2023

  1. ICD-10-CM Codes
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  2. K00-K95
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  3. K55-K64
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  4. K59-
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  5. 2023 ICD-10-CM Diagnosis Code K59.3

2023 ICD-10-CM Diagnosis Code K59.3

Megacolon, not elsewhere classified

    2016 2017 - Converted to Parent Code 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
  • K59.3 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2023 edition of ICD-10-CM K59.3 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of K59.3 - other international versions of ICD-10 K59.3 may differ.
Applicable To
  • Dilatation of colon
Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, 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. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • , if applicable (T51-T65
    ICD-10-CM Range T51-T65

    Toxic effects of substances chiefly nonmedicinal as to source

    Note
    • When no intent is indicated code to accidental. Undetermined intent is only for use when there is specific documentation in the record that the intent of the toxic effect cannot be determined.
    Type 1 Excludes
    • contact with and (suspected) exposure to toxic substances (Z77.-)
    Use Additional
    • code(s):
    • for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
    • personal history of foreign body fully removed (Z87.821)
    • to identify any retained foreign body, if applicable (Z18.-)
    • T51 Toxic effect of alcohol
    • T52 Toxic effect of organic solvents
    • T53 Toxic effect of halogen derivatives of a...
    • T54 Toxic effect of corrosive substances
    • T55 Toxic effect of soaps and detergents
    • T56 Toxic effect of metals
    • T57 Toxic effect of other inorganic substanc...
    • T58 Toxic effect of carbon monoxide
    • T59 Toxic effect of other gases, fumes and v...
    • T60 Toxic effect of pesticides
    • T61 Toxic effect of noxious substances eaten...
    • T62 Toxic effect of other noxious substances...
    • T63 Toxic effect of contact with venomous an...
    • T64 Toxic effect of aflatoxin and other myco...
    • T65 Toxic effect of other and unspecified su...
    ) to identify toxic agent
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as K59.3. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • congenital megacolon (aganglionic) (
    ICD-10-CM Diagnosis Code Q43.1

    Hirschsprung's disease

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code POA Exempt
    Applicable To
    • Aganglionosis
    • Congenital (aganglionic) megacolon
    Q43.1
    )
  • megacolon (due to) (in) Chagas' disease (
    ICD-10-CM Diagnosis Code B57.32

    Megacolon in Chagas' disease

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    B57.32
    )
  • megacolon (due to) (in) Clostridium difficile (
    ICD-10-CM Diagnosis Code A04.7

    Enterocolitis due to Clostridium difficile

      2016 2017 2018 - Converted to Parent Code 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Applicable To
    • Foodborne intoxication by Clostridium difficile
    • Pseudomembraneous colitis
    A04.7-
    )
  • megacolon (due to) (in) Hirschsprung's disease (
    ICD-10-CM Diagnosis Code Q43.1

    Hirschsprung's disease

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code POA Exempt
    Applicable To
    • Aganglionosis
    • Congenital (aganglionic) megacolon
    Q43.1
    )
The following code(s) above K59.3 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 K59.3:
  • K00-K95
    2023 ICD-10-CM Range K00-K95

    Diseases of the digestive system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the digestive system
  • K59
    ICD-10-CM Diagnosis Code K59

    Other functional intestinal disorders

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • change in bowel habit NOS (R19.4)
    • intestinal malabsorption (K90.-)
    • psychogenic intestinal disorders (F45.8)
    Type 2 Excludes
    • functional disorders of stomach (K31.-)
    Other functional intestinal disorders
Approximate Synonyms
  • Megacolon, not due to hirschsprungs disease
  • Megacolon, not hirschsprung's
Clinical Information
  • An acute form of megacolon, severe pathological dilatation of the colon. It is associated with clinical conditions such as ulcerative colitis; crohn disease; amebic dysentery; or clostridium enterocolitis.
  • Dilatation of the colon, often to alarming dimensions. There are various types of megacolon including congenital megacolon in hirschsprung disease, idiopathic megacolon in constipation, and toxic megacolon.
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): Deleted code
  • 2017 (effective 10/1/2016): New code
  • 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
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
ICD-10-CM Codes Adjacent To K59.3
K59 Other functional intestinal disorders
K59.0 Constipation
K59.00 …… unspecified
K59.01 Slow transit constipation
K59.02 Outlet dysfunction constipation
K59.03 Drug induced constipation
K59.04 Chronic idiopathic constipation
K59.09 Other constipation
K59.1 Functional diarrhea
K59.2 Neurogenic bowel, not elsewhere classified
K59.3 Megacolon, not elsewhere classified
K59.31 Toxic megacolon
K59.39 Other megacolon
K59.4 Anal spasm
K59.8 Other specified functional intestinal disorders
K59.81 Ogilvie syndrome
K59.89 Other specified functional intestinal disorders
K59.9 Functional intestinal disorder, unspecified
K60 Fissure and fistula of anal and rectal regions
K60.0 Acute anal fissure
K60.1 Chronic anal fissure

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

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