2026 ICD-10-CM Diagnosis Code M79.89Other specified soft tissue disorders
ICD-10-CM Codes›M00–M99›M70-M79›M79
- Billable — Valid for Submission
- Not Chronic
M79.89 is a billable ICD-10-CM diagnosis code for other specified soft tissue disorders. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 555 through 556. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified connective tissue disease.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Cheiromegaly
- Disorder of fascia
- Disorder of oral soft tissues
- Disorder of rectus sheath
- Distribution of body fat loss - finding
- Fat necrosis
- Fat necrosis of subcutaneous tissue
- Finger joint - soft tissue swelling
- Foot joint swelling
- Infection of soft tissue of cervical spine
- Injury of soft tissue
- Leg swelling symptom
- Loss of body fat unevenly distributed
- Necrosis of subcutaneous tissue
- Necrotizing soft tissue infection
- Nodular fat necrosis
- Oral frictional keratosis
- Polyalgia
- Reactive fibrous tissue proliferation
- Soft tissue crepitus
- Soft tissue impingement on teeth
- Soft tissue swelling
- Soft tissue texture changes
- Swelling of bilateral feet
- Swelling of bilateral lower limbs
- Swelling of finger
- Swelling of finger joint
- Swelling of left foot
- Swelling of left lower limb
- Swelling of limb
- Swelling of lower limb
- Swelling of right foot
- Swelling of right lower limb
- Swelling of thumb joint
- Swelling of toe joint
- Swelling of toe of bilateral feet
- Swelling of toe of left foot
- Swelling of toe of right foot
- Swollen thumb
- Thumb joint - soft tissue swelling
- Tissue bogginess
- Tissue texture abnormality
- Toe joint - soft tissue swelling
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Polyalgia
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.
- Cheiromegaly - M79.89
- Disorder (of) - See Also: Disease;
- soft tissue - M79.9
- specified type NEC - M79.89
- Polyalgia - M79.89
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Cheiromegaly
- Disorder(of)
- soft tissue
- specified type NEC
- Polyalgia
- Swelling(of)
- arm
- Swelling(of)
- arm
- forearm
- Swelling(of)
- finger
- Swelling(of)
- foot
- Swelling(of)
- hand
- Swelling(of)
- leg
- Swelling(of)
- leg
- lower
- Swelling(of)
- toe
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Fat Necrosis
a condition in which the death of adipose tissue results in neutral fats being split into fatty acids and glycerol.Pancreatitis
inflammation of the pancreas. pancreatitis is classified as acute unless there are computed tomographic or endoscopic retrograde cholangiopancreatographic findings of chronic pancreatitis (international symposium on acute pancreatitis, atlanta, 1992). the two most common forms of acute pancreatitis are alcoholic pancreatitis and gallstone pancreatitis.
Patient EducationClinical
Connective Tissue Disorders
Your connective tissue supports many different parts of your body, such as your skin, eyes, and heart. It is like a "cellular glue" that gives your body parts their shape and helps keep them strong. It also helps some of your tissues do their work. It is made of many kinds of proteins. Cartilage and fat are types of connective tissue.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M79.89 to ICD-9-CMHistory
Code HistoryHistory
Questions About M79.89Overview
Is M79.89 (Other specified soft tissue disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified soft tissue disorders on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M79.89 group to?
When other specified soft tissue disorders is the principal diagnosis on an inpatient stay, it groups to MS-DRG 555, 556, with relative weights from 0.8306 to 1.3218 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of M79.89?
Under the General Equivalence Mappings, other specified soft tissue disorders converts to ICD-9-CM 729.81 (swelling of limb) and 729.99 (soft tissue disorder NEC). 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.
