ICD-10-CM Diagnosis Code D37.5 - Neoplasm of uncertain behavior of rectum (original) (raw)

ICD List 2025-2026 Edition

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2. ICD-10-CM Codes
3. C00–D49
4. D37-D48
5. D37
6. 2026 ICD-10-CM Code D37.5

Neoplasm of uncertain behavior of rectum

ICD-10-CM Code:

D37.5

ICD-10 Code for:

Neoplasm of uncertain behavior of rectum

Is Billable?

Yes - Valid for Submission

Chronic Condition Indicator: [1]

Not chronic

Code Navigator:

D37.5 is a billable diagnosis code used to specify a medical diagnosis of neoplasm of uncertain behavior of rectum. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.

The following anatomical sites found in the Table of Neoplasms reference this diagnosis code given the correct histological behavior: Neoplasm, neoplastic colon [See Also: Neoplasm, intestine, large] with rectum ; Neoplasm, neoplastic intestine, intestinal large colon and rectum ; Neoplasm, neoplastic junction pelvirectal ; Neoplasm, neoplastic junction rectosigmoid ; Neoplasm, neoplastic pelvirectal junction ; Neoplasm, neoplastic rectosigmoid (junction) ; Neoplasm, neoplastic rectum (ampulla) ; etc

1. Code Information
2. Approximate Synonyms
3. Clinical Classification
4. Tabular List of Diseases and Injuries
5. Diagnostic Related Groups Mapping
6. Convert to ICD-9 Code
7. Table of Neoplasms
8. Patient Education
9. Other Codes Used Similar Conditions
10. Code History

• Neoplasms
  C00–D49
  • Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
    D37-D48
    * Neoplasm of uncertain behavior of oral cavity and digestive organs
    D37

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

• Neoplasm of uncertain behavior of colon
• Neoplasm of uncertain behavior of rectosigmoid junction
• Neoplasm of uncertain behavior of rectum
• Neoplasm of uncertain behavior of sigmoid colon

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

CCSR Code: NEO072

Inpatient Default: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

ICD-9-CM: 235.2

Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option, but it may not fully capture the original diagnosis or clinical intent.

This code is referenced in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.

Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.

Filter table of neoplasms:

Rectal Disorders

The rectum is the lower part of your large intestine where your body stores stool. Problems with the rectum are common. They include hemorrhoids, abscesses, incontinence and cancer.

Many people are embarrassed to talk about rectal troubles. But seeing your doctor about problems in this area is important. This is especially true if you have pain or bleeding. Treatments vary depending on the particular problem.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

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• FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026

• FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025

• FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024

• FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023

• FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022

• 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.

• Previous Code: D37.4

• Parent Code: D37

• Next Code: D37.6