liminfoICD-10 Code Lookup
Free web tool: ICD-10 Code Lookup
Filters by ICD-10 code, KCD-8 code, or disease name
| ICD-10 | KCD-8 | Disease Name | Category | Copy |
|---|---|---|---|---|
I10 | I10 | Essential (primary) hypertension | Circulatory | |
E11 | E11 | Type 2 diabetes mellitus | Endocrine | |
J45 | J45 | Asthma | Respiratory | |
M54 | M54 | Dorsalgia (Back pain) | Musculoskeletal | |
K21 | K21 | Gastro-oesophageal reflux disease (GERD) | Digestive | |
F32 | F32 | Major depressive episode | Mental | |
N18 | N18 | Chronic kidney disease (CKD) | Genitourinary | |
J06 | J06 | Acute upper respiratory infection (multiple/unspecified) | Respiratory | |
G43 | G43 | Migraine | Nervous | |
L20 | L20 | Atopic dermatitis | Skin | |
H10 | H10 | Conjunctivitis | Sense Organs | |
R51 | R51 | Headache | Symptoms | |
J20 | J20 | Acute bronchitis | Respiratory | |
E78 | E78 | Disorders of lipoprotein metabolism / Dyslipidemia | Endocrine | |
I25 | I25 | Chronic ischaemic heart disease | Circulatory | |
I21 | I21 | Acute myocardial infarction | Circulatory | |
E10 | E10 | Type 1 diabetes mellitus | Endocrine | |
J44 | J44 | Other chronic obstructive pulmonary disease (COPD) | Respiratory | |
I48 | I48 | Atrial fibrillation and flutter | Circulatory | |
I50 | I50 | Heart failure | Circulatory | |
I63 | I63 | Cerebral infarction | Circulatory | |
F41 | F41 | Other anxiety disorders | Mental | |
M10 | M10 | Gout | Musculoskeletal | |
K29 | K29 | Gastritis and duodenitis | Digestive | |
G20 | G20 | Parkinson disease | Nervous | |
G30 | G30 | Alzheimer disease | Nervous | |
C34 | C34 | Malignant neoplasm of bronchus and lung | Neoplasm | |
C50 | C50 | Malignant neoplasm of breast | Neoplasm | |
N39 | N39 | Other disorders of urinary system (incl. UTI) | Genitourinary | |
D50 | D50 | Iron deficiency anaemia | Blood | |
L40 | L40 | Psoriasis | Skin | |
M80 | M80 | Osteoporosis with pathological fracture | Musculoskeletal | |
H25 | H25 | Senile cataract | Sense Organs | |
H40 | H40 | Glaucoma | Sense Organs | |
O24 | O24 | Diabetes mellitus in pregnancy | Obstetric | |
Z00 | Z00 | General examination and investigation (health checkup) | Health Factors | |
K25 | K25 | Gastric ulcer | Digestive | |
E03 | E03 | Other hypothyroidism | Endocrine | |
E05 | E05 | Thyrotoxicosis (Hyperthyroidism) | Endocrine | |
B34 | B34 | Viral infection of unspecified site | Infection | |
U07.1 | U07.1 | COVID-19, virus identified | Infection | |
F33 | F33 | Recurrent depressive disorder | Mental | |
M51 | M51 | Other intervertebral disc disorders (lumbar disc) | Musculoskeletal | |
J18 | J18 | Pneumonia, unspecified organism | Respiratory | |
K80 | K80 | Cholelithiasis (Gallstones) | Digestive | |
N20 | N20 | Calculus of kidney and ureter | Genitourinary | |
I70 | I70 | Atherosclerosis | Circulatory | |
R10 | R10 | Abdominal and pelvic pain | Symptoms | |
R50 | R50 | Fever of other and unknown origin | Symptoms | |
J30 | J30 | Vasomotor and allergic rhinitis | Respiratory | |
K50 | K50 | Crohn disease | Digestive | |
K51 | K51 | Ulcerative colitis | Digestive |
ICD-10 Code Structure
Format: A00.0 — First letter (A-Z): Chapter, 2nd-3rd: Category (00-99), After decimal: Subcategory (0-9)
Example: I21.0 → I=Circulatory system (Ch IX), 21=Acute MI, .0=Anterior wall STEMI
KCD-8 (Korean Classification of Diseases) extends ICD-10 with Korean Medicine U-codes (U20-U79).
About ICD-10 Code Lookup
The ICD-10 Code Lookup is a comprehensive reference tool covering the WHO International Classification of Diseases, 10th Revision. It organizes all 22 chapters (A00-Z99 plus V01-Y98) into 11 searchable categories: Infection/Neoplasm, Endocrine/Blood, Mental/Nervous, Circulatory/Respiratory, Digestive/Genitourinary, Musculoskeletal/Skin, Sense Organs, Obstetric/Congenital, Injury/External, Symptoms/Other, and Code System. Each entry lists the code range, disease category description, and detailed examples with specific diagnosis codes.
For each disease chapter, the tool provides clinically relevant code examples. For instance, the Circulatory chapter (I00-I99) lists I10 for essential hypertension, I21 for acute myocardial infarction, I50 for heart failure, and I63 for cerebral infarction. The Mental/Nervous section covers F32 for depressive episodes, F41 for anxiety disorders, G20 for Parkinson disease, and G30 for Alzheimer disease. This level of specificity helps medical coders, clinicians, and health informaticists quickly locate the correct code range.
Beyond disease classifications, the tool includes a dedicated Code System category explaining ICD-10 code structure (letter + 2-digit category + decimal subcategory), differences between ICD-10-CM (Clinical Modification for diagnosis) and ICD-10-PCS (Procedure Coding System), ICD-11 major changes effective 2022, WHO ICD API endpoints, and KCD-8 (Korean Classification of Diseases) extensions including Korean traditional medicine U-codes.
Key Features
- Complete ICD-10 coverage: all 22 disease chapters from A00 (Cholera) through Z99 (Health service contacts) plus external cause codes V01-Y98
- 11 clinical categories for easy navigation: Infection/Neoplasm, Endocrine/Blood, Mental/Nervous, Circulatory/Respiratory, and 7 more
- Detailed diagnosis code examples per chapter: specific 3-character categories and 4-character subcategories with clinical descriptions
- Code System reference section explaining ICD-10 structure, ICD-10-CM vs ICD-10-PCS differences, and 7-character code formats
- ICD-11 update information: new chapters for Traditional Medicine (TM1) and Sexual Health (HA), gaming disorder (6C51), URI-based coding
- KCD-8 Korean extension details including Korean traditional medicine U-codes (U20-U33, U50-U79) and KOICD portal links
- WHO ICD API documentation with REST endpoints, authentication (Bearer token), and ICD-11 Coding Tool browser links
- Full-text search across code ranges, disease names, and clinical examples in both Korean and English
Frequently Asked Questions
What is ICD-10 and who maintains it?
ICD-10 (International Classification of Diseases, 10th Revision) is a medical coding system maintained by the World Health Organization (WHO). It provides a standardized system for classifying diseases, health conditions, injuries, and causes of death. The system uses alphanumeric codes from A00 through Z99, organized into 22 chapters. It is used globally for clinical documentation, health statistics, epidemiology, and insurance billing.
How is an ICD-10 code structured?
An ICD-10 code follows the format A00.0: the first letter indicates the chapter (A-Z), the 2nd and 3rd characters specify the category (00-99), and characters after the decimal point indicate subcategories (0-9). For example, I21.0 means: I = Circulatory system diseases (Chapter IX), 21 = Acute myocardial infarction, .0 = Anterior wall ST-elevation myocardial infarction. ICD-10-CM extends this to 7 characters for clinical specificity.
What is the difference between ICD-10-CM and ICD-10-PCS?
ICD-10-CM (Clinical Modification) is used for diagnosis coding with 3-7 character alphanumeric codes, applicable to both outpatient and inpatient settings. Example: E11.65 for Type 2 diabetes with hyperglycemia. ICD-10-PCS (Procedure Coding System) is used exclusively for inpatient procedure coding with 7 alphanumeric characters. Example: 0SRB0JZ for total hip replacement. CM codes describe what is wrong, PCS codes describe what was done.
What are the most commonly used ICD-10 codes?
Frequently used codes include: I10 (Essential hypertension), E11 (Type 2 diabetes mellitus), J06.9 (Acute upper respiratory infection, unspecified), M54.5 (Low back pain), K29.7 (Gastritis, unspecified), F32 (Depressive episode), I21 (Acute myocardial infarction), J45 (Asthma), and Z00 (General health examination). This tool lists these and hundreds more with their chapter context.
What changed in ICD-11 compared to ICD-10?
ICD-11, effective January 2022, introduced several major changes: fully digital-based design, URI-based code system, multi-axial coding with stem and extension codes, new chapters for Traditional Medicine (TM1) and Sexual Health (HA), inclusion of Gaming Disorder (6C51), and reclassification of gender incongruence outside mental disorders. The code format changed to 1A00-9E9Z using alphanumeric characters with a Foundation URI system.
What is KCD-8 and how does it relate to ICD-10?
KCD (Korean Classification of Diseases) is Korea's national extension of ICD-10, currently in its 8th revision (KCD-8, effective 2021). It maintains the full ICD-10 structure and adds Korean traditional medicine codes in the U-code range: U20-U33 for Korean Medicine syndromes and U50-U79 for Korean Medicine diseases. The Korean Statistics Information Service (koicd.kr) provides the official KCD-8 lookup.
How can I access the WHO ICD API programmatically?
The WHO provides a REST API for ICD coding at icd.who.int/icdapi. You can query entities using GET /icd/entity/{id} with Authorization: Bearer {token} and Accept: application/json headers. The ICD-11 Coding Tool is available as a browser-based tool at icd.who.int/ct11/icd11_mms/en/release, and ICD-10 can be browsed online at icd.who.int/browse10/2019/en.
What disease categories does this tool cover?
The tool covers all ICD-10 chapters organized into 11 categories: Infection/Neoplasm (A00-D48), Endocrine/Blood (D50-E90), Mental/Nervous (F00-G99), Circulatory/Respiratory (I00-J99), Digestive/Genitourinary (K00-N99), Musculoskeletal/Skin (L00-M99), Sense Organs (H00-H95), Obstetric/Congenital (O00-Q99), Injury/External (S00-Y98), Symptoms/Other (R00-Z99), and Code System information.