1. Home
  2. ICD-10-CM Codes
  3. M00–M99
  4. M86-M90
  5. M86
  6. 2024 ICD-10-CM Code M86.9

2024 ICD-10-CM Diagnosis Code M86.9

Osteomyelitis, unspecified

ICD-10-CM Code:
M86.9
ICD-10 Code for:
Osteomyelitis, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Diseases of the musculoskeletal system and connective tissue
    (M00–M99)
    • Other osteopathies
      (M86-M90)
      • Osteomyelitis
        (M86)

M86.9 is a billable diagnosis code used to specify a medical diagnosis of osteomyelitis, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like M86.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Bacterial osteomyelitis
  • Bacterial osteomyelitis
  • Bacterial osteomyelitis
  • Bone abscess
  • Coccidioidomycosis of bone
  • Cranial cerebrospinal fluid leak
  • Infection associated with internal fixation device
  • Infection associated with internal fixation device
  • Infection by Pasteurella multocida
  • Infection of bone
  • Infection of bone associated with bone fixation device
  • Infection of bone associated with bone fixation device
  • Infection of bone associated with bone plate
  • Infection of bone associated with bone screw
  • Infection of bone of ankle and/or foot
  • Infection of bone of hand
  • Infection of bone of radius and/or ulna
  • Infection of bone of radius and/or ulna
  • Infection of bone of radius and/or ulna
  • Infection of bone of tibia and/or fibula
  • Infection of calcaneum
  • Infection of carpal bone
  • Infection of femur
  • Infection of fibula
  • Infection of humerus
  • Infection of humerus
  • Infection of metacarpal
  • Infection of metatarsal
  • Infection of multiple bones
  • Infection of patella
  • Infection of pelvis
  • Infection of phalanx of finger or thumb
  • Infection of phalanx of toe
  • Infection of radius
  • Infection of scapula
  • Infection of talus
  • Infection of tibia
  • Infection of tibia
  • Infection of tibia
  • Infection of ulna
  • Leak of cranial cerebrospinal fluid due to osteomyelitis
  • Osteitis
  • Osteitis of forearm
  • Osteitis of forearm
  • Osteitis of hand
  • Osteitis of lower leg
  • Osteitis of pelvis
  • Osteitis of shoulder region
  • Osteomyelitis
  • Osteomyelitis due to Staphylococcus aureus
  • Osteomyelitis due to type 1 diabetes mellitus
  • Osteomyelitis of ankle
  • Osteomyelitis of clavicle
  • Osteomyelitis of cranium
  • Osteomyelitis of facial bone
  • Osteomyelitis of femur
  • Osteomyelitis of femur
  • Osteomyelitis of forearm
  • Osteomyelitis of forefoot
  • Osteomyelitis of frontal bone
  • Osteomyelitis of hand
  • Osteomyelitis of hindfoot
  • Osteomyelitis of left ankle
  • Osteomyelitis of left femur
  • Osteomyelitis of left foot
  • Osteomyelitis of left hand
  • Osteomyelitis of left shoulder
  • Osteomyelitis of left tibia
  • Osteomyelitis of lower leg
  • Osteomyelitis of midfoot
  • Osteomyelitis of multiple sites
  • Osteomyelitis of pelvic region
  • Osteomyelitis of right ankle
  • Osteomyelitis of right femur
  • Osteomyelitis of right foot
  • Osteomyelitis of right hand
  • Osteomyelitis of right shoulder
  • Osteomyelitis of right tibia
  • Osteomyelitis of shoulder region
  • Osteomyelitis of shoulder region
  • Osteomyelitis of shoulder region
  • Osteomyelitis of sphenoid bone
  • Osteomyelitis of temporal bone
  • Osteomyelitis of tibia
  • Osteomyelitis of upper arm
  • Osteomyelitis of upper limb
  • Osteomyelitis of zygomatic bone
  • Pasteurella multocida osteomyelitis
  • Pedal osteitis
  • Periostitis
  • Periostitis of forearm
  • Periostitis of forearm without osteomyelitis
  • Periostitis of hand
  • Periostitis of hand without osteomyelitis
  • Periostitis without osteomyelitis
  • Periostitis without osteomyelitis of cervical spine
  • Periostitis without osteomyelitis of coccyx
  • Periostitis without osteomyelitis of lumbar spine
  • Periostitis without osteomyelitis of sacral vertebra
  • Periostitis without osteomyelitis of thoracic spine
  • SAPHO syndrome
  • Sternal osteomyelitis
  • Tenoperiostitis

Clinical Classification

Clinical Information

  • Osteomyelitis

    inflammation of the bone as a result of infection. it may be caused by a variety of infectious agents, especially pyogenic (pus - producing) bacteria.

  • Dry Socket

    a condition sometimes occurring after tooth extraction, particularly after traumatic extraction, resulting in a dry appearance of the exposed bone in the socket, due to disintegration or loss of the blood clot. it is basically a focal osteomyelitis without suppuration and is accompanied by severe pain (alveolalgia) and foul odor. (dorland, 28th ed)

  • Fibrous Dysplasia of Bone

    a disease of bone marked by thinning of the cortex by fibrous tissue containing bony spicules, producing pain, disability, and gradually increasing deformity. only one bone may be involved (fibrous dysplasia, monostotic) or several (fibrous dysplasia, polyostotic).

  • Osteitis

    inflammation of the bone.

  • Osteitis Deformans

    a disease marked by repeated episodes of increased bone resorption followed by excessive attempts at repair, resulting in weakened, deformed bones of increased mass. the resultant architecture of the bone assumes a mosaic pattern in which the fibers take on a haphazard pattern instead of the normal parallel symmetry.

  • Osteitis Fibrosa Cystica

    a fibrous degeneration, cyst formation, and the presence of fibrous nodules in bone, usually due to hyperparathyroidism.

  • Periostitis

    inflammation of the periosteum. the condition is generally chronic, and is marked by tenderness and swelling of the bone and an aching pain. acute periostitis is due to infection, is characterized by diffuse suppuration, severe pain, and constitutional symptoms, and usually results in necrosis. (dorland, 27th ed)

  • Hyperparathyroidism

    a condition of abnormally elevated output of parathyroid hormone (or pth) triggering responses that increase blood calcium. it is characterized by hypercalcemia and bone resorption, eventually leading to bone diseases. primary hyperparathyroidism is caused by parathyroid hyperplasia or parathyroid neoplasms. secondary hyperparathyroidism is increased pth secretion in response to hypocalcemia, usually caused by chronic kidney diseases.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Inclusion Terms

Inclusion Terms
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.
  • Infection of bone NOS
  • Periostitis without osteomyelitis

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert M86.9 to ICD-9-CM

  • ICD-9-CM Code: 730.20 - Osteomyelitis NOS-unspec
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.
  • ICD-9-CM Code: 730.30 - Periostitis-unspec
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.
  • ICD-9-CM Code: 730.90 - Bone infec NOS-unsp site
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.
  • ICD-9-CM Code: 730.98 - Bone infect NOS-oth site
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education


Bone Infections

Like other parts of the body, bones can get infected. The infections are usually bacterial, but can also be fungal. They may spread to the bone from nearby skin or muscles, or from another part of the body through the bloodstream. People who are at risk for bone infections include those with diabetes, poor circulation, or recent injury to the bone. You may also be at risk if you are having hemodialysis.

Symptoms of bone infections include:

  • Pain in the infected area
  • Chills and fever
  • Swelling, warmth, and redness

A blood test or imaging test such as an x-ray can tell if you have a bone infection. Treatment includes antibiotics and often surgery.


[Learn More in MedlinePlus]

Code History

  • 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
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

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.