ICD-10-CM M85: Other disorders of bone density and structure

ICD-10-CM Diagnosis Code (2025)

Official Description for M85

Other disorders of bone density and structure

Coding Notes & Guidelines for M85

Excludes1: Not Coded Here
  • osteogenesis imperfecta (Q78.0)
  • osteopetrosis (Q78.2)
  • osteopoikilosis (Q78.8)
  • polyostotic fibrous dysplasia (Q78.1)
Excludes1: Not Coded Here
  • cyst of jaw NEC (M27.4)
  • osteitis fibrosa cystica generalisata [von Recklinghausen's disease of bone] (E21.0)
Excludes1: Not Coded Here
  • diffuse idiopathic skeletal hyperostosis [DISH] (M48.1)
  • osteosclerosis congenita (Q77.4)
  • osteosclerosis fragilitas (generalista) (Q78.2)
  • osteosclerosis myelofibrosis (D75.81)
Excludes2: Not Included Here

fibrous dysplasia of jaw (M27.8)

Excludes2: Not Included Here

solitary cyst of jaw (M27.4)

Excludes2: Not Included Here

aneurysmal cyst of jaw (M27.4)

Inclusion Terms
  • Hyperostosis of bones, except skull
  • Osteosclerosis, acquired

Child Codes (More Specific Codes for M85):

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

About ICD-10-CM Code M85 (Other disorders of bone density and structure)

ICD-10-CM code M85 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM M85 became effective on October 1, 2024.

This page provides detailed information about M85 - Other disorders of bone density and structure. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Other disorders of bone density and structure.