2021 ICD-10-CM Diagnosis Code S20.121A

Blister (nonthermal) of breast, right breast, initial encounter

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • S20.121A is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Blister (nonthermal) of breast, right breast, init encntr
  • The 2021 edition of ICD-10-CM S20.121A became effective on October 1, 2020.
  • This is the American ICD-10-CM version of S20.121A - other international versions of ICD-10 S20.121A may differ.
The following code(s) above S20.121A contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to S20.121A:
  • S00-T88
    2021 ICD-10-CM Range S00-T88

    Injury, poisoning and certain other consequences of external causes

    • 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
    Type 1 Excludes
    Use Additional
    • code to identify any retained foreign body, if applicable (Z18.-)
    Injury, poisoning and certain other consequences of external causes
  • S20-S29
    2021 ICD-10-CM Range S20-S29

    Injuries to the thorax

    • injuries of breast
    • injuries of chest (wall)
    • injuries of interscapular area
    Type 2 Excludes
    • 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)
    Injuries to the thorax
Approximate Synonyms
  • Right breast blister
  • Right breast blister with infection
ICD-10-CM S20.121A is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 606 Minor skin disorders with mcc
  • 607 Minor skin disorders without mcc
  • 963 Other multiple significant trauma with mcc
  • 964 Other multiple significant trauma with cc
  • 965 Other multiple significant trauma without cc/mcc

Convert S20.121A to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To S20.121A
S20.112 Abrasion of breast, left breast
S20.112A …… initial encounter
S20.112D …… subsequent encounter
S20.112S …… sequela
S20.119 Abrasion of breast, unspecified breast
S20.119A …… initial encounter
S20.119D …… subsequent encounter
S20.119S …… sequela
S20.12 Blister (nonthermal) of breast
S20.121 Blister (nonthermal) of breast, right breast
S20.121A …… initial encounter
S20.121D …… subsequent encounter
S20.121S …… sequela
S20.122 Blister (nonthermal) of breast, left breast
S20.122A …… initial encounter
S20.122D …… subsequent encounter
S20.122S …… sequela
S20.129 Blister (nonthermal) of breast, unspecified breast
S20.129A …… initial encounter
S20.129D …… subsequent encounter
S20.129S …… sequela

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.