Medical Billing and Coding

A deep dive into ICD-11’s upgraded features, chapters and benefits:

Ever since the introduction of ICD-1 in 1909, the ICD system has been constantly progressing in developing the ICD codes, making advancements, creating milestones, overcoming setbacks and building opportunities in medical coding system. WHO does immense work in developing ICD codes and updates them annually.

Having come so far, International Classification of Diseases (ICD), the globally recognised system, constantly works on categorising and coding diseases, identifying new conditions and injuries. The latest code advancement is ICD-11 is a modernised version of ICD-10 with over 55,000 codes. ICD has been in use since 1994 and implemented in US from 2015. ICD-11 its successor is even more advanced by

Upgraded features:

ICD 11 has adaptations from ICD 10 and new codes are also introduced in it. Let us have a look into some of the new developments in ICD 11.

  • Prioritising the patient’s safety, a complete revamp of patient’s safety standards has been processed in ICD 11 in accordance with WHO patient safety standards.
  • A new list of mental disorders Avoidant/restrictive food intake disorder (6B83), Body integrity dysphoria (6C21), Catatonia (486722075), Complex post-traumatic stress disorder (6B41), Gaming disorder (6C51), Olfactory reference disorder (6B22), and Prolonged grief disorder (6B42).
  • Specific coding for HIV malaria or tuberculosis is added.
  • Cancer registration procedure is included in ICD 11.
  • Coding for complications in diabetes is included in ICD 11.
  • Acute stress reaction is included in a chapter called “Factors including health status or contact with health services”. It is no longer considered a mental disorder.
  • Hyperkinetic disorder is renamed as “attention deficit hyperactivity disorder”.
  • Gaming disorder is newly added to ICD 11 under the group “Disorders due to addictive behaviours”.
  • A new chapter is dedicated for conditions related to sexual health and is added to ICD 11.
  • New updates are brought to gender incongruence like transgenderism and gender dysphoria in ICD 11.
  • Coding for antimicrobial resistance has been expanded.
  • Personality disorder section has been completely restructured. All types of personality disorders are merged into one category. An additional category for personality difficulty is added.
  • Stroke is classified as a neurological disorder, earlier it was a disease of circulatory system.
  • Allergies are coded under “diseases of immune system”.

Chapters of ICD-11:

Classification of ICD 11 chapters are listed below for clinical code reference.

1A00–1H0Z Certain infectious or parasitic diseases
2A00–2F9Z Neoplasms
3A00–3C0Z Diseases of the blood or blood-forming organs
4A00–4B4Z Diseases of the immune system
5A00–5D46 Endocrine, nutritional or metabolic diseases
6A00–6E8Z Mental, behavioural or neurodevelopmental disorders
7A00–7B2Z Sleep-wake disorders
8A00–8E7Z Diseases of the nervous system
9A00–9E1Z Diseases of the visual system
AA00–AC0Z Diseases of the ear or mastoid process
BA00–BE2Z Diseases of the circulatory system
CA00–CB7Z Diseases of the respiratory system
DA00–DE2Z Diseases of the digestive system
EA00–EM0Z Diseases of the skin
FA00–FC0Z Diseases of the musculoskeletal system or connective tissue
GA00–GC8Z Diseases of the genitourinary system
HA00–HA8Z Conditions related to sexual health
JA00–JB6Z Pregnancy, childbirth or the puerperium
KA00–KD5Z Certain conditions originating in the perinatal period
LA00–LD9Z Developmental anomalies
MA00–MH2Y Symptoms, signs or clinical findings, not elsewhere classified
NA00–NF2Z Injury, poisoning or certain other consequences of external causes
PA00–PL2Z External causes of morbidity or mortality
QA00–QF4Z Factors influencing health status or contact with health services
RA00–RA26 Codes for special purposes
SA00–SJ3Z Supplementary Chapter Traditional Medicine Conditions – Module I
VA00–VC50 Supplementary section for functioning assessment
XA0060–XY9U Extension Codes


Benefits of ICD 11:

  • Creating a need for more ambulatory care services.
  • In-depth clinical detail.
  • Captures risk involved in a disease.
  • Detailed framework for disease classification, disorders and injuries.
  • ICD-11 also includes new features such as improved functionality for Electronic Health Records (EHRs) and enhanced interoperability.
  • ICD 11 has included a set of rare diseases.
  • Extension of codes help in addition of relevant clinical documentation.
  • ICD 11 codes are more straightforward and undemanding compared to ICD 10.
  • The technological infrastructure of ICD 11 is structured in such a way that integration with local digital records is seamless.


Thus ICD 11 has developed a comprehensive set of codes by including all new age diseases, disorders and the integration of ICD 11 into the local clinical systems is at ease. This makes ICD 11 a successful, well-aligned, statistically classified framework of clinical codes so far.

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