2026 ICD-10-CM Diagnosis Code K03.4Hypercementosis
ICD-10-CM Codes›K00–K95›K00-K14›K03
- Billable — Valid for Submission
- Chronic Condition
K03.4 is a billable ICD-10-CM diagnosis code for hypercementosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 157 through 159. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury, Disorders of teeth and gingiva, and Nontraumatic dental conditions.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Hypercementosis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Cementation hyperplasia
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Cementosis - K03.4
- Hypercementosis - K03.4
- cementation (tooth) (teeth) - K03.4
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Cementosis
- Hypercementosis
- Hyperplasia, hyperplastic
- cementation (tooth) (teeth)
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Hypercementosis
a regressive change of teeth characterized by excessive development of secondary cementum on the tooth surface. it may occur on any part of the root, but the apical two-thirds are most commonly affected. (dorland, 27th ed)
Patient EducationClinical
Tooth Disorders
Your teeth are made of a hard, bonelike material. There are four parts:
The full article covers:
- What are teeth?
- What are tooth disorders?
- What causes tooth disorders?
- What are the symptoms of tooth disorders?
- How are tooth disorders diagnosed?
- What are the treatments for tooth disorders?
- Can tooth disorders be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K03.4 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K03.4Overview
Is K03.4 (Other diseases of hard tissues of teeth) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report hypercementosis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does K03.4 group to?
When hypercementosis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 157, 158, 159, with relative weights from 0.7085 to 1.7168 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of K03.4?
Under the General Equivalence Mappings, hypercementosis converts to ICD-9-CM 521.5 (hypercementosis). The mapping is a direct match.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
