ICD-10-CM vs ICD-10-PCS: A Coder's Guide
When to use ICD-10-CM vs ICD-10-PCS, how their formats differ, who reports each, and why outpatient claims never carry PCS codes. A coder's decision guide.
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All articles about billing: 4 practical guides and tutorials from our free, privacy-first online tools.
Billable vs Non-Billable ICD-10-CM Codes (Specificity Rules)
How to tell billable ICD-10 codes from non-billable header codes: full specificity, the terminal-code rule, 7th-character requirements, and why claims reject.
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How to Look Up an ICD-10-CM Code (Step by Step)
Learn how to look up an ICD-10 code the right way: start in the Alphabetic Index, verify in the Tabular List, and confirm a valid, billable 2026 code.
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Understanding ICD-10 Codes: Structure and Billing
A practical guide to ICD-10-CM diagnosis codes: how they are structured, what makes a code billable, how to read Excludes notes, and how to look codes up fast.
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