2026 ICD-10-CM Diagnosis Code S02.610BFracture of condylar process of mandible, unspecified side, initial encounter for open fracture

ICD-10-CM Codes›S00–T88›S00-S09›S02

ICD-10-CM S02.610B
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S02.610B is a billable ICD-10-CM diagnosis code for fracture of condylar process of mandible, unspecified side, initial encounter for open fracture. The 7th character B reports the initial encounter for an open fracture. 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, 963 through 965. The code is flagged as an unspecified code, since codes identifying laterality exist in the same family. Coders also document this condition as closed fracture of mandible, condylar process. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury; and Fracture of head and neck, initial encounter.

Code Identity

ICD-10-CM Code
S02.610B
Billable Status
Yes — Valid for Submission
Code Describes
Fracture of condylar process of mandible, unspecified side, initial encounter for open fracture
Short Description
Fx condylar process of mandible, unspecified side, 7thB
Parent Code
S02.610
Fracture of condylar process of mandible, unspecified side

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS00-S09Injuries to the head
CategoryS02Fracture of skull and facial bones
This CodeS02.610BFracture of condylar process of mandible, unspecified side, initial encounter for open fracture

Code EditsBilling

Medicare Code Editor checks that affect claim validity for S02.610B.

Unspecified codes
Unspecified codes exist in the ICD-10-CM classification for circumstances when documentation in the medical record does not provide the level of detail needed to support reporting a more specific code. However, in the inpatient setting, there should generally be very limited and rare circumstances for which the laterality (right, left, bilateral) of a condition is unable to be documented and reported. The following pages contain the list of unspecified ICD-10-CM diagnosis codes for which there is a more specific code to identify laterality (right, left, bilateral) within that code family.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Closed fracture of mandible, condylar process
  • Fracture of condylar process of mandible
  • Open fracture of mandible, condylar process
  • Open fracture of ramus of mandible

Coding GuidelinesGuidance

The principles of multiple coding of injuries should be followed in coding fractures. Fractures of specified sites are coded individually by site, to the level of detail furnished by medical record content.

A fracture not indicated as open or closed should be coded to closed. A fracture not indicated whether displaced or not displaced should be coded to displaced.

Initial vs. Subsequent Encounter for Fractures

Traumatic fractures are coded using the appropriate 7th character for initial encounter (A, B, C) while the patient is receiving active treatment for the fracture. The appropriate 7th character for initial encounter should also be assigned for a patient who delayed seeking treatment for the fracture or nonunion.

Fractures are coded using the appropriate 7th character for subsequent care for encounters after the patient has completed active treatment of the fracture and is receiving routine care for the fracture during the healing or recovery phase.

Care for complications of surgical treatment for fracture repairs during the healing or recovery phase should be coded with the appropriate complication codes.

Care of complications of fractures, such as malunion and nonunion, should be reported with the appropriate 7th character for subsequent care with nonunion (K, M, N) or subsequent care with malunion (P, Q, R).

The open fracture designations in the assignment of the 7th character for fractures of the forearm, femur and lower leg, including ankle are based on the Gustilo open fracture classification. When the Gustilo classification type is not specified for an open fracture, the 7th character for open fracture type I or II should be assigned (B, E, H, M, Q).

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DEN001
Any dental condition including traumatic injury
Default principal diagnosis: inpatient No · outpatient No
CCSR INJ001
Fracture of head and neck, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Fractures

A fracture is a break in a bone. Fractures are usually caused by injuries. Since they can sometimes be serious, it's important to get medical care right away if you think you have a fracture.

The full article covers:

  • What is a fracture?
  • What are the different types of fractures?
  • What causes fractures?
  • What are the symptoms of a fracture?
  • How are fractures diagnosed?
  • What are the treatments for fractures?
  • Can fractures be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S02.610B to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
802.31 Fx condyl proc mand-open
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement S02.610B replaces the following previously assigned code(s):

  • S02.61XB - Fracture of condylar process of mandible, init for opn fx
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S02.610BOverview

Is S02.610B (Fracture of condylar process of mandible, unspecified side) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report fracture of condylar process of mandible, unspecified side, initial encounter for open fracture on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character B in S02.610B mean?

The final character B reports the initial encounter for an open fracture, in this case involving the fracture of condylar process of mandible, unspecified side.

What MS-DRG does S02.610B group to?

When fracture of condylar process of mandible, unspecified side, initial encounter for open fracture is the principal diagnosis on an inpatient stay, it groups to MS-DRG 157, 158, 159, 963, 964, 965, with relative weights from 0.7085 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S02.610B?

Under the General Equivalence Mappings, fracture of condylar process of mandible, unspecified side, initial encounter for open fracture converts to ICD-9-CM 802.31 (fx condyl proc mand-open). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.