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K08.0 vs K08.401

K08.0 (Exfoliation of teeth due to systemic causes) compared with K08.401 (Partial loss of teeth, unspecified cause, class I), 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 28, 2026 · All releases and sources

Summary

These codes can be reported together when both conditions are documented, because K08.401 lists K08.0 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named.K08.0 is “Exfoliation of teeth due to systemic causes”; K08.401 is “Partial loss of teeth, unspecified cause, class I”.

Registry fact

Can these codes be reported together?

Yes, when both are documented.K08.401 lists K08.0 under Excludes2: “exfoliation of teeth due to systemic causes (K08.0)”. 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. K08.401 carries 2 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.K08.401’s tabular entry: “exfoliation of teeth due to systemic causes (K08.0)”. The note covers K08.0.

Official ruleGuide: Excludes1 vs Excludes2

Is one more specific?

Yes.K08.0’s title names the condition; K08.401’s title is the unspecified form (“Partial loss of teeth, unspecified cause, class I”).

MedCoder-derivedGuide: Other vs unspecified (NEC vs NOS)

Is one a parent or header code?

No.Both are billable codes, and neither contains the other.

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

K08.401
Partial loss of teeth, unspecified cause, class I
↔
K08.0
Exfoliation of teeth due to systemic causes

What we found

Yes, when both are documented.K08.401 carries an Excludes2 note covering K08.0: “exfoliation of teeth due to systemic causes (K08.0)”

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 Excludes2Check 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

Similar descriptions do not make codes interchangeable. The documentation and the official instructions decide which code applies.

Official descriptionDiffers
K08.0

Exfoliation of teeth due to systemic causes

K08.401

Partial loss of teeth, unspecified cause, class I

StatusSame for both
Billable
Excludes1Differs
K08.0

None at this code

K08.401
  • complete loss of teeth (K08.1-)
  • congenital absence of teeth (K00.0)
Excludes2Differs
K08.0
  • dentofacial anomalies [including malocclusion] (M26.-)
  • disorders of jaw (M27.-)
K08.401
  • exfoliation of teeth due to systemic causes (K08.0)
  • dentofacial anomalies [including malocclusion] (M26.-)
  • disorders of jaw (M27.-)
Code alsoDiffers
K08.0
  • underlying systemic condition
K08.401

None at this code

CategorySame for both

K08 Other disorders of teeth and supporting structures

ChapterSame for both

K00-K95 — Diseases of the Digestive System (K00-K95)

No Code first, Use additional code, Includes and 7th character note at either code.

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. In a row that differs, notes every code shares are dimmed.

Edit this comparisonCheck a whole claim

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