2027 ICD-10-CM Diagnosis Code D09.8Carcinoma in situ of other specified sites
ICD-10-CM Codes›C00–D49›D00-D09›D09
- Billable — Valid for Submission
- Chronic Condition
D09.8 is a billable ICD-10-CM diagnosis code for carcinoma in situ of other specified sites. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 826 through 830, 843 through 845. Coders also document this condition as carcinoma in situ of ear, nose and throat. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cancer of other sites.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Carcinoma in situ of ear, nose and throat
- Carcinoma in situ of respiratory and intrathoracic organ
- Primary squamous cell carcinoma of chest wall
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D09.8: its own notes plus those printed at D09, 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 D09.8, its category, or a range that includes it.
Applicable To 1
These notes mention D09.8.
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
Cancer
Cancer is not just one disease but many diseases. Cancer begins in your cells, which are the building blocks of your body. Usually, your body forms new cells as needed, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should.
The full article covers:
- What is cancer?
- What are the types of cancer?
- How does cancer develop?
- What are the symptoms of cancer?
- How is cancer diagnosed?
- What are the treatments for cancer?
- Can cancer be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D09.8 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D09.8Overview
What is the ICD-10 code for carcinoma in situ of other specified sites?
The ICD-10-CM code for carcinoma in situ of other specified sites is D09.8 (sometimes written as D098). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is D09.8 (Carcinoma in situ of other and unspecified sites) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report carcinoma in situ of other specified sites on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does D09.8 group to?
When carcinoma in situ of other specified sites is the principal diagnosis on an inpatient stay, it groups to MS-DRG 844, 827, 829, 843, 828, 826, 830, 845, with relative weights from 0.8443 to 4.7560 depending on complications. Higher weights mean higher Medicare reimbursement.
Can D09.8 be reported with a code from D03?
Not as a rule. The Excludes1 note at D09, which applies to D09.8, 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).
What is the ICD-9 equivalent of D09.8?
Under the General Equivalence Mappings, carcinoma in situ of other specified sites converts to ICD-9-CM 234.8 (ca in situ NEC). The mapping is approximate, so confirm the match fits the documentation.
