2027 ICD-10-CM Diagnosis Code D02.4Carcinoma in situ of respiratory system, unspecified
ICD-10-CM Codes›C00–D49›D00-D09›D02
- Billable — Valid for Submission
- Chronic Condition
D02.4 is a billable ICD-10-CM diagnosis code for carcinoma in situ of respiratory system, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 180 through 182. Coders also document this condition as carcinoma in situ of respiratory and intrathoracic organ. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Respiratory cancers.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Carcinoma in situ of respiratory and intrathoracic organ
- Carcinoma in situ of respiratory system
- Carcinoma in situ of respiratory tract
- Carcinoma in situ of upper respiratory tract
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D02.4: its own notes plus those printed at D02, block D00-D09, and Chapter 2. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- Bowen's disease
- erythroplasia
- grade III intraepithelial neoplasia
- Queyrat's erythroplasia
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Notes
General instructions on how these codes are used.
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name D02.4, its category, or a range that includes it.
Applicable To 1
These notes mention D02.4.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
Patient EducationClinical
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Read the full article at MedlinePlus
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Convert D02.4 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D02.4Overview
What is the ICD-10 code for carcinoma in situ of respiratory system, unspecified?
The ICD-10-CM code for carcinoma in situ of respiratory system, unspecified is D02.4 (sometimes written as D024). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is D02.4 (Carcinoma in situ of middle ear and respiratory system) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report carcinoma in situ of respiratory system, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does D02.4 group to?
When carcinoma in situ of respiratory system, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 181, 180, 182, with relative weights from 0.7436 to 1.7800 depending on complications. Higher weights mean higher Medicare reimbursement.
Can D02.4 be reported with a code from D03?
Not as a rule. The Excludes1 note at D02, which applies to D02.4, lists "melanoma in situ (D03.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
Does D02.4 need an additional code?
When the condition applies, yes. The Use Additional Code note at D02, which applies to D02.4, reads: code to identify: exposure to environmental tobacco smoke (Z77.22); exposure to tobacco smoke in the perinatal period (P96.81); history of tobacco dependence (Z87.891); occupational exposure to environmental tobacco smoke (Z57.31); tobacco dependence (F17.-); and 1 more listed in the Instructional Notes section. The additional code is reported after D02.4.
