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M15-M19 vs M47

M15-M19 (Osteoarthritis (M15-M19)) compared with M47 (Spondylosis), from the official CMS tabular data.

Summary

These codes can be reported together when both conditions are documented, because M15-M19 lists M47 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named.M15-M19 is “Osteoarthritis (M15-M19)”; M47 is “Spondylosis”.

Registry fact

Can these codes be reported together?

Yes, when both are documented.M15-M19 lists M47 under Excludes2: “osteoarthritis of spine (M47.-)”. 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.

Official rule

Is there an Excludes2 relationship?

Yes.M15-M19’s tabular entry: “osteoarthritis of spine (M47.-)”. The note covers M47.

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?

Both are headers.Both are non-billable headers, 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

M15-M19
Osteoarthritis (M15-M19)
↔
M47
Spondylosis

What we found

Yes, when both are documented.M15-M19 carries an Excludes2 note covering M47: “osteoarthritis of spine (M47.-)”

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 FY2026

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

M15-M19Osteoarthritis (M15-M19)M47Spondylosis
Billing statusNon-billable headerNon-billable header

Report instead: M47.011, M47.012, M47.013, M47.014, M47.015

ClassificationM00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
DefinitionOsteoarthritis (M15-M19) is a non-billable ICD-10-CM category code (M15-M19).Spondylosis is a non-billable ICD-10-CM category code (M47).
Includes—
arthrosis or osteoarthritis of spine
degeneration of facet joints
Excludes2
osteoarthritis of spine (M47.-)
—

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.

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