Structure of the ICD-11 Classification

MG30 Chronic pain

MG30.0 Chronic primary pain

MG30.01 Chronic widespread pain

Includes:
Fibromyalgia syndrome

8D8A.0 Complex regional pain syndrome

8D8A.00 CRPS Type I
8D8A.01 CRPS Type II

MG30.03 Chronic primary headache or orofacial pain

Includes:
Chronic primary temporomandibular disorder pains
Chronic primary temporomandibular joint arthralgia
Chronic primary myofascial temporomandibular disorder pain
Chronic primary orofacial pain

8A80.2 Chronic migraine

8A81.2 Chronic tension-type headache

8A82 Trigeminal autonomic cephalalgias (TACs)

DA0F.0 Burning mouth syndrome

MG30.00 Chronic primary visceral pain

Includes:
Chronic primary chest pain syndrome
Chronic primary epigastric pain syndrome
Chronic primary abdominal pain syndrome
Chronic primary bladder pain syndrome
Chronic primary pelvic pain syndrome

DD91.0 Irritable bowel syndrome

MG30.02 Chronic primary musculoskeletal pain

Includes:
Chronic primary low back pain
Chronic primary cervical pain
Chronic primary thoracic pain
Chronic primary limb pain

MG30.0Y Other specified chronic primary pain

MG30.0Z Chronic primary pain, unspecified       

MG30.1 Chronic cancer-related pain

MG30.10 Chronic cancer pain

Includes:
Chronic visceral cancer pain
[secondary parent: Chronic secondary visceral pain]
Chronic bone cancer pain
Chronic neuropathic cancer pain
[secondary parent: Chronic neuropathic pain]

MG30.11 Chronic post-cancer treatment pain

Includes:
Chronic post-cancer medicine pain
Chronic painful chemotherapy-induced polyneuropathy
[secondary parent: Chronic neuropathic pain]   
Chronic post-radiotherapy pain
Chronic painful radiation-induced neuropathy
[secondary parent: Chronic neuropathic pain]

MG30.1Y Other specified chronic cancer-related pain

MG30.1Z Chronic cancer-related pain, unspecified

MG30.2 Chronic postsurgical or post traumatic pain

MG30.21 Chronic postsurgical pain

Includes:
Chronic pain after amputation
[secondary parent: Chronic neuropathic pain]
Chronic pain after spinal surgery
Chronic pain after thoracotomy
Chronic pain after breast surgery
Chronic pain after herniotomy
Chronic pain after hysterectomy
Chronic pain after arthroplasty          

MG30.20 Chronic post traumatic pain

Includes:
Chronic pain after burns injury
Chronic pain after musculoskeletal injury
[secondary parent: Chronic musculoskeletal pain associated with structural changes]
Chronic whiplash injury associated pain

Coded elsewhere:
Chronic pain after spinal cord injury (MG30.50)
Chronic pain after brain injury (MG30.50)
Chronic pain after peripheral nerve injury (MG30.51)

MG30.2Y Other specified chronic postsurgical or post traumatic pain

MG30.2Z Chronic postsurgical or post traumatic pain, unspecified

MG30.5 Chronic neuropathic pain

MG30.51 Chronic peripheral neuropathic pain

Includes:
Chronic neuropathic pain after peripheral nerve injury
[secondary parent: chronic post traumatic pain]
Chronic painful polyneuropathy
Chronic painful radiculopathy   

8B82.0 Trigeminal neuralgia

1E91.5 Postherpetic neuralgia

MG30.50 Chronic central neuropathic pain

Includes:
Chronic central neuropathic pain associated with spinal cord injury
[secondary parent: chronic post traumatic pain]
Chronic central neuropathic pain associated with brain injury
[secondary parent: chronic post traumatic pain]
Chronic central post-stroke pain
Chronic central neuropathic pain associated with multiple sclerosis

MG30.5Y Other specified chronic neuropathic pain

MG30.5Z Chronic neuropathic, unspecified

MG30.6 Chronic secondary headache or orofacial pain

MG60.61 Chronic dental pain

Includes:
Chronic dental pain attributed to irreversible pulpitis
Chronic dental pain attributed to symptomatic apical periodontitis    

MG30.62 Chronic neuropathic orofacial pain

Includes:
Other cranial neuralgias

8B82.0 Trigeminal neuralgia

MG30.63 Headache or orofacial pain attributed to chronic secondary temporomandibular disorders

Includes:
Chronic secondary orofacial muscle pain
Chronic secondary temporomandibular joint pain

8A84.Y Other specified secondary headache

Includes:
Headache or orofacial pain attributed to trauma or injury to the head and/or neck
Headache or orofacial pain attributed to cranial or cervical vascular disorder
Headache or orofacial pain attributed to non-vascular intracranial disorder
Headache or orofacial pain attributed to a substance or its withdrawal
Headache or orofacial pain attributed to infection
Headache or orofacial pain attributed to disorders of homeostasis or their nonpharmacological treatment
Headache or orofacial pain attributed to disorders of the cranium, neck, eyes, ears, sinuses, salivary glands, oral mucosa

MG30.6Y Other specified chronic secondary headache or orofacial pain

MG30.6Z Chronic secondary headache or orofacial pain, unspecified       

MG30.4 Chronic secondary visceral pain

MG30.42 Chronic visceral pain from persistent inflammation

Includes:
Chronic visceral pain from persistent inflammation in the head / neck region
Chronic visceral pain from persistent inflammation in the thoracic region
Chronic visceral pain from persistent inflammation in the abdominal region
Chronic visceral pain from persistent inflammation in the pelvic region  

MG30.41 Chronic visceral pain from vascular mechanisms

Includes:
Chronic visceral pain from vascular mechanisms in the head / neck region
Chronic visceral pain from vascular mechanisms in the thoracic region
Chronic visceral pain from vascular mechanisms in the abdominal region
Chronic visceral pain from vascular mechanisms in the pelvic region  

MG30.40 Chronic visceral pain from mechanical factors

Includes:
Chronic visceral pain from mechanical factors in the head / neck region
Chronic visceral pain from mechanical factors in the thoracic region
Chronic visceral pain from mechanical factors in the abdominal region
Chronic visceral pain from mechanical factors in the pelvic region  

MG30.4Y Other specified chronic secondary visceral pain

MG30.4Z Chronic secondary visceral pain, unspecified

MG30.3 Chronic secondary musculoskeletal pain

MG30.30 Chronic musculoskeletal pain from persistent inflammation

Includes:
Chronic musculoskeletal pain from persistent inflammation due to infection
Chronic musculoskeletal pain from persistent inflammation due to crystal deposition
Chronic musculoskeletal pain from persistent inflammation due to autoimmune and auto-inflammatory disorder

MG30.31 Chronic musculoskeletal pain associated with structural changes

Includes:
Chronic musculoskeletal pain associated with osteoarthritis
Chronic musculoskeletal pain associated with spondylosis

Coded elsewhere: Chronic pain after musculoskeletal injury (MG30.20)

MG30.32 Chronic musculoskeletal pain associated with a disease of the nervous system

Includes:
Chronic musculoskeletal pain associated with Parkinon’s disease
Chronic musculoskeletal pain associated with multiple sclerosis
Chronic musculoskeletal pain associated with peripheral neurologic disease   

MG30.3Y Other specified chronic secondary visceral pain

MG30.3Z Chronic secondary visceral pain, unspecified