2021 ICD-10-CM Code D49.9

Neoplasm of unspecified behavior of unspecified site

  1. ICD-10-CM Index
  2. Chapter: D50–D89
  3. Section: D49
  4. Block: D49
  5. D49.9 - Neoplasm of unspecified behavior of unspecified site
Version 2021
Billable Code
Unspecified Code
MS-DRG Mapping
Neoplasm Unspecified Behavior

Valid for Submission

D49.9 is a billable diagnosis code used to specify a medical diagnosis of neoplasm of unspecified behavior of unspecified site. The code D49.9 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.

The ICD-10-CM code D49.9 might also be used to specify conditions or terms like ampulla of vater surgical margin, involved by tumor, ampulla of vater surgical margin, involved by tumor, ampulla of vater, distal pancreatic surgical margin, involved by tumor, ampulla of vater, posterior retroperitoneal pancreatic surface surgical margin, involved by tumor, anal, deep radial surgical margin not involved by tumor , anal, distal surgical margin not involved by tumor, etc.

The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: Neoplasm, neoplastic unknown site or unspecified .

Unspecified diagnosis codes like D49.9 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:D49.9
Short Description:Neoplasm of unspecified behavior of unspecified site
Long Description:Neoplasm of unspecified behavior of unspecified site

Code Classification

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code D49.9 are found in the index:

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Convert D49.9 to ICD-9 Code

Table of Neoplasms

The code D49.9 is included 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.

Neoplasm, neoplastic Malignant
Primary		 Malignant
Secondary		 CaInSitu Benign Uncertain
Behavior		 Unspecified
Behavior
»Neoplasm, neoplastic
  »unknown site or unspecified
C80.1C79.9D09.9D36.9D48.9D49.9

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)

Previous Code: D49.89

Related Codes

Next Code: D50