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S28.1XXA ICD-10-CM Code: Traumatic amputation (partial) of part of thorax, except breast, initial encounter

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
3 inclusion terms · 11 Excludes2

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 v43, Appendix B.

  • MS-DRG 604 — TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITH MCC (MDC 09)
  • MS-DRG 605 — TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITHOUT MCC (MDC 09)
  • 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.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for S28.1XXA in the official ICD-10-CM tabular list, quoted as published.

Notes without a marker are published on S28.1XXA 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 breast
  • injuries of chest (wall)
  • injuries of interscapular area

Source: inherited from S20-S29

Excludes2 — Not Included Here

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

Source: inherited from S20-S29

7th Character Guide

"The appropriate 7th character is to be added to each code from category S28"

  • A — initial encounter (this page’s code)
  • D — subsequent encounter
  • 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

S28.1XXA, S28.1XXD, S28.1XXS

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 S28.1XXA

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

Before you code S28.1XXA

  1. 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 →

  2. 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. Injury chapter guidelines (Guidelines I.C.19.b, I.C.19.b.1).

    Guide: 7th characters: initial, subsequent, sequela →

Choose the right path

  1. 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 S28.1XXA. Then 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).
External cause, place and activity
For the external cause codes reported with the injury or poisoning, where documented (Guidelines I.C.20.a).

Official instructions as workflow

  • Excludes2 — not part of S28.1XXA(11 notes)

    Coding workflow: The conditions named in this note are not included in S28.1XXA. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareT17.5, T18.1, T17.8, T17.4, T63.4

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

Coding decision scenarios

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

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.

Code Overview

Traumatic amputation (partial) of part of thorax, except breast, initial encounter is a billable ICD-10-CM diagnosis code (S28.1XXA).

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

Verify Before Coding

  • CC as a secondary diagnosis (FY2026). 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 structured relationships — computed from published CMS and AHRQ datasets

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

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 95 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 5 MS-DRGs: DRG 604 (MDC 09), DRG 605 (MDC 09), 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):INJ015 — Amputation of other body parts, 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 clinical process (MS-DRG)

Acts as CC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

S27.53XA — Laceration of thoracic trachea, initial encounter, S27.59XA — Other injury of thoracic trachea, initial encounter, S27.60XA — Unspecified injury of pleura, initial encounter, S27.63XA — Laceration of pleura, initial encounter, S27.69XA — Other injury of pleura, initial encounter, S27.892A — Contusion of other specified intrathoracic organs, initial encounter, S27.893A — Laceration of other specified intrathoracic organs, initial encounter, S27.898A — Other injury of other specified intrathoracic organs, initial encounter, S27.899A — Unspecified injury of other specified intrathoracic organs, initial encounter, S27.9XXA — Injury of unspecified intrathoracic organ, initial encounter, S29.021A — Laceration of muscle and tendon of front wall of thorax, initial encounter, S29.029A — Laceration of muscle and tendon of unspecified wall of thorax, initial encounter, S38.3XXA — Transection (partial) of abdomen, initial encounter, T07.XXXA — Unspecified multiple injuries, initial encounter, T14.8XXA — Other injury of unspecified body region, initial encounter, T14.90XA — Injury, unspecified, initial encounter, T14.91XA — Suicide attempt, initial encounter, T79.7XXA — Traumatic subcutaneous emphysema, initial encounter, T79.8XXA — Other early complications of trauma, initial encounter, T79.9XXA — Unspecified early complication of trauma, initial encounter, +74 more

Same injury, other encounter phase

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

S28.1XXD — Traumatic amputation (partial) of part of thorax, except breast, subsequent encounterCompare S28.1XXA vs S28.1XXD →, S28.1XXS — Traumatic amputation (partial) of part of thorax, except breast, sequelaCompare S28.1XXA vs S28.1XXS →

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Amputation of other body parts, initial encounter).

S08.111A — Complete traumatic amputation of right ear, initial encounter, S08.112A — Complete traumatic amputation of left ear, initial encounter, S08.119A — Complete traumatic amputation of unspecified ear, initial encounter, S08.121A — Partial traumatic amputation of right ear, initial encounter, S08.122A — Partial traumatic amputation of left ear, initial encounter, S08.129A — Partial traumatic amputation of unspecified ear, initial encounter, S08.811A — Complete traumatic amputation of nose, initial encounter, S08.812A — Partial traumatic amputation of nose, initial encounter, S08.89XA — Traumatic amputation of other parts of head, initial encounter, S28.211A — Complete traumatic amputation of right breast, initial encounter, S28.212A — Complete traumatic amputation of left breast, initial encounter, S28.219A — Complete traumatic amputation of unspecified breast, initial encounter, S28.221A — Partial traumatic amputation of right breast, initial encounter, S28.222A — Partial traumatic amputation of left breast, initial encounter, S28.229A — Partial traumatic amputation of unspecified breast, initial encounter, S38.211A — Complete traumatic amputation of female external genital organs, initial encounter, S38.212A — Partial traumatic amputation of female external genital organs, initial encounter, S38.221A — Complete traumatic amputation of penis, initial encounter, S38.222A — Partial traumatic amputation of penis, initial encounter, S38.231A — Complete traumatic amputation of scrotum and testis, initial encounter, +2 more

Contextual Map

Every relationship of S28.1XXA 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.

Hierarchy

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 09 — Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast[MDC crossing]: “Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast — 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. 7,376 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026
  • MDC 24 — Multiple Significant Trauma[MDC crossing]: “Multiple Significant Trauma — 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. 22,957 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Nearest codes (35)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Common coding questions

Does S28.1XXA require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category S28.

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 FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 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 — v43 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

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Traumatic amputation (partial) of part of thorax, except breast, initial encounter

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S28.1XXA in its code family, with their registry titles.

View all codes in the S28 family