ICD-10-CM Tag Lists · FY 2026 19 Lists

2026 ICD-10-CM Code Lists by Tag ICD-10-CM

Tag lists cut across the chapter hierarchy and group ICD-10-CM codes by the questions coders actually ask: is it billable, what encounter character does it take, what poisoning intent applies, what neoplasm behavior was documented. Each list below is curated from the official FY 2026 dataset and links every code group to its place in the tabular index.

✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026
19
Tag Lists
98,186
Codes Indexed
74,719
Billable Codes
FY 2026
Dataset
Billing Status
74,719Billable Codesthe FY 2026 billable ICD-10-CM codes valid for HIPAA claims, organized by code block with links to every complete list.23,467Non-Billable Codesthe FY 2026 non-billable ICD-10-CM header codes that need additional characters before they are valid for HIPAA claims.
Encounter Type (7th Character)
14,576Initial EncounterFY 2026 initial encounter ICD-10-CM codes (7th character A) for documenting active treatment, organized by code block.22,194Subsequent EncounterFY 2026 subsequent encounter ICD-10-CM codes (7th character D) for follow-up care during recovery, organized by code block.12,743SequelaFY 2026 sequela ICD-10-CM codes (7th character S) for chronic and residual conditions from past injuries or illnesses.51,4857th Character Codesevery FY 2026 ICD-10-CM code that requires a 7th character to report the encounter as initial, subsequent, or sequela.
Specificity
30,368Unspecified CodesFY 2026 unspecified ICD-10-CM codes, used when patient records lack the detail for a more specific diagnosis.
Table of Drugs and Chemicals
287Accidental PoisoningAll FY 2026 accidental poisoning ICD-10-CM codes with the substances that map to each code, searchable by drug name.287Intentional PoisoningAll FY 2026 intentional self-harm poisoning ICD-10-CM codes with the substances that map to each code, searchable by drug name.287Assault PoisoningAll FY 2026 assault poisoning ICD-10-CM codes for poisonings inflicted by another person, with the substances that map to each code.287Undetermined PoisoningAll FY 2026 undetermined intent poisoning ICD-10-CM codes, used when documentation cannot establish intent, searchable by substance.2,116Adverse EffectsAll FY 2026 adverse effect ICD-10-CM codes for harmful reactions to drugs taken as prescribed, searchable by substance.2,116UnderdosingAll FY 2026 underdosing ICD-10-CM codes for patients taking less medication than prescribed, searchable by substance.
Table of Neoplasms
364Primary Malignant NeoplasmsAll FY 2026 primary malignant neoplasm ICD-10-CM codes for cancers coded at their site of origin, searchable by anatomical site.38Secondary Malignant NeoplasmsAll FY 2026 secondary malignant neoplasm ICD-10-CM codes for metastatic cancer sites, searchable by anatomical site.58Carcinoma In SituAll FY 2026 carcinoma in situ ICD-10-CM codes for early-stage, non-invasive cancers, searchable by anatomical site.315Benign NeoplasmsAll FY 2026 benign neoplasm ICD-10-CM codes for non-cancerous tumors and growths, searchable by anatomical site.128Uncertain BehaviorAll FY 2026 ICD-10-CM codes for neoplasms of uncertain behavior, used when malignancy cannot be confirmed, searchable by site.12Unspecified BehaviorAll FY 2026 ICD-10-CM codes for neoplasms of unspecified behavior, used when the record lacks behavior detail, searchable by site.

Questions About This Page

What is a tag list?

A tag list collects every ICD-10-CM code that shares one coding property, no matter which chapter it lives in. The billable list spans all 22 chapters; the intentional poisoning list collects the self-harm codes of the Table of Drugs and Chemicals.

How are large lists organized?

Lists with thousands of codes are grouped by code block. Each group shows its count and links straight to the block's page in the tabular index, which lists every code with full detail.

Related References

Table of Drugs and ChemicalsTable of NeoplasmsICD-10-CM Codes ListICD-10-CM Code Lookup

Source: official CMS FY 2026 ICD-10-CM release, effective October 1, 2025 through September 30, 2026.