerperium
• Mental, behavioural or neurodevelopmental disorders

Diseases of the skin incorporate conditions affecting the epidermis, its appendages (hair, hair follicle, sebaceous glands, apocrine sweat gland apparatus, eccrine sweat gland apparatus and nails) and associated mucous membranes (conjunctival, oral and genital), the dermis, the cutaneous vasculature and the subcutaneous tissue (subcutis).

• Diseases of the epidermis
• Diseases of the dermis
• Diseases of the epidermal appendages (hair, hair follicle, sebaceous glands, apocrine sweat gland apparatus, eccrine sweat gland apparatus and nails)
• Diseases of subcutaneous tissue
• Diseases of cutaneous vasculature

This chapter contains diseases of musculoskeletal system and diseases of connective tissue.

• Injury, poisoning or certain other consequences of external causes
• Endocrine, nutritional or metabolic diseases
• Complications of pregnancy, childbirth and the puerperium
• Certain infectious or parasitic diseases
• Temporomandibular joint disorders
• Certain conditions originating in the perinatal period

Any disease characterized by pathological changes to the genitourinary system.

• Injury, poisoning or certain other consequences of external causes
• Endocrine, nutritional or metabolic diseases
• Complications of pregnancy, childbirth and the puerperium
• Certain infectious or parasitic diseases

A group of conditions characterized as occurring during the period of time from conception to delivery (pregnancy), during labor and delivery (childbirth) or during the approximately six weeks after delivery during which the uterus returns to the original size (puerperium).

• Postpartum necrosis of pituitary gland
• Obstetrical tetanus
• Injury, poisoning or certain other consequences of external causes

This chapter includes conditions that have their origin in the perinatal period even though death or morbidity occurs later.

• Endocrine, nutritional or metabolic diseases
• Congenital malformations, deformations and chromosomal abnormalities
• Neoplasms
• Injury, poisoning or certain other consequences of external causes
• Tetanus neonatorum
• Congenital gonococcal infection
• Human immunodeficiency virus disease
• Certain infectious or parasitic diseases
• Gastroenteritis or colitis of infectious origin
• Hereditary haemolytic anaemia
• Transient hypogammaglobulinaemia of infancy
• Certain congenital diseases of the nervous system
• congenital cardiomyopathy
• Paralytic ileus
• Pemphigus neonatorum
• Cradle cap

This chapter includes conditions caused by failure of a particular body site or body system to develop correctly during the antenatal period.

• Inborn errors of metabolism

!markdown Clinical findings include those found using physical, laboratory and imaging techniques. Diseases can manifest in many ways and in different body systems. Such specific manifestations may be a reason for treatment or encounter, with or without identifying or addressing the underlying condition. Categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, could be designated 'not otherwise specified', 'unknown aetiology' or 'transient'. The conditions and signs or symptoms included in this chapter consist of: - cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated - signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined; - provisional diagnoses in a patient who failed to return for further investigation or care; - cases referred elsewhere for investigation or treatment before the diagnosis was made; - cases in which a more precise diagnosis was not available for any other reason; - certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right. These categories should be used in conjunction with a code from another chapter that identifies the underlying condition.

• Certain conditions originating in the perinatal period

!markdown In the ICD, injury means physical or physiological bodily harm resulting from interaction of the body with energy (mechanical, thermal, electrical, chemical or radiant, or due to extreme pressure) in an amount, or at a rate of transfer, that exceeds physical or physiological tolerance. Injury can also result from lack of vital elements, such as oxygen. Poisoning by and toxic effects of substances are included, as is damage of or due to implanted devices. Maltreatment syndromes are included even if physical or physiological bodily harm has not been reported. Otherwise, psychological effects are not included (e.g. injured feelings). Injury usually has rapid onset in response to a well-defined event (e.g. a car crash, striking the ground after falling, drinking a strongly alkaline liquid, an overdose of a medication, a burn sustained during a surgical procedure). These events are often referred to as external causes of injury. The injurious energy can, however, originate from the injured person and/or from his or her immediate environment (e.g. a person running on a hot day sustains heat exhaustion), and injury can be caused by the injured person (i.e. intentional self-harm). Injury includes manifestations that are evident immediately after onset, which may persist or not, and manifestations that first become evident at a later date.

• Stress fracture, not elsewhere classified
• Pathological fracture, not elsewhere classified
• Certain specified obstetric trauma
• Malunion of fracture
• Birth injury
• Nonunion of fracture

!markdown The WHO definition of an ‘injury’ is: ‘Injuries are caused by acute exposure to physical agents such as mechanical energy, heat, electricity, chemicals, and ionizing radiation interacting with the body in amounts or at rates that exceed the threshold of human tolerance. In some cases, (for example, drowning and frostbite), injuries result from the sudden lack of essential agents such as oxygen or heat’. Injuries may be categorized in a number of ways. However, for most analytical purposes and for identifying intervention opportunities, it is especially useful to categorize injuries according to whether or not they were deliberately inflicted and by whom. Commonly used categories are: - unintentional (i.e. accidental) - intentional (i.e. deliberate): - interpersonal (e.g. assault and homicide) - self-harm (e.g. abuse of drugs and alcohol, self-mutilation, suicide) - legal intervention (e.g. action by police or other law enforcement personnel) - war, civil insurrection and disturbances (e.g. demonstrations and riots) - undetermined intent Regarding the collection of events that cause injuries, a set of definitions apply. See section ‘Definition related to transport accidents’.

!markdown Categories in this chapter are provided for occasions when circumstances other than a disease, injury or external cause classifiable elsewhere are recorded as "diagnoses" or "problems". This can arise in two main ways: 1. When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination or to discuss a problem which is in itself not a disease or injury. 2. When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury. Such circumstance or problem may be elicited during population surveys, when the person may or may not be currently sick, or be recorded as additional information to be borne in mind when the person is receiving care for some illness or injury.

!markdown **This supplementary chapter is a subclassification for optional use. This chapter is not intended for mortality reporting. Coding should always include also a category from the chapters 1-24 of ICD.** This supplementary chapter refers to disorders and patterns which originated in ancient Chinese Medicine and are commonly used in China, Japan, Korea, and elsewhere around the world. This list represents a union set of harmonized traditional medicine conditions of the Chinese, Japanese, and Korean classifications. For an extended list of traditional medicine conditions, please refer to the International Classification of Traditional Medicine (ICTM). **Definitions:** A disorder in traditional medicine, disorder (TM1)[1], refers to a set of dysfunctions in any of the body systems which presents with associated manifestations, i.e. a single or a group of specified signs, symptoms, or findings. Each disorder (TM1) may be defined by its symptomatology, etiology, course and outcome, or treatment response. 1. Symptomatology: signs, symptoms or unique findings by traditional medicine diagnostic methods, including inspection such as tongue examination, history taking (inquiry), listening and smelling examination, palpation such as pulse taking, abdominal examination, and other methods. 2. TM Etiology: the underlying traditional medicine explanatory style, such as environmental factors (historically known in TM translations as the external contractions), emotional factors (historically known in TM translations as the seven emotions), or other pathological factors, processes, and products. 3. Course and outcome: a unique path of development of the disorder (TM1) over time. 4 Treatment response: known response to traditional medicine interventions. In defining a disorder (TM1), symptomology and etiology are required. Course and outcome, and treatment response are optional. A pattern in traditional medicine, pattern (TM1), refers to the complete clinical presentation of the patient at a given moment in time including all findings. Findings may include symptomology or patient constitution, among other things. 1. Symptomatology (as above). 2. Constitution: the characteristics of an individual, including structural and functional characteristics, temperament, ability to adapt to environmental changes, or susceptibility to various health conditions. This is relatively stable, being in part genetically determined while partially acquired. [1]:'TM1' refers to Traditional Medicine conditions - Module I. The (TM1) designation is used throughout this chapter for every traditional medicine diagnostic category in order to be clearly distinguishable from conventional medicine concepts.

The section allows for creating functioning profiles and overall functioning scores of individuals, which are suitable to describe and quantify the level of functioning associated with a health conditions. To guide functioning assessment, the section includes two ICF-based instruments developed by WHO: the WHO Disability Assessment Schedule (WHODAS 2.0 36-item version), and the Model Disability Survey (MDS). The section is complemented by a generic set of functioning categories of high explanatory power derived from the ICF Annex 9.

These categories should never be used in primary coding. They are provided for use as supplementary or additional codes when it is desired to identify more detail in diseases classified elsewhere.