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M93.05 ICD-10-CM Code: Acute on chronic slipped upper femoral epiphysis, unstable (nontraumatic)

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Coding at a Glance

Tabular directives
1 Excludes1 · 1 Excludes2 · 1 use-additional code

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for M93.05 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on M93.05 itself; “inherited from” names the category or block whose note applies here.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Source: inherited from M91-M94

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Source: inherited from M93

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code for associated chondrolysis (M94.3)

Source: inherited from M93.0

Coder workflow for M93.05

MedCoder structured workflow — derived from this code’s own official record

Before you code M93.05

  1. M93.05 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

    ReviewM93.051, M93.052, M93.053, M93.054

    See the relationships section · Guide: How to choose an ICD-10-CM code →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with M93.05. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support one of the more specific codes beneath M93.05?
    Yes → Select that code and continue the checks below on its own page.
    No → M93.05 cannot be reported as written; query for the specificity its subcategory needs.

    ReviewM93.051, M93.052, M93.053, M93.054

  2. Does the documentation support a condition named in M93.05’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewM96

Consider M93.05. Then work the Use Additional Code note, and confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Acuity
Acute or chronic as documented; when both are documented and separate codes exist, both are reported with the acute code first (Guidelines I.B.8).
The conditions the Use Additional Code note names
Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.

Official instructions as workflow

  • Excludes1 — check before selecting M93.05(1 note)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with M93.05: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareM96

    See the official tabular notes · Guidelines I.A.12.a

  • Excludes2 — not part of M93.05(1 note)

    Coding workflow: The conditions named in this note are not included in M93.05. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareM42

    See the official tabular notes · Guidelines I.A.12.b

  • Use Additional Code — after identifying M93.05(1 note)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with M93.05 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    ReviewM94.3

    See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: Both the condition M93.05 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewM96

Documentation: A condition the Use Additional Code note names is documented.

Coding question: Is a second code reported with M93.05?

Path: Review the Use Additional Code note and the code it names.

Reason: The additional code is reported when the record documents the condition; a conditional instruction applies only when its condition is met (Guidelines I.A.13).

ReviewM94.3

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Don’t confuse M93.05 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of M93.05 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • M96— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of postprocedural chondropathies moves the case to M96; the two are not reported together unless documented as unrelated.

    Full comparison: M93.05 vs M96 →

  • M93.06— Specificity relationship (Review)

    Overlapping diagnoses in the same category.

    Overlapping codes in the same category — the documentation decides which is the more specific fit.

    What moves you there: A record that documents no more than “Acute slipped upper femoral epiphysis, unspecified stability (nontraumatic)” takes M93.06; specificity in the record moves it back here.

    Full comparison: M93.05 vs M93.06 →

  • M42— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of osteochondrosis of spine adds M42; it is not part of this code and both may be reported when both are documented.

    Full comparison: M93.05 vs M42 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Code Overview

Acute on chronic slipped upper femoral epiphysis, unstable (nontraumatic) is a non-billable ICD-10-CM category code (M93.05). A more specific billable subcode must be selected for claims submission.

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. 1 Use Additional Code instruction — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  2. 1 Excludes1 entry — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  3. 1 Excludes2 entry — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name M93.05 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 4 Excludes1 notes across 2 chapters: M87 — Osteonecrosis (via M93.-), M91 — Juvenile osteochondrosis of hip and pelvis (via M93.0.-), S72.13 — Apophyseal fracture of femur (via M93.0.-), S79.0 — Physeal fracture of upper end of femur (via M93.0.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 1 Code First instruction: M94.3 — Chondrolysis (via M93.0.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Contextual Map

Every relationship of M93.05 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run M93.05 with these 5 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

Referenced by Code First instructions

  • M94.3 — Chondrolysis[Code First](via M93.0.-): “any associated slipped upper femoral epiphysis (nontraumatic) (M93.0-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Nearest codes (40)

Change history

Common coding questions

Can M93.05 be billed directly?

No. M93.05 (Acute on chronic slipped upper femoral epiphysis, unstable (nontraumatic)) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "M93.05 — Acute on chronic slipped upper femoral epiphysis, unstable (nontraumatic)." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/m93.05-acute-on-chronic-slipped-upper-femoral-epiphysis-unstable-nontraumatic

Change history

  • FY2023 — October 1, 2022
    Added to the code set
    Acute on chronic slipped upper femoral epiphysis, unstable (nontraumatic)
    FY2023 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to M93.05 in its code family, with their registry titles.

View all codes in the M93 family