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S02.400A ICD-10-CM Code: Malar fracture, unspecified side, initial encounter for closed fracture

Compare with another codeCheck this code on a claim

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

7th character
Required — see the character table on this page
Tabular directives
12 inclusion terms · 9 Excludes2 · 2 code-also instructions
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 167

Billable · FY2027A valid, specific ICD-10-CM code, reportable for dates of service in FY2027.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too; the Instructions section marks which is which.

Code alsoMay be needed with this code
  • any associated intracranial injury (S06.-)
  • for any associated infection
Excludes2Not included here; may be reported together
  • burns and corrosions (T20-T32)
  • effects of foreign body in ear (T16)
  • effects of foreign body in larynx (T17.3)
  • effects of foreign body in mouth NOS (T18.0)

+5 more in Instructions

IncludesWhat this code covers
  • injuries of ear
  • injuries of eye
  • injuries of face [any part]
  • injuries of gum

+8 more in Instructions

Most relevant related codes MedCoder-derived

Read off the official notes above and this code’s own position in the tabular list. Which to report is a documentation question; Compare shows the two side by side.

CompareCheck ClaimView Related Codes

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v44, Appendix B.

  • MS-DRG 011 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH MCC (MDC PRE)
  • MS-DRG 012 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH CC (MDC PRE)
  • MS-DRG 013 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITHOUT CC/MCC (MDC PRE)
  • MS-DRG 157 — DENTAL AND ORAL DISEASES WITH MCC (MDC 03)
  • MS-DRG 158 — DENTAL AND ORAL DISEASES WITH CC (MDC 03)
  • MS-DRG 159 — DENTAL AND ORAL DISEASES WITHOUT CC/MCC (MDC 03)
  • MS-DRG 963 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC (MDC 24)
  • MS-DRG 964 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH CC (MDC 24)
  • MS-DRG 965 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITHOUT CC/MCC (MDC 24)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

  • HCC 399 — Major Head Injury without Loss of Consciousness

Other models: CMS-HCC V22 HCC 167

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for S02.400A 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 S02.400A itself; “inherited from” names the category or block whose note applies here.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • injuries of ear
  • injuries of eye
  • injuries of face [any part]
  • injuries of gum
  • injuries of jaw
  • injuries of oral cavity
  • injuries of palate
  • injuries of periocular area
  • injuries of scalp
  • injuries of temporomandibular joint area
  • injuries of tongue
  • injuries of tooth

Source: inherited from S00-S09

Excludes2 — Not Included Here

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

Source: inherited from S00-S09

Code Also

Additional codes that may be required to fully describe the encounter.

  • any associated intracranial injury (S06.-) inherited from S02
  • for any associated infection inherited from S00-S09

7th Character Guide

"The appropriate 7th character is to be added to each code from category S02"

  • A — initial encounter for closed fracture (this page’s code)
  • B — initial encounter for open fracture
  • D — subsequent encounter for fracture with routine healing
  • G — subsequent encounter for fracture with delayed healing
  • K — subsequent encounter for fracture with nonunion
  • S — sequela

How the encounter character is assigned. “Initial encounter” means the patient is receiving active treatment for the condition — it is not limited to the first visit, and a different or new provider giving active treatment still assigns it. “Subsequent encounter” covers care during the healing or recovery phase after active treatment. “Sequela” is for complications or conditions that arise as a direct result of the original condition.

ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19.a (paraphrased by MedCoder).

Variant codes in this family

S02.400A, S02.400B, S02.400D, S02.400G, S02.400K, S02.400S

Character meanings are CMS's official 7th-character extensions for this family, as carried in each variant code's official description; variant codes are registry rows. The explanation of how the encounter character is assigned is MedCoder editorial, distinct from the official content above it.

Coder workflow for S02.400A

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

Before you code S02.400A

  1. Unspecified does not mean incorrect. When the record gives no greater specificity, S02.400A may be the appropriate code. Check the record for detail that supports a more specific sibling — in this subcategory the siblings differ by open versus closed. An unspecified code is for records that do not provide the detail a more specific code needs; a query, not an assumption, is the route to specificity (Guidelines I.A.9.b, I.B.18).

    See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

  2. A 7th character is required in this family. Confirm the documented encounter: initial (active treatment), subsequent (healing or recovery phase), or sequela. This page’s code carries “A”. “Initial” means active treatment, not the first visit (Guidelines I.C.19.a).

    See the 7th Character Guide · Guide: 7th characters: initial, subsequent, sequela →

  3. Confirm the injury type, the anatomical site at the most specific level documented, laterality where the family codes it, and the encounter for the 7th character. Each injury is coded separately unless the classification provides a combination code, and a superficial injury is not coded when a more severe injury of the same site is documented. A fracture not documented as open or closed is coded as closed; one not documented as displaced or nondisplaced is coded as displaced. Injury chapter guidelines (Guidelines I.C.19.b, I.C.19.b.1, I.C.19.c).

    Guide: Traumatic vs pathological vs stress fracture →

Choose the right path

  1. Does the record document the detail a more specific sibling code needs?
    Yes → Review the specific siblings in this subcategory.
    No → Continue — S02.400A is appropriate when the documentation goes no further.
  2. Is the encounter phase documented — active treatment, healing or recovery, or a sequela?
    Yes → Assign the matching 7th character; the variant codes are in the 7th Character Guide.
    No → The code is invalid without its 7th character — query for the missing element.

Consider S02.400A. Then review the Code Also 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).
Anatomical site
At the most specific level the record states; a site the classification separates cannot be assumed from a procedure or a measurement.
Encounter type
Active treatment, healing or recovery phase, or sequela — the basis of the 7th character (Guidelines I.C.19.a).
Open or closed; displaced or nondisplaced
Defaults apply when the record is silent: closed, and displaced (Guidelines I.C.19.c).
External cause, place and activity
For the external cause codes reported with the injury or poisoning, where documented (Guidelines I.C.20.a).
Any detail beyond this code’s title
What the record states that a more specific sibling code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

  • Excludes2 — not part of S02.400A(9 notes)

    Coding workflow: The conditions named in this note are not included in S02.400A. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareT16, T17.3, T18.0, T17.2, T15, T63.4

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

  • Code Also — related condition(2 notes)

    Coding workflow: Review the related condition when both are documented and the instruction applies. A Code Also note does not fix sequencing; the order follows the circumstances of the encounter.

    ReviewS06

    See the official tabular notes · Guidelines I.A.17

Coding decision scenarios

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

Documentation: The provider documents the condition in the terms of this code’s title and records no further detail.

Coding question: Is a more specific sibling code supportable?

Path: Review the subcategory for a sibling that names the missing detail.

Reason: A more specific code needs documentation of the distinguishing element; without it the unspecified code is appropriate, and a provider query is the route to specificity (Guidelines I.A.9.b, I.B.18).

Documentation: The patient returns during the healing or recovery phase after active treatment of the same condition.

Coding question: Which 7th character applies?

Path: Review the official 7th-character definitions for this family in the 7th Character Guide.

Reason: “Initial encounter” means active treatment, not the first visit; care during recovery takes “subsequent encounter”, and a complication arising from the original condition takes “sequela” (Guidelines I.C.19.a).

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 S02.400A with…

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

The codes most likely to be picked instead of S02.400A — 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.

  • S02.400B— Encounter relationship (Review)

    Same underlying diagnosis, different encounter phase.

    The same diagnosis at a different phase of care; one encounter takes one 7th character.

    What moves you there: Documentation of a initial encounter for open fracture moves the case to S02.400B.

    Full comparison: S02.400A vs S02.400B →

  • S02.400D— Encounter relationship (Review)

    Same underlying diagnosis, different encounter phase.

    The same diagnosis at a different phase of care; one encounter takes one 7th character.

    What moves you there: Documentation of a subsequent encounter for fracture with routine healing moves the case to S02.400D.

    Full comparison: S02.400A vs S02.400D →

  • T20— 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 burns and corrosions adds T20; it is not part of this code and both may be reported when both are documented.

    Full comparison: S02.400A vs T20 →

  • T32— 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 burns and corrosions adds T32; it is not part of this code and both may be reported when both are documented.

    Full comparison: S02.400A vs T32 →

  • T16— 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 effects of foreign body in ear adds T16; it is not part of this code and both may be reported when both are documented.

    Full comparison: S02.400A vs T16 →

  • T17.3— 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 effects of foreign body in larynx adds T17.3; it is not part of this code and both may be reported when both are documented.

    Full comparison: S02.400A vs T17.3 →

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.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Malar fracture, unspecified side, initial encounter for closed fracture is a billable ICD-10-CM diagnosis code (S02.400A).

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

Official Coding Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Verbatim excerpts from the ICD-10-CM Official Guidelines for Coding and Reporting (CMS/NCHS) that govern this code.

Chapter 19: Injury, poisoning, and certain other consequences of external causes (S00-T88)

c. Coding of Traumatic Fractures The principles of multiple coding of injuries should be followed in coding fractures. Fractures of specified sites are coded individually by site in accordance with both the provisions within categories S02, S12, S22, S32, S42, S49, S52, S59, S62, S72, S79, S82, S89, S92 and the level of detail furnished by medical record content.

Decision Points

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

  1. A 7th character applies in this family. Confirm the documented encounter matches the character assigned. See the official 7th-character definitions and this code’s variants
  2. 2 Code Also notes — a second code may apply; the guidelines leave its sequencing to the circumstances of the encounter. See the Code Also notes
  3. 9 Excludes2 entries — 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

  • CC as a secondary diagnosis (FY2027). Can raise the stay's MS-DRG severity tier.

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-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name S02.400A 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 1 Excludes1 note: S01 — Open wound of head (via S02.-).

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: R40.2 — Coma (via S02.-).

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.

Referenced by 1 Use Additional Code instruction: S07 — Crushing injury of head (via S02.-).

These codes instruct coders to additionally report this code when it applies.

Referenced by 5 Code Also instructions across 2 chapters: G96.00 — Cerebrospinal fluid leak, unspecified (via S02.-), G96.08 — Other cranial cerebrospinal fluid leak (via S02.-), G96.09 — Other spinal cerebrospinal fluid leak (via S02.-), S04 — Injury of cranial nerve (via S02.-), S06 — Intracranial injury (via S02.-).

These codes suggest coding this condition alongside when both are present.

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 MS-DRG: CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 459 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 9 MS-DRGs: DRG 011 (MDC PRE), DRG 012 (MDC PRE), DRG 013 (MDC PRE), DRG 157 (MDC 03), DRG 158 (MDC 03), DRG 159 (MDC 03), DRG 963 (MDC 24), DRG 964 (MDC 24), DRG 965 (MDC 24).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):INJ001 — Fracture of head and neck, initial encounter (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same condition, opposite side

Same category and title, differing only in which side of the body is affected.

S02.40AA — Malar fracture, right side, initial encounter for closed fracture (right)Compare S02.400A vs S02.40AA →, S02.40BA — Malar fracture, left side, initial encounter for closed fracture (left)Compare S02.400A vs S02.40BA →

Same injury, other encounter phase

Same injury, coded at a different phase of treatment via the 7th character.

S02.400B — Malar fracture, unspecified side, initial encounter for open fractureCompare S02.400A vs S02.400B →, S02.400D — Malar fracture, unspecified side, subsequent encounter for fracture with routine healingCompare S02.400A vs S02.400D →, S02.400G — Malar fracture, unspecified side, subsequent encounter for fracture with delayed healingCompare S02.400A vs S02.400G →, S02.400K — Malar fracture, unspecified side, subsequent encounter for fracture with nonunionCompare S02.400A vs S02.400K →, S02.400S — Malar fracture, unspecified side, sequelaCompare S02.400A vs S02.400S →

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Major Head Injury without Loss of Consciousness) for risk-adjusted payment.

S02.129A — Fracture of orbital roof, unspecified side, initial encounter for closed fracture, S02.129B — Fracture of orbital roof, unspecified side, initial encounter for open fracture, S02.19XA — Other fracture of base of skull, initial encounter for closed fracture, S02.19XB — Other fracture of base of skull, initial encounter for open fracture, S02.30XA — Fracture of orbital floor, unspecified side, initial encounter for closed fracture, S02.30XB — Fracture of orbital floor, unspecified side, initial encounter for open fracture, S02.31XA — Fracture of orbital floor, right side, initial encounter for closed fracture, S02.31XB — Fracture of orbital floor, right side, initial encounter for open fracture, S02.32XA — Fracture of orbital floor, left side, initial encounter for closed fracture, S02.32XB — Fracture of orbital floor, left side, initial encounter for open fracture, S02.400B — Malar fracture, unspecified side, initial encounter for open fracture, S02.401A — Maxillary fracture, unspecified side, initial encounter for closed fracture, S02.401B — Maxillary fracture, unspecified side, initial encounter for open fracture, S02.402A — Zygomatic fracture, unspecified side, initial encounter for closed fracture, S02.402B — Zygomatic fracture, unspecified side, initial encounter for open fracture, S02.40AA — Malar fracture, right side, initial encounter for closed fracture, S02.40AB — Malar fracture, right side, initial encounter for open fracture, S02.40BA — Malar fracture, left side, initial encounter for closed fracture, S02.40BB — Malar fracture, left side, initial encounter for open fracture, S02.40CA — Maxillary fracture, right side, initial encounter for closed fracture, +168 more

Related risk categories

These categories interact through CMS's HCC hierarchy — one can suppress the other's risk-adjustment weight when both are present on a claim.

Major Head Injury with Loss of Consciousness > 1 Hour, Major Head Injury with Loss of Consciousness < 1 Hour or Unspecified

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Fracture of head and neck, initial encounter).

S02.19XA — Other fracture of base of skull, initial encounter for closed fracture, S02.19XB — Other fracture of base of skull, initial encounter for open fracture, S02.2XXA — Fracture of nasal bones, initial encounter for closed fracture, S02.2XXB — Fracture of nasal bones, initial encounter for open fracture, S02.30XA — Fracture of orbital floor, unspecified side, initial encounter for closed fracture, S02.30XB — Fracture of orbital floor, unspecified side, initial encounter for open fracture, S02.31XA — Fracture of orbital floor, right side, initial encounter for closed fracture, S02.31XB — Fracture of orbital floor, right side, initial encounter for open fracture, S02.32XA — Fracture of orbital floor, left side, initial encounter for closed fracture, S02.32XB — Fracture of orbital floor, left side, initial encounter for open fracture, S02.400B — Malar fracture, unspecified side, initial encounter for open fracture, S02.401A — Maxillary fracture, unspecified side, initial encounter for closed fracture, S02.401B — Maxillary fracture, unspecified side, initial encounter for open fracture, S02.402A — Zygomatic fracture, unspecified side, initial encounter for closed fracture, S02.402B — Zygomatic fracture, unspecified side, initial encounter for open fracture, S02.40AA — Malar fracture, right side, initial encounter for closed fracture, S02.40AB — Malar fracture, right side, initial encounter for open fracture, S02.40BA — Malar fracture, left side, initial encounter for closed fracture, S02.40BB — Malar fracture, left side, initial encounter for open fracture, S02.40CA — Maxillary fracture, right side, initial encounter for closed fracture, +131 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Partial Thromboplastin Time (PTT) Test, Prothrombin Time Test and INR (PT/INR)

Contextual Map

Every relationship of S02.400A 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 S02.400A with these 8 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

  • S01 — Open wound of head[Excludes1](via S02.-): “open skull fracture (S02.- with 7th character B)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027

Referenced by Code First instructions

  • R40.2 — Coma[Code First](via S02.-): “fracture of skull (S02.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027

Referenced by Use Additional Code instructions

  • S07 — Crushing injury of head[Use Additional Code](via S02.-): “skull fractures (S02.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027

Referenced by Code Also instructions

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 399 — Major Head Injury without Loss of Consciousness [CMS-HCC]— CMS-HCC V28 · 2026

MS-DRG Grouper (9)

MDC crossing

  • Pre-MDC[MDC crossing]: “Pre-MDC — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 175 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027
  • MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat[MDC crossing]: “Diseases and Disorders of the Ear, Nose, Mouth and Throat — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 5,151 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Index entries

  • Fracture, traumatic (abduction) (adduction) (separation), malar bone[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027

Nearest codes (40)

Change history (3)

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Indexed Clinical Terms (1)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Common coding questions

MedCoder editorial

Does S02.400A require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category S02.

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
Coding guidelines Official source data
ICD-10-CM Official Guidelines for Coding and Reporting (FY2027), quoted by section 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
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44 Release, file and checksum · Publisher’s page
Risk adjustment Official source data
2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release 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-derived 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 editorial 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.

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

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

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. "S02.400A — Malar fracture, unspecified side, initial encounter for closed fracture." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/s02.400a-malar-fracture-unspecified-side-initial-encounter-for-closed-fracture

Change history

  • FY2017 — October 1, 2016
    Description revised
    Malar fracture unspecified, initial encounter for closed fracture → Malar fracture, unspecified side, initial encounter for closed fracture
    FY2017 changes
  • FY2017 — October 1, 2016
    Short description revised
    Malar fracture unspecified, init encntr for closed fracture → Malar fracture, unspecified side, init
    FY2017 changes
  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Malar fracture unspecified, initial encounter for closed fracture

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S02.400A in its code family, with their registry titles.

View all codes in the S02 family