ICD-10-CM Code M85

Other disorders of bone density and structure

  1. ICD-10-CM Index
  2. Chapter: M00–M99
  3. Section: M80-M85
  4. Block: M85
  5. M85 - Other disorders of bone density and structure
Version 2020 Non-Billable Code

Not Valid for Submission

M85 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of other disorders of bone density and structure. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M85
Short Description:Other disorders of bone density and structure
Long Description:Other disorders of bone density and structure

Consider the following ICD-10 codes with a higher level of specificity:

  • M85.0 - Fibrous dysplasia (monostotic)
  • M85.00 - Fibrous dysplasia (monostotic), unspecified site
  • M85.01 - Fibrous dysplasia (monostotic), shoulder
  • M85.011 - Fibrous dysplasia (monostotic), right shoulder
  • M85.012 - Fibrous dysplasia (monostotic), left shoulder
  • M85.019 - Fibrous dysplasia (monostotic), unspecified shoulder
  • M85.02 - Fibrous dysplasia (monostotic), upper arm
  • M85.021 - Fibrous dysplasia (monostotic), right upper arm
  • M85.022 - Fibrous dysplasia (monostotic), left upper arm
  • M85.029 - Fibrous dysplasia (monostotic), unspecified upper arm
  • M85.03 - Fibrous dysplasia (monostotic), forearm
  • M85.031 - Fibrous dysplasia (monostotic), right forearm
  • M85.032 - Fibrous dysplasia (monostotic), left forearm
  • M85.039 - Fibrous dysplasia (monostotic), unspecified forearm
  • M85.04 - Fibrous dysplasia (monostotic), hand
  • M85.041 - Fibrous dysplasia (monostotic), right hand
  • M85.042 - Fibrous dysplasia (monostotic), left hand
  • M85.049 - Fibrous dysplasia (monostotic), unspecified hand
  • M85.05 - Fibrous dysplasia (monostotic), thigh
  • M85.051 - Fibrous dysplasia (monostotic), right thigh
  • M85.052 - Fibrous dysplasia (monostotic), left thigh
  • M85.059 - Fibrous dysplasia (monostotic), unspecified thigh
  • M85.06 - Fibrous dysplasia (monostotic), lower leg
  • M85.061 - Fibrous dysplasia (monostotic), right lower leg
  • M85.062 - Fibrous dysplasia (monostotic), left lower leg
  • M85.069 - Fibrous dysplasia (monostotic), unspecified lower leg
  • M85.07 - Fibrous dysplasia (monostotic), ankle and foot
  • M85.071 - Fibrous dysplasia (monostotic), right ankle and foot
  • M85.072 - Fibrous dysplasia (monostotic), left ankle and foot
  • M85.079 - Fibrous dysplasia (monostotic), unspecified ankle and foot
  • M85.08 - Fibrous dysplasia (monostotic), other site
  • M85.09 - Fibrous dysplasia (monostotic), multiple sites
  • M85.1 - Skeletal fluorosis
  • M85.10 - Skeletal fluorosis, unspecified site
  • M85.11 - Skeletal fluorosis, shoulder
  • M85.111 - Skeletal fluorosis, right shoulder
  • M85.112 - Skeletal fluorosis, left shoulder
  • M85.119 - Skeletal fluorosis, unspecified shoulder
  • M85.12 - Skeletal fluorosis, upper arm
  • M85.121 - Skeletal fluorosis, right upper arm
  • M85.122 - Skeletal fluorosis, left upper arm
  • M85.129 - Skeletal fluorosis, unspecified upper arm
  • M85.13 - Skeletal fluorosis, forearm
  • M85.131 - Skeletal fluorosis, right forearm
  • M85.132 - Skeletal fluorosis, left forearm
  • M85.139 - Skeletal fluorosis, unspecified forearm
  • M85.14 - Skeletal fluorosis, hand
  • M85.141 - Skeletal fluorosis, right hand
  • M85.142 - Skeletal fluorosis, left hand
  • M85.149 - Skeletal fluorosis, unspecified hand
  • M85.15 - Skeletal fluorosis, thigh
  • M85.151 - Skeletal fluorosis, right thigh
  • M85.152 - Skeletal fluorosis, left thigh
  • M85.159 - Skeletal fluorosis, unspecified thigh
  • M85.16 - Skeletal fluorosis, lower leg
  • M85.161 - Skeletal fluorosis, right lower leg
  • M85.162 - Skeletal fluorosis, left lower leg
  • M85.169 - Skeletal fluorosis, unspecified lower leg
  • M85.17 - Skeletal fluorosis, ankle and foot
  • M85.171 - Skeletal fluorosis, right ankle and foot
  • M85.172 - Skeletal fluorosis, left ankle and foot
  • M85.179 - Skeletal fluorosis, unspecified ankle and foot
  • M85.18 - Skeletal fluorosis, other site
  • M85.19 - Skeletal fluorosis, multiple sites
  • M85.2 - Hyperostosis of skull
  • M85.3 - Osteitis condensans
  • M85.30 - Osteitis condensans, unspecified site
  • M85.31 - Osteitis condensans, shoulder
  • M85.311 - Osteitis condensans, right shoulder
  • M85.312 - Osteitis condensans, left shoulder
  • M85.319 - Osteitis condensans, unspecified shoulder
  • M85.32 - Osteitis condensans, upper arm
  • M85.321 - Osteitis condensans, right upper arm
  • M85.322 - Osteitis condensans, left upper arm
  • M85.329 - Osteitis condensans, unspecified upper arm
  • M85.33 - Osteitis condensans, forearm
  • M85.331 - Osteitis condensans, right forearm
  • M85.332 - Osteitis condensans, left forearm
  • M85.339 - Osteitis condensans, unspecified forearm
  • M85.34 - Osteitis condensans, hand
  • M85.341 - Osteitis condensans, right hand
  • M85.342 - Osteitis condensans, left hand
  • M85.349 - Osteitis condensans, unspecified hand
  • M85.35 - Osteitis condensans, thigh
  • M85.351 - Osteitis condensans, right thigh
  • M85.352 - Osteitis condensans, left thigh
  • M85.359 - Osteitis condensans, unspecified thigh
  • M85.36 - Osteitis condensans, lower leg
  • M85.361 - Osteitis condensans, right lower leg
  • M85.362 - Osteitis condensans, left lower leg
  • M85.369 - Osteitis condensans, unspecified lower leg
  • M85.37 - Osteitis condensans, ankle and foot
  • M85.371 - Osteitis condensans, right ankle and foot
  • M85.372 - Osteitis condensans, left ankle and foot
  • M85.379 - Osteitis condensans, unspecified ankle and foot
  • M85.38 - Osteitis condensans, other site
  • M85.39 - Osteitis condensans, multiple sites
  • M85.4 - Solitary bone cyst
  • M85.40 - Solitary bone cyst, unspecified site
  • M85.41 - Solitary bone cyst, shoulder
  • M85.411 - Solitary bone cyst, right shoulder
  • M85.412 - Solitary bone cyst, left shoulder
  • M85.419 - Solitary bone cyst, unspecified shoulder
  • M85.42 - Solitary bone cyst, humerus
  • M85.421 - Solitary bone cyst, right humerus
  • M85.422 - Solitary bone cyst, left humerus
  • M85.429 - Solitary bone cyst, unspecified humerus
  • M85.43 - Solitary bone cyst, ulna and radius
  • M85.431 - Solitary bone cyst, right ulna and radius
  • M85.432 - Solitary bone cyst, left ulna and radius
  • M85.439 - Solitary bone cyst, unspecified ulna and radius
  • M85.44 - Solitary bone cyst, hand
  • M85.441 - Solitary bone cyst, right hand
  • M85.442 - Solitary bone cyst, left hand
  • M85.449 - Solitary bone cyst, unspecified hand
  • M85.45 - Solitary bone cyst, pelvis
  • M85.451 - Solitary bone cyst, right pelvis
  • M85.452 - Solitary bone cyst, left pelvis
  • M85.459 - Solitary bone cyst, unspecified pelvis
  • M85.46 - Solitary bone cyst, tibia and fibula
  • M85.461 - Solitary bone cyst, right tibia and fibula
  • M85.462 - Solitary bone cyst, left tibia and fibula
  • M85.469 - Solitary bone cyst, unspecified tibia and fibula
  • M85.47 - Solitary bone cyst, ankle and foot
  • M85.471 - Solitary bone cyst, right ankle and foot
  • M85.472 - Solitary bone cyst, left ankle and foot
  • M85.479 - Solitary bone cyst, unspecified ankle and foot
  • M85.48 - Solitary bone cyst, other site
  • M85.5 - Aneurysmal bone cyst
  • M85.50 - Aneurysmal bone cyst, unspecified site
  • M85.51 - Aneurysmal bone cyst, shoulder
  • M85.511 - Aneurysmal bone cyst, right shoulder
  • M85.512 - Aneurysmal bone cyst, left shoulder
  • M85.519 - Aneurysmal bone cyst, unspecified shoulder
  • M85.52 - Aneurysmal bone cyst, upper arm
  • M85.521 - Aneurysmal bone cyst, right upper arm
  • M85.522 - Aneurysmal bone cyst, left upper arm
  • M85.529 - Aneurysmal bone cyst, unspecified upper arm
  • M85.53 - Aneurysmal bone cyst, forearm
  • M85.531 - Aneurysmal bone cyst, right forearm
  • M85.532 - Aneurysmal bone cyst, left forearm
  • M85.539 - Aneurysmal bone cyst, unspecified forearm
  • M85.54 - Aneurysmal bone cyst, hand
  • M85.541 - Aneurysmal bone cyst, right hand
  • M85.542 - Aneurysmal bone cyst, left hand
  • M85.549 - Aneurysmal bone cyst, unspecified hand
  • M85.55 - Aneurysmal bone cyst, thigh
  • M85.551 - Aneurysmal bone cyst, right thigh
  • M85.552 - Aneurysmal bone cyst, left thigh
  • M85.559 - Aneurysmal bone cyst, unspecified thigh
  • M85.56 - Aneurysmal bone cyst, lower leg
  • M85.561 - Aneurysmal bone cyst, right lower leg
  • M85.562 - Aneurysmal bone cyst, left lower leg
  • M85.569 - Aneurysmal bone cyst, unspecified lower leg
  • M85.57 - Aneurysmal bone cyst, ankle and foot
  • M85.571 - Aneurysmal bone cyst, right ankle and foot
  • M85.572 - Aneurysmal bone cyst, left ankle and foot
  • M85.579 - Aneurysmal bone cyst, unspecified ankle and foot
  • M85.58 - Aneurysmal bone cyst, other site
  • M85.59 - Aneurysmal bone cyst, multiple sites
  • M85.6 - Other cyst of bone
  • M85.60 - Other cyst of bone, unspecified site
  • M85.61 - Other cyst of bone, shoulder
  • M85.611 - Other cyst of bone, right shoulder
  • M85.612 - Other cyst of bone, left shoulder
  • M85.619 - Other cyst of bone, unspecified shoulder
  • M85.62 - Other cyst of bone, upper arm
  • M85.621 - Other cyst of bone, right upper arm
  • M85.622 - Other cyst of bone, left upper arm
  • M85.629 - Other cyst of bone, unspecified upper arm
  • M85.63 - Other cyst of bone, forearm
  • M85.631 - Other cyst of bone, right forearm
  • M85.632 - Other cyst of bone, left forearm
  • M85.639 - Other cyst of bone, unspecified forearm
  • M85.64 - Other cyst of bone, hand
  • M85.641 - Other cyst of bone, right hand
  • M85.642 - Other cyst of bone, left hand
  • M85.649 - Other cyst of bone, unspecified hand
  • M85.65 - Other cyst of bone, thigh
  • M85.651 - Other cyst of bone, right thigh
  • M85.652 - Other cyst of bone, left thigh
  • M85.659 - Other cyst of bone, unspecified thigh
  • M85.66 - Other cyst of bone, lower leg
  • M85.661 - Other cyst of bone, right lower leg
  • M85.662 - Other cyst of bone, left lower leg
  • M85.669 - Other cyst of bone, unspecified lower leg
  • M85.67 - Other cyst of bone, ankle and foot
  • M85.671 - Other cyst of bone, right ankle and foot
  • M85.672 - Other cyst of bone, left ankle and foot
  • M85.679 - Other cyst of bone, unspecified ankle and foot
  • M85.68 - Other cyst of bone, other site
  • M85.69 - Other cyst of bone, multiple sites
  • M85.8 - Other specified disorders of bone density and structure
  • M85.80 - Other specified disorders of bone density and structure, unspecified site
  • M85.81 - Other specified disorders of bone density and structure, shoulder
  • M85.811 - Other specified disorders of bone density and structure, right shoulder
  • M85.812 - Other specified disorders of bone density and structure, left shoulder
  • M85.819 - Other specified disorders of bone density and structure, unspecified shoulder
  • M85.82 - Other specified disorders of bone density and structure, upper arm
  • M85.821 - Other specified disorders of bone density and structure, right upper arm
  • M85.822 - Other specified disorders of bone density and structure, left upper arm
  • M85.829 - Other specified disorders of bone density and structure, unspecified upper arm
  • M85.83 - Other specified disorders of bone density and structure, forearm
  • M85.831 - Other specified disorders of bone density and structure, right forearm
  • M85.832 - Other specified disorders of bone density and structure, left forearm
  • M85.839 - Other specified disorders of bone density and structure, unspecified forearm
  • M85.84 - Other specified disorders of bone density and structure, hand
  • M85.841 - Other specified disorders of bone density and structure, right hand
  • M85.842 - Other specified disorders of bone density and structure, left hand
  • M85.849 - Other specified disorders of bone density and structure, unspecified hand
  • M85.85 - Other specified disorders of bone density and structure, thigh
  • M85.851 - Other specified disorders of bone density and structure, right thigh
  • M85.852 - Other specified disorders of bone density and structure, left thigh
  • M85.859 - Other specified disorders of bone density and structure, unspecified thigh
  • M85.86 - Other specified disorders of bone density and structure, lower leg
  • M85.861 - Other specified disorders of bone density and structure, right lower leg
  • M85.862 - Other specified disorders of bone density and structure, left lower leg
  • M85.869 - Other specified disorders of bone density and structure, unspecified lower leg
  • M85.87 - Other specified disorders of bone density and structure, ankle and foot
  • M85.871 - Other specified disorders of bone density and structure, right ankle and foot
  • M85.872 - Other specified disorders of bone density and structure, left ankle and foot
  • M85.879 - Other specified disorders of bone density and structure, unspecified ankle and foot
  • M85.88 - Other specified disorders of bone density and structure, other site
  • M85.89 - Other specified disorders of bone density and structure, multiple sites
  • M85.9 - Disorder of bone density and structure, unspecified

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code M85:

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • osteogenesis imperfecta Q78.0
  • osteopetrosis Q78.2
  • osteopoikilosis Q78.8
  • polyostotic fibrous dysplasia Q78.1

Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Disorders of bone density and structure (M80-M85)
      • Other disorders of bone density and structure (M85)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Bone Density

Strong bones are important for your health. A bone mineral density (BMD) test is the best way to measure your bone health. It compares your bone density, or mass, to that of a healthy person who is the same age and sex as you are. It can show

  • Whether you have osteoporosis, a disease that makes your bones weak
  • Your risk for breaking bones
  • Whether your osteoporosis treatment is working

Low bone mass that is not low enough to be osteoporosis is sometimes called osteopenia. Causes of low bone mass include family history, not developing good bone mass when you are young, and certain conditions or medicines. Not everyone who has low bone mass gets osteoporosis, but they are at higher risk for getting it.

If you have low bone mass, there are things you can do to help slow down bone loss. These include eating foods rich in calcium and vitamin D and doing weight-bearing exercise such as walking, tennis, or dancing. In some cases, your doctor may prescribe medicines to prevent osteoporosis.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More]

Bone Diseases

Your bones help you move, give you shape and support your body. They are living tissues that rebuild constantly throughout your life. During childhood and your teens, your body adds new bone faster than it removes old bone. After about age 20, you can lose bone faster than you make bone. To have strong bones when you are young, and to prevent bone loss when you are older, you need to get enough calcium, vitamin D, and exercise. You should also avoid smoking and drinking too much alcohol.

Bone diseases can make bones easy to break. Different kinds of bone problems include

  • Low bone density and osteoporosis, which make your bones weak and more likely to break
  • Osteogenesis imperfecta makes your bones brittle
  • Paget's disease of bone makes them weak
  • Bones can also develop cancer and infections
  • Other bone diseases, which are caused by poor nutrition, genetics, or problems with the rate of bone growth or rebuilding

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More]

Previous Code: M84.9

Related Codes

Next Code: M85.0