ICD-10-CM Code Library

2026 ICD-10-CM Codes

The Web's Free 2026 ICD-10-CM/PCS Medical Coding Reference. Browse the complete set of 2026 ICD-10-CM diagnosis codes organized by chapter and category. The 2026 ICD-10-CM/PCS code sets are now fully loaded. 2026 codes became effective on October 1, 2025.

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2026 ICD-10-CM Diagnosis Codes

Individual ICD-10 Code Pages

Detailed code pages with comprehensive guidelines, clinical information, and coding examples (103 codes)

CodeDescription
E11.65Type 2 Diabetes Mellitus with Hyperglycemia
E11.22Type 2 Diabetes Mellitus with Diabetic Chronic Kidney Disease
E11.40Type 2 Diabetes Mellitus with Diabetic Neuropathy, Unspecified
E10.9Type 1 Diabetes Mellitus Without Complications
E11.21Type 2 Diabetes Mellitus with Diabetic Nephropathy
E11.42Type 2 Diabetes Mellitus with Diabetic Polyneuropathy
E11.51Type 2 Diabetes Mellitus with Diabetic Peripheral Angiopathy Without Gangrene
I11.9Hypertensive Heart Disease Without Heart Failure
I12.9Hypertensive Chronic Kidney Disease with Stage 1 Through Stage 4 CKD, or Unspecified CKD
I13.0Hypertensive Heart and Chronic Kidney Disease with Heart Failure and Stage 1 Through Stage 4 CKD, or Unspecified CKD
I11.0Hypertensive Heart Disease with Heart Failure
I15.0Renovascular Hypertension
J44.0Chronic Obstructive Pulmonary Disease with Acute Lower Respiratory Infection
J45.909Unspecified Asthma, Uncomplicated
J18.9Pneumonia, Unspecified Organism
J20.9Acute Bronchitis, Unspecified
J44.9Chronic Obstructive Pulmonary Disease, Unspecified
J06.9Acute Upper Respiratory Infection, Unspecified
J45.40Moderate Persistent Asthma, Uncomplicated
J02.9Acute Pharyngitis, Unspecified
J03.90Acute Tonsillitis, Unspecified
J45.20Mild Intermittent Asthma, Uncomplicated
J43.9Emphysema, Unspecified
M25.511Pain in Right Shoulder
M25.512Pain in Left Shoulder
M79.1Myalgia
M19.90Unspecified Osteoarthritis, Unspecified Site
M54.2Cervicalgia
M17.11Unilateral Primary Osteoarthritis, Right Knee
M17.12Unilateral Primary Osteoarthritis, Left Knee
M62.81Muscle Weakness (Generalized)
M75.50Bursitis of Unspecified Shoulder
M25.561Pain in Right Knee
M25.562Pain in Left Knee
M54.89Other Dorsalgia
M79.3Panniculitis, Unspecified
M25.50Pain in Unspecified Joint
F41.9Anxiety Disorder, Unspecified
F32.9Major Depressive Disorder, Single Episode, Unspecified
F33.1Major Depressive Disorder, Recurrent, Moderate
F10.10Alcohol Abuse, Uncomplicated
F41.1Generalized Anxiety Disorder
F17.210Nicotine Dependence, Cigarettes, Uncomplicated
F43.10Post-traumatic Stress Disorder, Unspecified
F33.0Major Depressive Disorder, Recurrent, Mild
I25.10Atherosclerotic Heart Disease of Native Coronary Artery Without Angina Pectoris
I48.91Unspecified Atrial Fibrillation
I50.9Heart Failure, Unspecified
I25.5Ischemic Cardiomyopathy
I48.0Paroxysmal Atrial Fibrillation
I10Essential (Primary) Hypertension
I21.9Acute Myocardial Infarction, Unspecified
I20.9Angina Pectoris, Unspecified
I34.0Nonrheumatic Mitral (Valve) Insufficiency
I49.9Cardiac Arrhythmia, Unspecified
I73.9Peripheral Vascular Disease, Unspecified
I63.9Cerebral Infarction, Unspecified
K21.9Gastro-Esophageal Reflux Disease Without Esophagitis
K29.70Gastritis, Unspecified, Without Bleeding
K58.9Irritable Bowel Syndrome Without Diarrhea
K59.00Constipation, Unspecified
K80.20Calculus of Gallbladder Without Cholecystitis
K57.30Diverticulosis of Large Intestine Without Perforation or Abscess
K76.0Fatty (Change of) Liver, Not Elsewhere Classified
K92.2Gastrointestinal Hemorrhage, Unspecified
S06.0X0AConcussion Without Loss of Consciousness, Initial Encounter
S82.001AUnspecified Fracture of Right Patella, Initial Encounter
T14.90XAInjury, Unspecified, Initial Encounter
T50.905AAdverse Effect of Unspecified Drugs, Medicaments and Biological Substances, Initial Encounter
T81.4XXAInfection Following a Procedure, Initial Encounter
W19.XXXAUnspecified Fall, Initial Encounter
E03.9Hypothyroidism, Unspecified
E66.9Obesity, Unspecified
E78.5Hyperlipidemia, Unspecified
E87.6Hypokalemia
E88.81Metabolic Syndrome
N18.3Chronic Kidney Disease, Stage 3 (Moderate)
N39.0Urinary Tract Infection, Site Not Specified
N40.0Benign Prostatic Hyperplasia Without Lower Urinary Tract Symptoms
N95.1Menopausal and Female Climacteric States
N76.0Acute Vaginitis
O09.90Supervision of High Risk Pregnancy, Unspecified, Unspecified Trimester
O26.90Pregnancy Related Conditions, Unspecified, Unspecified Trimester
Z34.90Encounter for Supervision of Normal Pregnancy, Unspecified, Unspecified Trimester
R05.9Cough, Unspecified
R10.84Generalized Abdominal Pain
R50.9Fever, Unspecified
R51.9Headache, Unspecified
R53.83Other Fatigue
R55Syncope and Collapse
R06.02Shortness of Breath
Z23Encounter for Immunization
Z28.0Immunization Not Carried Out Because of Contraindication
Z28.1Immunization Not Carried Out Because of Patient Decision for Reasons of Belief or Group Pressure
Z28.20Immunization Not Carried Out Because of Patient Decision for Unspecified Reason
Z28.3Underimmunization Status
Z51.89Encounter for Other Specified Aftercare
Z79.4Long Term (Current) Use of Insulin
Z79.84Long Term (Current) Use of Oral Hypoglycemic Drugs
Z91.120Patient's Intentional Underdosing of Medication Regimen Due to Financial Hardship
E11.9Type 2 Diabetes Mellitus Without Complications
M54.5Low Back Pain
J44.1Chronic Obstructive Pulmonary Disease with Acute Exacerbation

What's Included in Each Code Page

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Clinical Information

Comprehensive clinical details, key characteristics, epidemiology, and medical background for each diagnosis code.

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Coding Guidelines

Step-by-step coding guidelines, ICD-10-CM official coding conventions, and when to use specific codes.

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Documentation Requirements

Detailed documentation requirements for medical record coding, physician documentation tips, and compliance notes.

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Related ICD-10 Codes

Associated diagnosis codes, combination codes, and alternative codes for similar or related conditions.

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Common Use Cases

Real-world clinical scenarios, typical patient presentations, and when to apply each diagnosis code.

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Coding Examples

Real-world coding examples from actual medical records showing proper code selection and application.

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