E83.01 vs K70-K77

E83.01 (Wilson's disease) compared with K70-K77 (Diseases of liver (K70-K77)), from the official CMS tabular data.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources

Summary

These codes can be reported together when both conditions are documented, because K70-K77 lists E83.01 under Excludes2, which marks them as distinct conditions.

Official rule

What is different?

The conditions named, billing status and chapter.E83.01 is “Wilson's disease”; K70-K77 is “Diseases of liver (K70-K77)”. K70-K77 is a non-billable header; E83.01 is billable. E83.01 sits in E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89); K70-K77 in K00-K95 — Diseases of the Digestive System (K00-K95).

Registry fact

Can these codes be reported together?

Yes, when both are documented.K70-K77 lists E83.01 under Excludes2: “Wilson's disease (E83.01)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. E83.01 carries 8 Excludes1 notes and K70-K77 carries 1 Excludes1 note covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.K70-K77’s tabular entry: “Wilson's disease (E83.01)”. The note covers E83.01.

Official ruleGuide: Excludes1 vs Excludes2

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

One is a header.K70-K77 is a non-billable header, but E83.01 is not one of its subdivisions.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

K70-K77

Diseases of liver (K70-K77)

↔

E83.01

Wilson's disease

What we found

Yes, when both are documented.K70-K77 carries an Excludes2 note covering E83.01: “Wilson's disease (E83.01)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2 Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

Section I.A.12.b — Excludes2 · applies to: Excludes2
A type 2 Excludes note represents “Not included here.” An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
ICD-10-CM Official Guidelines FY2027

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

	E83.01Wilson's disease	K70-K77Diseases of liver (K70-K77)
Billing status	Billable	Non-billable header
Classification	E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89)	K00-K95 — Diseases of the Digestive System (K00-K95)
Definition	Wilson's disease is a billable ICD-10-CM diagnosis code (E83.01).	Diseases of liver (K70-K77) is a non-billable ICD-10-CM category code (K70-K77).
Excludes1	dietary mineral deficiency (E58-E61) parathyroid disorders (E20-E21) vitamin D deficiency (E55.-) androgen insensitivity syndrome (E34.5-) congenital adrenal hyperplasia (E25.0) hemolytic anemias attributable to enzyme disorders (D55.-) Marfan syndrome (Q87.4-) 5-alpha-reductase deficiency (E29.1)	jaundice NOS (R17)
Excludes2	Ehlers-Danlos syndromes (Q79.6-)	hemochromatosis (E83.11-) Reye's syndrome (G93.7) viral hepatitis (B15-B19) Wilson's disease (E83.01)
Code also	associated Kayser Fleischer ring (H18.04-)	—

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

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Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources