026 ICD-10-CM Master Update Cheat Sheet — New, Revised and Deleted Codes

Every October 1st the ICD-10-CM code set changes. New codes are added. Old codes are revised. Deleted codes are retired — and any claim submitted with a deleted code after October 1, 2025 will be denied automatically, regardless of the date of service.

This cheat sheet gives you every high-priority change you need to know. Color-coded. Concise. Printable. No 900-page manual. No searching through the full tabular list. Just the updates — organized for fast, accurate reference at your workstation.

2026 ICD-10-CM Master Update Cheat Sheet is the streamlined, color-coded visual reference guide for medical coders, billers, and health information management professionals who need to stay current with the 2026 fiscal year code changes without wading through large manuals or lengthy update documents.

Green for new. Blue for revised. Red for deleted. Every entry includes the code, the description, and exactly what you need to do differently starting October 1, 2025.

What's Inside:

✅ Introduction — How to use this cheat sheet, the color-coding system explained, and a snapshot of the 2026 update cycle — 395+ new codes, 200+ revised codes, and 60+ deleted codes across all chapters

✅ Chapter 1 — 2026 ICD-10-CM code updates overview — the key themes driving this year's changes, the most impacted chapters by specialty, and a chapter-by-chapter impact table showing new, revised, and deleted counts at a glance

✅ Chapter 2 — New medical codes for 2026 — 25 high-priority new codes with official descriptions and real-world coding examples covering infectious disease, neoplasms, cardiovascular, respiratory, musculoskeletal, mental health, injury and trauma, and Z codes — including U09.9 (post-COVID), I50.43 (acute-on-chronic combined HF), M54.51 (vertebrogenic low back pain), T14.91XA (suicide attempt), and more

✅ Chapter 3 — Revised codes for 2026 — 12 high-impact revised codes with clear before-and-after comparisons including I10 (hypertension — Excludes2 updated), N18.3 (CKD Stage 3 — split into 3a and 3b), K21.00 (GERD — Barrett's esophagus clarification), F84.0 (ASD — Asperger syndrome deleted), and E11.65A (Type 2 diabetes — insulin pump 7th character)

✅ Chapter 4 — Deleted codes for 2026 — 14 deleted codes with crosswalk to the correct replacement codes including M54.5 (low back pain — deleted), R73.0 (abnormal glucose — deleted), F84.5 (Asperger syndrome — deleted), G47.30 (sleep apnea unspecified — deleted), and N18.3 (CKD Stage 3 unspecified — deleted)

✅ Chapter 5 — Chapter-by-chapter 2026 changes summary — all 9 major chapters with color-coded new, revised, and deleted counts plus key highlights for each chapter so you can quickly identify what changed in your specialty area

✅ Chapter 6 — Excludes1, Excludes2 and coding guideline updates — the critical difference between Excludes1 and Excludes2 with 2026 changes to each, plus official guideline updates for COVID-19 coding, hypertension with CKD, obstetric coding, suicide attempt coding, and outpatient uncertain diagnosis guidelines

✅ Chapter 7 — Common coding scenarios — 8 real-world clinical documentation scenarios showing exactly how to apply the new codes correctly, with rationale and a common mistakes section for each scenario

✅ Bonus — Printable Quick Reference Cheat Sheet — three dense, print-ready reference tables covering 25 new codes, 12 revised codes, and 10 deleted codes with replacement crosswalk — formatted to print and laminate as a desk reference for the entire 2026 fiscal year

This guide is perfect for:

• Medical coders (outpatient, inpatient, physician office, facility)
• Medical billers and revenue cycle professionals
• Health information management (HIM) professionals
• Coding students preparing for CPC, CCS, or RHIA examinations
• Compliance officers and CDI specialists reviewing 2026 documentation requirements
• Coding educators and supervisors who need to brief their teams on key 2026 changes
• Any healthcare professional who relies on accurate ICD-10-CM coding

Denials from deleted codes cost your organization time and money.

Every minute you spend searching through update documents for the codes you actually need is time you are not spending coding. This cheat sheet puts the 2026 updates in your hands in a format designed for the way coders actually work — fast, visual, and at the desk.

Color-Coded. Concise. Compliant. Every update you need. None of the fluff.

Instant digital download. Stay compliant starting today.

Important Note: ICD-10-CM codes are maintained by the CDC and CMS. Always verify codes with official coding resources and your organization's compliance guidelines. This guide is a reference supplement — not a substitute for the official ICD-10-CM tabular list.

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