2027 ICD-10-CM Diagnosis Code S20.01XAContusion of right breast, initial encounter

ICD-10-CM Codes›S00–T88›S20-S29›S20

ICD-10-CM S20.01XA
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S20.01XA is a billable ICD-10-CM diagnosis code for contusion of right breast, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 604 through 605, 963 through 965. Coders also document this condition as breast hematoma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Superficial injury; contusion, initial encounter.

Code Identity

ICD-10-CM Code
S20.01XA
Billable Status
Yes — Valid for Submission
Code Describes
Contusion of right breast, initial encounter
Short Description
Contusion of right breast, initial encounter
Same as the full description in the CMS dataset.
Parent Code
S20.01
Contusion of right breast

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS20-S29Injuries to the thorax
CategoryS20Superficial injury of thorax
This CodeS20.01XAContusion of right breast, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Breast hematoma
  • Contusion of breast
  • Contusion of right breast
  • Hematoma of right breast
  • Traumatic hematoma of breast
  • Traumatic hematoma of right breast

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Superficial injury of thorax (S20). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to S20.01XA: its own notes plus those printed at S20, block S20-S29, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block S20-S29 Injuries to the thorax applies to 1,602 codes
  • injuries of breast
  • injuries of chest (wall)
  • injuries of interscapular area

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block S20-S29 Injuries to the thorax applies to 1,602 codes
  • burns and corrosions (T20-T32)
  • effects of foreign body in bronchus (T17.5)
  • effects of foreign body in esophagus (T18.1)
  • effects of foreign body in lung (T17.8)
  • effects of foreign body in trachea (T17.4)
  • frostbite (T33-T34)
  • injuries of axilla
  • injuries of clavicle
  • injuries of scapular region
  • injuries of shoulder
  • insect bite or sting, venomous (T63.4)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From S20 Superficial injury of thorax applies to 294 codes
  • The appropriate 7th character is to be added to each code from category S20
Values for category S20 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter this code
  • Dsubsequent encounter
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ017
Superficial injury; contusion, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Bruises

A bruise is a mark on your skin caused by blood trapped under the surface. It happens when an injury crushes small blood vessels but does not break the skin. Those vessels break open and leak blood under the skin.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S20.01XA to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
922.0 Contusion of breast
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S20.01XAOverview

What is the ICD-10 code for contusion of right breast, initial encounter?

The ICD-10-CM code for contusion of right breast, initial encounter is S20.01XA (sometimes written as S2001XA). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is S20.01XA (Contusion of right breast) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report contusion of right breast, initial encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character A in S20.01XA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for contusion of right breast, such as an emergency visit or first evaluation.

What MS-DRG does S20.01XA group to?

When contusion of right breast, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 605, 964, 965, 604, 963, with relative weights from 0.9075 to 2.6361 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S20.01XA?

Under the General Equivalence Mappings, contusion of right breast, initial encounter converts to ICD-9-CM 922.0 (contusion of breast). The mapping is approximate, so confirm the match fits the documentation.