ICD-10 Diagnosis Codes Explained
Your referral, medical certificate or sick note shows a code instead of words — here is what each ICD-10 code means, where you may see it and what to do next.
Normal ranges for the values on your lab form are in Parameters. Which parameters each test includes is in Tests. What to test in your situation — ready-made lists in Check-ups. In-depth articles about symptoms and conditions are in Articles. Which article of the Russian Schedule of Diseases matches this code is in Schedule of Diseases. Current number of codes: 63.
Diseases of the musculoskeletal system (M00–M99)M17 — Gonarthrosis (Knee Osteoarthritis): ICD-10 Code ExplainedAugust 3, 2026
Diseases of the musculoskeletal system (M00–M99)M13 — Other Arthritis: What This ICD-10 Code Really MeansAugust 3, 2026
Diseases of the genitourinary system (N00–N99)N60 — Benign Mammary Dysplasia: What This ICD-10 Code MeansAugust 3, 2026
Factors influencing health status (Z00–Z99)Z01.8 — What This Code Means and Why It Is Not a DiseaseAugust 3, 2026
Diseases of the nervous system (G00–G99)G90.8 — Other Disorders of Autonomic Nervous System ExplainedAugust 3, 2026
Diseases of the circulatory system (I00–I99)I80 — Phlebitis and Thrombophlebitis: What the ICD-10 Code MeansAugust 3, 2026
Diseases of the circulatory system (I00–I99)I47 — Paroxysmal Tachycardia: What This ICD-10 Code MeansAugust 3, 2026
Diseases of the musculoskeletal system (M00–M99)M21.4 — Acquired Flat Foot (Pes Planus): ICD-10 Code ExplainedAugust 3, 2026
Diseases of the genitourinary system (N00–N99)N30 — Cystitis ICD-10 Code: Meaning, Symptoms, Urine TestsAugust 3, 2026
Factors influencing health status (Z00–Z99)Z34 — Supervision of Normal Pregnancy: What This Code MeansAugust 3, 2026
How to read diagnosis codesSick Note Codes in Russia: What the Numbers on the Certificate MeanAugust 3, 2026
Neoplasms and blood disorders (D00–D89)D50.9 — Iron Deficiency Anaemia, Unspecified: What the Code MeansAugust 3, 2026
Diseases of the circulatory system (I00–I99)I10 — What This ICD-10 Code for High Blood Pressure MeansAugust 3, 2026
Diseases of the respiratory system (J00–J99)J00 — Acute Nasopharyngitis (Common Cold): ICD-10 Code ExplainedAugust 3, 2026
Factors influencing health status (Z00–Z99)Z03 — Suspected Condition Ruled Out: What This ICD-10 Code MeansAugust 3, 2026
Injury, poisoning and external causes (S00–T98)T78.4 — Allergy, Unspecified: the ICD-10 Code ExplainedAugust 3, 2026
Diseases of the musculoskeletal system (M00–M99)M41 — Scoliosis: What the ICD-10 Code Means in Medical RecordsAugust 3, 2026
Diseases of the skin (L00–L99)L40 — What This ICD-10 Psoriasis Code Means on Your RecordsAugust 3, 2026
Mental and behavioural disorders (F00–F99)F32 — Depressive Episode: What This ICD-10 Code Really MeansAugust 3, 2026
Symptoms and abnormal findings (R00–R99)R51 — What the ICD-10 Headache Code Means on Your DocumentsAugust 3, 2026
Diseases of the respiratory system (J00–J99)J44 — What This ICD-10 Code Means and What a COPD Diagnosis IsAugust 3, 2026
Endocrine and metabolic diseases (E00–E90)E11 — Type 2 Diabetes Mellitus: What This ICD-10 Code MeansAugust 3, 2026
Factors influencing health status (Z00–Z99)Z10 — What This ICD-10 Code Means and Why It Is Not a DiseaseAugust 3, 2026
Symptoms and abnormal findings (R00–R99)R53 — Malaise and Fatigue: What This ICD-10 Code MeansAugust 3, 2026
Diseases of the skin (L00–L99)L20 — What the Atopic Dermatitis ICD-10 Code Means on Your ReferralAugust 3, 2026
Diseases of the respiratory system (J00–J99)J06.9 — Acute Upper Respiratory Infection Code ExplainedAugust 3, 2026
Diseases of the digestive system (K00–K93)K81 — Cholecystitis: What This ICD-10 Diagnosis Code MeansAugust 3, 2026
Diseases of the nervous system (G00–G99)G93.8 — Other Specified Disorders of Brain: What It MeansAugust 3, 2026
Endocrine and metabolic diseases (E00–E90)E03.9 — Hypothyroidism, Unspecified: What This Code MeansAugust 3, 2026
Diseases of the eye and ear (H00–H95)H52.1 — Myopia in ICD-10: What This Diagnosis Code MeansAugust 3, 2026
Mental and behavioural disorders (F00–F99)F34.0 — Cyclothymia in ICD-10: What This Diagnosis Code MeansAugust 3, 2026
Diseases of the circulatory system (I00–I99)I70 — What This ICD-10 Code for Atherosclerosis MeansAugust 3, 2026
Diseases of the nervous system (G00–G99)G40 — What the Epilepsy Code Means in ICD-10 and What to DoAugust 3, 2026
How to read diagnosis codesICD-10 Classes — the Full List of All 22 Chapters ExplainedAugust 3, 2026
Diseases of the genitourinary system (N00–N99)N40 — Hyperplasia of Prostate: What This ICD-10 Code MeansAugust 3, 2026
Diseases of the respiratory system (J00–J99)J03 — Acute Tonsillitis: ICD-10 Code for a Sore Throat ExplainedAugust 3, 2026
Diseases of the digestive system (K00–K93)K74 — Fibrosis and Cirrhosis of Liver: ICD-10 Code ExplainedAugust 3, 2026
Diseases of the respiratory system (J00–J99)J45 — Asthma ICD-10 Code Explained in Plain LanguageAugust 3, 2026
Diseases of the respiratory system (J00–J99)J18.9 — What This ICD-10 Code Means and Why Pneumonia Is UnspecifiedAugust 3, 2026
Endocrine and metabolic diseases (E00–E90)E66 — Obesity ICD-10 Code Explained in Plain LanguageAugust 3, 2026
Diseases of the nervous system (G00–G99)G43 — What the Migraine Code Means in ICD-10 and What to DoAugust 3, 2026
Diseases of the eye and ear (H00–H95)H25 — Senile Cataract in ICD-10: What the Diagnosis Code MeansAugust 3, 2026
Diseases of the musculoskeletal system (M00–M99)M42.1 — Adult Osteochondrosis of Spine: ICD-10 Code ExplainedAugust 3, 2026
Diseases of the digestive system (K00–K93)K52 — Noninfective Gastroenteritis and Colitis in ICD-10August 3, 2026
Factors influencing health status (Z00–Z99)Z01 — What This ICD-10 Code Means and Why It Is Not a DiseaseAugust 3, 2026
Malignant neoplasms (C00–C97)C50 — Malignant Neoplasm of Breast: ICD-10 Code ExplainedAugust 3, 2026
Diseases of the circulatory system (I00–I99)I48 — Atrial Fibrillation and Flutter: What This ICD-10 Code MeansAugust 3, 2026
Factors influencing health status (Z00–Z99)Z00.0 — General Medical Examination: What This ICD-10 Code MeansAugust 3, 2026
Factors influencing health status (Z00–Z99)Z02 — What This ICD-10 Code Means and Why It Is Not a DiseaseAugust 3, 2026
Diseases of the respiratory system (J00–J99)J20 — What Acute Bronchitis Means as an ICD-10 Diagnosis CodeAugust 3, 2026
Diseases of the circulatory system (I00–I99)I11.9 — Hypertensive Heart Disease Without Heart Failure ExplainedAugust 3, 2026
Diseases of the digestive system (K00–K93)K85 — Acute Pancreatitis: What the ICD-10 Code MeansAugust 3, 2026
Diseases of the eye and ear (H00–H95)H10 — Conjunctivitis in ICD-10: What the Diagnosis Code MeansAugust 3, 2026
Diseases of the digestive system (K00–K93)K29 — Gastritis and Duodenitis: ICD-10 Code Explained SimplyAugust 3, 2026
Diseases of the circulatory system (I00–I99)I21 — What the ICD-10 Code for Acute Myocardial Infarction MeansAugust 3, 2026
Infectious diseases (A00–B99)B18 — Chronic Viral Hepatitis ICD-10 Code Explained SimplyAugust 3, 2026
Diseases of the genitourinary system (N00–N99)N11 — Chronic Tubulo-Interstitial Nephritis: ICD-10 Code ExplainedAugust 3, 2026
Diseases of the circulatory system (I00–I99)I20 — What This ICD-10 Code for Angina Pectoris MeansAugust 3, 2026
Diseases of the circulatory system (I00–I99)I63 — Cerebral Infarction: What This ICD-10 Stroke Code MeansAugust 3, 2026
Diseases of the eye and ear (H00–H95)H66 — Suppurative and Unspecified Otitis Media ICD-10 Code MeaningAugust 3, 2026
Infectious diseases (A00–B99)B20 — What This ICD-10 Code Means and What to Do NextAugust 3, 2026
Neoplasms and blood disorders (D00–D89)D48 — Neoplasm of Uncertain Behaviour: What This ICD-10 Code MeansAugust 3, 2026
Diseases of the digestive system (K00–K93)K64 — Haemorrhoids in ICD-10 and Why the Old Code Was I84August 3, 2026