2021 ICD-10-CM Code T23.4

Corrosion of unspecified degree of wrist and hand

Version 2021
Non-Billable Code
Unspecified Code

Not Valid for Submission

T23.4 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of corrosion of unspecified degree of wrist and hand. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Unspecified diagnosis codes like T23.4 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

ICD-10:T23.4
Short Description:Corrosion of unspecified degree of wrist and hand
Long Description:Corrosion of unspecified degree of wrist and hand

Code Classification

Specific Coding for Corrosion of unspecified degree of wrist and hand

Header codes like T23.4 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for corrosion of unspecified degree of wrist and hand:

  • T23.40 - Corrosion of unspecified degree of hand, unspecified site
  • T23.401 - Corrosion of unspecified degree of right hand, unspecified site
  • T23.401A - Corrosion of unspecified degree of right hand, unspecified site, initial encounter
  • T23.401D - Corrosion of unspecified degree of right hand, unspecified site, subsequent encounter
  • T23.401S - Corrosion of unspecified degree of right hand, unspecified site, sequela
  • T23.402 - Corrosion of unspecified degree of left hand, unspecified site
  • T23.402A - Corrosion of unspecified degree of left hand, unspecified site, initial encounter
  • T23.402D - Corrosion of unspecified degree of left hand, unspecified site, subsequent encounter
  • T23.402S - Corrosion of unspecified degree of left hand, unspecified site, sequela
  • T23.409 - Corrosion of unspecified degree of unspecified hand, unspecified site
  • T23.409A - Corrosion of unspecified degree of unspecified hand, unspecified site, initial encounter
  • T23.409D - Corrosion of unspecified degree of unspecified hand, unspecified site, subsequent encounter
  • T23.409S - Corrosion of unspecified degree of unspecified hand, unspecified site, sequela
  • T23.41 - Corrosion of unspecified degree of thumb (nail)
  • T23.411 - Corrosion of unspecified degree of right thumb (nail)
  • T23.411A - Corrosion of unspecified degree of right thumb (nail), initial encounter
  • T23.411D - Corrosion of unspecified degree of right thumb (nail), subsequent encounter
  • T23.411S - Corrosion of unspecified degree of right thumb (nail), sequela
  • T23.412 - Corrosion of unspecified degree of left thumb (nail)
  • T23.412A - Corrosion of unspecified degree of left thumb (nail), initial encounter
  • T23.412D - Corrosion of unspecified degree of left thumb (nail), subsequent encounter
  • T23.412S - Corrosion of unspecified degree of left thumb (nail), sequela
  • T23.419 - Corrosion of unspecified degree of unspecified thumb (nail)
  • T23.419A - Corrosion of unspecified degree of unspecified thumb (nail), initial encounter
  • T23.419D - Corrosion of unspecified degree of unspecified thumb (nail), subsequent encounter
  • T23.419S - Corrosion of unspecified degree of unspecified thumb (nail), sequela
  • T23.42 - Corrosion of unspecified degree of single finger (nail) except thumb
  • T23.421 - Corrosion of unspecified degree of single right finger (nail) except thumb
  • T23.421A - Corrosion of unspecified degree of single right finger (nail) except thumb, initial encounter
  • T23.421D - Corrosion of unspecified degree of single right finger (nail) except thumb, subsequent encounter
  • T23.421S - Corrosion of unspecified degree of single right finger (nail) except thumb, sequela
  • T23.422 - Corrosion of unspecified degree of single left finger (nail) except thumb
  • T23.422A - Corrosion of unspecified degree of single left finger (nail) except thumb, initial encounter
  • T23.422D - Corrosion of unspecified degree of single left finger (nail) except thumb, subsequent encounter
  • T23.422S - Corrosion of unspecified degree of single left finger (nail) except thumb, sequela
  • T23.429 - Corrosion of unspecified degree of unspecified single finger (nail) except thumb
  • T23.429A - Corrosion of unspecified degree of unspecified single finger (nail) except thumb, initial encounter
  • T23.429D - Corrosion of unspecified degree of unspecified single finger (nail) except thumb, subsequent encounter
  • T23.429S - Corrosion of unspecified degree of unspecified single finger (nail) except thumb, sequela
  • T23.43 - Corrosion of unspecified degree of multiple fingers (nail), not including thumb
  • T23.431 - Corrosion of unspecified degree of multiple right fingers (nail), not including thumb
  • T23.431A - Corrosion of unspecified degree of multiple right fingers (nail), not including thumb, initial encounter
  • T23.431D - Corrosion of unspecified degree of multiple right fingers (nail), not including thumb, subsequent encounter
  • T23.431S - Corrosion of unspecified degree of multiple right fingers (nail), not including thumb, sequela
  • T23.432 - Corrosion of unspecified degree of multiple left fingers (nail), not including thumb
  • T23.432A - Corrosion of unspecified degree of multiple left fingers (nail), not including thumb, initial encounter
  • T23.432D - Corrosion of unspecified degree of multiple left fingers (nail), not including thumb, subsequent encounter
  • T23.432S - Corrosion of unspecified degree of multiple left fingers (nail), not including thumb, sequela
  • T23.439 - Corrosion of unspecified degree of unspecified multiple fingers (nail), not including thumb
  • T23.439A - Corrosion of unspecified degree of unspecified multiple fingers (nail), not including thumb, initial encounter
  • T23.439D - Corrosion of unspecified degree of unspecified multiple fingers (nail), not including thumb, subsequent encounter
  • T23.439S - Corrosion of unspecified degree of unspecified multiple fingers (nail), not including thumb, sequela
  • T23.44 - Corrosion of unspecified degree of multiple fingers (nail), including thumb
  • T23.441 - Corrosion of unspecified degree of multiple right fingers (nail), including thumb
  • T23.441A - Corrosion of unspecified degree of multiple right fingers (nail), including thumb, initial encounter
  • T23.441D - Corrosion of unspecified degree of multiple right fingers (nail), including thumb, subsequent encounter
  • T23.441S - Corrosion of unspecified degree of multiple right fingers (nail), including thumb, sequela
  • T23.442 - Corrosion of unspecified degree of multiple left fingers (nail), including thumb
  • T23.442A - Corrosion of unspecified degree of multiple left fingers (nail), including thumb, initial encounter
  • T23.442D - Corrosion of unspecified degree of multiple left fingers (nail), including thumb, subsequent encounter
  • T23.442S - Corrosion of unspecified degree of multiple left fingers (nail), including thumb, sequela
  • T23.449 - Corrosion of unspecified degree of unspecified multiple fingers (nail), including thumb
  • T23.449A - Corrosion of unspecified degree of unspecified multiple fingers (nail), including thumb, initial encounter
  • T23.449D - Corrosion of unspecified degree of unspecified multiple fingers (nail), including thumb, subsequent encounter
  • T23.449S - Corrosion of unspecified degree of unspecified multiple fingers (nail), including thumb, sequela
  • T23.45 - Corrosion of unspecified degree of palm
  • T23.451 - Corrosion of unspecified degree of right palm
  • T23.451A - Corrosion of unspecified degree of right palm, initial encounter
  • T23.451D - Corrosion of unspecified degree of right palm, subsequent encounter
  • T23.451S - Corrosion of unspecified degree of right palm, sequela
  • T23.452 - Corrosion of unspecified degree of left palm
  • T23.452A - Corrosion of unspecified degree of left palm, initial encounter
  • T23.452D - Corrosion of unspecified degree of left palm, subsequent encounter
  • T23.452S - Corrosion of unspecified degree of left palm, sequela
  • T23.459 - Corrosion of unspecified degree of unspecified palm
  • T23.459A - Corrosion of unspecified degree of unspecified palm, initial encounter
  • T23.459D - Corrosion of unspecified degree of unspecified palm, subsequent encounter
  • T23.459S - Corrosion of unspecified degree of unspecified palm, sequela
  • T23.46 - Corrosion of unspecified degree of back of hand
  • T23.461 - Corrosion of unspecified degree of back of right hand
  • T23.461A - Corrosion of unspecified degree of back of right hand, initial encounter
  • T23.461D - Corrosion of unspecified degree of back of right hand, subsequent encounter
  • T23.461S - Corrosion of unspecified degree of back of right hand, sequela
  • T23.462 - Corrosion of unspecified degree of back of left hand
  • T23.462A - Corrosion of unspecified degree of back of left hand, initial encounter
  • T23.462D - Corrosion of unspecified degree of back of left hand, subsequent encounter
  • T23.462S - Corrosion of unspecified degree of back of left hand, sequela
  • T23.469 - Corrosion of unspecified degree of back of unspecified hand
  • T23.469A - Corrosion of unspecified degree of back of unspecified hand, initial encounter
  • T23.469D - Corrosion of unspecified degree of back of unspecified hand, subsequent encounter
  • T23.469S - Corrosion of unspecified degree of back of unspecified hand, sequela
  • T23.47 - Corrosion of unspecified degree of wrist
  • T23.471 - Corrosion of unspecified degree of right wrist
  • T23.471A - Corrosion of unspecified degree of right wrist, initial encounter
  • T23.471D - Corrosion of unspecified degree of right wrist, subsequent encounter
  • T23.471S - Corrosion of unspecified degree of right wrist, sequela
  • T23.472 - Corrosion of unspecified degree of left wrist
  • T23.472A - Corrosion of unspecified degree of left wrist, initial encounter
  • T23.472D - Corrosion of unspecified degree of left wrist, subsequent encounter
  • T23.472S - Corrosion of unspecified degree of left wrist, sequela
  • T23.479 - Corrosion of unspecified degree of unspecified wrist
  • T23.479A - Corrosion of unspecified degree of unspecified wrist, initial encounter
  • T23.479D - Corrosion of unspecified degree of unspecified wrist, subsequent encounter
  • T23.479S - Corrosion of unspecified degree of unspecified wrist, sequela
  • T23.49 - Corrosion of unspecified degree of multiple sites of wrist and hand
  • T23.491 - Corrosion of unspecified degree of multiple sites of right wrist and hand
  • T23.491A - Corrosion of unspecified degree of multiple sites of right wrist and hand, initial encounter
  • T23.491D - Corrosion of unspecified degree of multiple sites of right wrist and hand, subsequent encounter
  • T23.491S - Corrosion of unspecified degree of multiple sites of right wrist and hand, sequela
  • T23.492 - Corrosion of unspecified degree of multiple sites of left wrist and hand
  • T23.492A - Corrosion of unspecified degree of multiple sites of left wrist and hand, initial encounter
  • T23.492D - Corrosion of unspecified degree of multiple sites of left wrist and hand, subsequent encounter
  • T23.492S - Corrosion of unspecified degree of multiple sites of left wrist and hand, sequela
  • T23.499 - Corrosion of unspecified degree of multiple sites of unspecified wrist and hand
  • T23.499A - Corrosion of unspecified degree of multiple sites of unspecified wrist and hand, initial encounter
  • T23.499D - Corrosion of unspecified degree of multiple sites of unspecified wrist and hand, subsequent encounter
  • T23.499S - Corrosion of unspecified degree of multiple sites of unspecified wrist and hand, sequela

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code T23.4:


Code First

Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

Use Additional Code

Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

Information for Patients


Burns

A burn is damage to your body's tissues caused by heat, chemicals, electricity, sunlight, or radiation. Scalds from hot liquids and steam, building fires and flammable liquids and gases are the most common causes of burns. Another kind is an inhalation injury, caused by breathing smoke.

There are three types of burns:

Burns can cause swelling, blistering, scarring and, in serious cases, shock, and even death. They also can lead to infections because they damage your skin's protective barrier. Treatment for burns depends on the cause of the burn, how deep it is, and how much of the body it covers. Antibiotic creams can prevent or treat infections. For more serious burns, treatment may be needed to clean the wound, replace the skin, and make sure the patient has enough fluids and nutrition.

NIH: National Institute of General Medical Sciences


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Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)