2026 ICD-10-CM Diagnosis Code S02.631K

Approximate Synonyms

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

Clinical Classification

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

Coding Guidelines

The principles of multiple coding of injuries should be followed in coding fractures. Fractures of specified sites are coded individually by site nd 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) for each encounter where 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).

Malunion/nonunion: The appropriate 7th character for initial encounter should also be assigned for a patient who delayed seeking treatment for the fracture or nonunion.

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).

MS-DRG Mapping for ICD-10-CM Code S02.631K

Diagnosis-Related Groups (DRGs) are used to classify hospital cases for billing and healthcare management. They help standardize how hospitals and other providers are reimbursed for inpatient care. Patients are grouped based on their principal diagnosis into broader categories called Major Diagnostic Categories (MDCs).

Once assigned to a DRG, the hospital receives a set payment for the patient’s care, regardless of the actual services provided. This fixed rate is intended to cover the typical cost of treating patients within that group. The payment amount depends on the DRG's relative weight, which reflects the expected complexity and cost of care based on the severity of the patient’s condition.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V43.0 applicable from 10/01/2025 through 09/30/2026.

Present on Admission (POA)

S02.631K is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions

Replacement Code

S02631K replaces the following previously assigned ICD-10-CM code(s):

• S02.63XK - Fx coronoid process of mandible, subs for fx w nonunion

Convert S02.631K to ICD-9-CM

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

Patient Education

Fractures

What is a fracture?

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.

What are the different types of fractures?

There are different ways to describe fractures. For example, there are different types of fractures based on:

• Whether the bone is partially or completely broken.
• Whether the bone breaks through the skin; if it does, it's called an open (or compound) fracture. If not, it's a closed fracture.
• The direction or shape of the break, for example if it's in a line across the bone or if it has some kind of pattern.
• The cause of the break. For example, a stress fracture is a small break in a bone that is often caused by overuse.
• Which bone is broken, for example facial fractures include nose and jaw fractures.

What causes fractures?

Fractures commonly happen because of car accidents, falls, or sports injuries. Overuse and repetitive motions can also cause fractures.

Low bone density and osteoporosis are conditions which cause weakening of your bones. Having one of these conditions makes you much more likely to break a bone.

What are the symptoms of a fracture?

The symptoms of a fracture can vary, depending on which bone you broke. But they may include:

• Intense pain
• Deformity, for example a limb that looks out of place
• Swelling, bruising, or tenderness around the injury
• Trouble moving the injured part

If you think that you may have broken a bone, get medical care right away.

How are fractures diagnosed?

To find out if you have a fracture, your health provider will do a physical exam and ask about your injury. They will also likely order an x-ray or other imaging test to see if your bone is broken.

What are the treatments for fractures?

The most common treatment for a fracture is for you to wear a cast or a splint. This will keep your bone from moving while it heals. How long you need to wear it will depend on the type of fracture and which bone is affected. But it's often for several weeks. Your provider will let you know when you can get it off.

In some cases, you may need surgery to put in plates, pins, or screws to keep the bone in place.

Can fractures be prevented?

There are steps you can take to lower your risk of fractures:

• Keeping your bones strong by:
  • Getting enough calcium and vitamin D in your diet
  • Getting regular physical activity, including weight bearing exercises such as walking, tennis, and dancing
  • Getting treatment for low bone density or osteoporosis (if needed)
• Wearing protective equipment when you do sports
• Preventing falls by:
  • Getting rid of any tripping hazards in your home
  • Being careful when walking on wet or icy surfaces
  • Choosing the right footwear

Jaw Injuries and Disorders

Your jaw is a set of bones that holds your teeth. It includes:

• The maxilla, which is the upper part of your jaw. It holds your top teeth in place and doesn't move. It also supports the muscles involved in chewing and facial expressions.
• The mandible, which is the lower part of your jaw. You move it when you talk or chew. It also holds your lower teeth in place.
• The temporomandibular joints (TMJs), which are two joints (one on each side) that connect your mandible to your skull.

Jaw problems can include:

• Fractures (broken bones).
• Dislocations, which are joint injuries that force the ends of your bones out of position.
• Temporomandibular disorders (TMDs), which are conditions that affect your TMJs.
• Osteonecrosis, which happens when the blood flow to part of your bone is disrupted. It can cause the bone to break down.
• Jaw tumors, which can be benign (not cancer) or cancer.
• Jaw defects, which are birth defects in which your jaw could be missing or deformed.

Diagnostic imaging tests are often used to diagnose jaw injuries and disorders. Your treatment will depend on which jaw problem you have.

Code History

• FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
• FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
• FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
• FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
• FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
• 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