Free Tool
ICD-10-CM Code Lookup
Search 70,000+ ICD-10-CM diagnosis codes instantly. Type a keyword (e.g. diabetes) or a code (e.g. E11) to get started.
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| Code | Description | Billable | Category |
|---|---|---|---|
| G932 | Benign intracranial hypertension | ✔ Yes | Nervous System |
| H40051 | Ocular hypertension, right eye | ✔ Yes | Eye & Adnexa |
| H40052 | Ocular hypertension, left eye | ✔ Yes | Eye & Adnexa |
| H40053 | Ocular hypertension, bilateral | ✔ Yes | Eye & Adnexa |
| H40059 | Ocular hypertension, unspecified eye | ✔ Yes | Eye & Adnexa |
| I10 | Essential (primary) hypertension | ✔ Yes | Circulatory System |
| I150 | Renovascular hypertension | ✔ Yes | Circulatory System |
| I151 | Hypertension secondary to other renal disorders | ✔ Yes | Circulatory System |
| I152 | Hypertension secondary to endocrine disorders | ✔ Yes | Circulatory System |
| I158 | Other secondary hypertension | ✔ Yes | Circulatory System |
| I159 | Secondary hypertension, unspecified | ✔ Yes | Circulatory System |
| I1A0 | Resistant hypertension | ✔ Yes | Circulatory System |
| I270 | Primary pulmonary hypertension | ✔ Yes | Circulatory System |
| I2720 | Pulmonary hypertension, unspecified | ✔ Yes | Circulatory System |
| I2721 | Secondary pulmonary arterial hypertension | ✔ Yes | Circulatory System |
| I2722 | Pulmonary hypertension due to left heart disease | ✔ Yes | Circulatory System |
| I2723 | Pulmonary hypertension due to lung diseases and hypoxia | ✔ Yes | Circulatory System |
| I2724 | Chronic thromboembolic pulmonary hypertension | ✔ Yes | Circulatory System |
| I2729 | Other secondary pulmonary hypertension | ✔ Yes | Circulatory System |
| I87301 | Chronic venous hypertension w/o comp of r low extrem | ✔ Yes | Circulatory System |
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How to Use This ICD-10-CM Lookup Tool
This free tool lets you search the complete ICD-10-CM code set used in the United States. You can search two ways:
- By keyword — type a condition name like diabetes, hypertension, or pneumonia to see all matching codes
- By code prefix — type a code like E11 to see all codes in that category
Understanding the Results
- Billable (✔ Yes) — this code can be used on a claim. It's specific enough to submit.
- Header — this is a category-level code. You must use a more specific child code for billing.
- Category — the ICD-10-CM chapter this code belongs to (e.g. Endocrine, Respiratory).
📋 CPC Exam Tip — ICD-10-CM Sequencing
On the CPC exam, always sequence the principal diagnosis first. For combination codes (a single code that captures two conditions), use the combination code rather than two separate codes. Check the Tabular List for "Use additional code" and "Code first" instructions.
Official ICD-10-CM Resources
This tool is for educational use. For official billing and compliance purposes, always verify codes against: