DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

M85 Other disorders of bone density and structure

  • Header · not billable

M85 is not billable. The category heads 169 billable codes in FY2027, grouped under 9 subdivisions.

Index → code

  • Osteopenia → M85.8-
  • Morel-Moore syndrome → M85.2
  • Van Buchem's syndrome → M85.2

Where it sits

  1. Chapter 13 Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. M80-M85 Disorders of bone density and structure (M80-M85)
  3. M85 Other disorders of bone density and structure
Billable codes
169
Subdivisions
9
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
138

Codes in M85

  1. M85.0
    Fibrous dysplasia (monostotic)
    Header
    Excludes2 1

    Excludes2

    • fibrous dysplasia of jaw (M27.8) M27.8
  2. M85.00
    Fibrous dysplasia (monostotic), unspecified site
    Billable
  3. M85.01
    Fibrous dysplasia (monostotic), shoulder
    Header
  4. M85.011
    Fibrous dysplasia (monostotic), right shoulder
    Billable
  5. M85.012
    Fibrous dysplasia (monostotic), left shoulder
    Billable
  6. M85.019
    Fibrous dysplasia (monostotic), unspecified shoulder
    Billable
  7. M85.02
    Fibrous dysplasia (monostotic), upper arm
    Header
  8. M85.021
    Fibrous dysplasia (monostotic), right upper arm
    Billable
  9. M85.022
    Fibrous dysplasia (monostotic), left upper arm
    Billable
  10. M85.029
    Fibrous dysplasia (monostotic), unspecified upper arm
    Billable
  11. M85.03
    Fibrous dysplasia (monostotic), forearm
    Header
  12. M85.031
    Fibrous dysplasia (monostotic), right forearm
    Billable
  13. M85.032
    Fibrous dysplasia (monostotic), left forearm
    Billable
  14. M85.039
    Fibrous dysplasia (monostotic), unspecified forearm
    Billable
  15. M85.04
    Fibrous dysplasia (monostotic), hand
    Header
  16. M85.041
    Fibrous dysplasia (monostotic), right hand
    Billable
  17. M85.042
    Fibrous dysplasia (monostotic), left hand
    Billable
  18. M85.049
    Fibrous dysplasia (monostotic), unspecified hand
    Billable
  19. M85.05
    Fibrous dysplasia (monostotic), thigh
    Header
  20. M85.051
    Fibrous dysplasia (monostotic), right thigh
    Billable
  21. M85.052
    Fibrous dysplasia (monostotic), left thigh
    Billable
  22. M85.059
    Fibrous dysplasia (monostotic), unspecified thigh
    Billable
  23. M85.06
    Fibrous dysplasia (monostotic), lower leg
    Header
  24. M85.061
    Fibrous dysplasia (monostotic), right lower leg
    Billable
  25. M85.062
    Fibrous dysplasia (monostotic), left lower leg
    Billable
  26. M85.069
    Fibrous dysplasia (monostotic), unspecified lower leg
    Billable
  27. M85.07
    Fibrous dysplasia (monostotic), ankle and foot
    Header
  28. M85.071
    Fibrous dysplasia (monostotic), right ankle and foot
    Billable
  29. M85.072
    Fibrous dysplasia (monostotic), left ankle and foot
    Billable
  30. M85.079
    Fibrous dysplasia (monostotic), unspecified ankle and foot
    Billable
  31. M85.08
    Fibrous dysplasia (monostotic), other site
    Billable
  32. M85.09
    Fibrous dysplasia (monostotic), multiple sites
    Billable
  33. M85.1
    Skeletal fluorosis
    Header
  34. M85.10
    Skeletal fluorosis, unspecified site
    Billable
  35. M85.11
    Skeletal fluorosis, shoulder
    Header
  36. M85.111
    Skeletal fluorosis, right shoulder
    Billable
  37. M85.112
    Skeletal fluorosis, left shoulder
    Billable
  38. M85.119
    Skeletal fluorosis, unspecified shoulder
    Billable
  39. M85.12
    Skeletal fluorosis, upper arm
    Header
  40. M85.121
    Skeletal fluorosis, right upper arm
    Billable
  41. M85.122
    Skeletal fluorosis, left upper arm
    Billable
  42. M85.129
    Skeletal fluorosis, unspecified upper arm
    Billable
  43. M85.13
    Skeletal fluorosis, forearm
    Header
  44. M85.131
    Skeletal fluorosis, right forearm
    Billable
  45. M85.132
    Skeletal fluorosis, left forearm
    Billable
  46. M85.139
    Skeletal fluorosis, unspecified forearm
    Billable
  47. M85.14
    Skeletal fluorosis, hand
    Header
  48. M85.141
    Skeletal fluorosis, right hand
    Billable
  49. M85.142
    Skeletal fluorosis, left hand
    Billable
  50. M85.149
    Skeletal fluorosis, unspecified hand
    Billable
  51. M85.15
    Skeletal fluorosis, thigh
    Header
  52. M85.151
    Skeletal fluorosis, right thigh
    Billable
  53. M85.152
    Skeletal fluorosis, left thigh
    Billable
  54. M85.159
    Skeletal fluorosis, unspecified thigh
    Billable
  55. M85.16
    Skeletal fluorosis, lower leg
    Header
  56. M85.161
    Skeletal fluorosis, right lower leg
    Billable
  57. M85.162
    Skeletal fluorosis, left lower leg
    Billable
  58. M85.169
    Skeletal fluorosis, unspecified lower leg
    Billable
  59. M85.17
    Skeletal fluorosis, ankle and foot
    Header
  60. M85.171
    Skeletal fluorosis, right ankle and foot
    Billable
  61. M85.172
    Skeletal fluorosis, left ankle and foot
    Billable
  62. M85.179
    Skeletal fluorosis, unspecified ankle and foot
    Billable
  63. M85.18
    Skeletal fluorosis, other site
    Billable
  64. M85.19
    Skeletal fluorosis, multiple sites
    Billable
  65. M85.2
    Hyperostosis of skull
    Billable
  66. M85.3
    Osteitis condensans
    Header
  67. M85.30
    Osteitis condensans, unspecified site
    Billable
  68. M85.31
    Osteitis condensans, shoulder
    Header
  69. M85.311
    Osteitis condensans, right shoulder
    Billable
  70. M85.312
    Osteitis condensans, left shoulder
    Billable
  71. M85.319
    Osteitis condensans, unspecified shoulder
    Billable
  72. M85.32
    Osteitis condensans, upper arm
    Header
  73. M85.321
    Osteitis condensans, right upper arm
    Billable
  74. M85.322
    Osteitis condensans, left upper arm
    Billable
  75. M85.329
    Osteitis condensans, unspecified upper arm
    Billable
  76. M85.33
    Osteitis condensans, forearm
    Header
  77. M85.331
    Osteitis condensans, right forearm
    Billable
  78. M85.332
    Osteitis condensans, left forearm
    Billable
  79. M85.339
    Osteitis condensans, unspecified forearm
    Billable
  80. M85.34
    Osteitis condensans, hand
    Header
  81. M85.341
    Osteitis condensans, right hand
    Billable
  82. M85.342
    Osteitis condensans, left hand
    Billable
  83. M85.349
    Osteitis condensans, unspecified hand
    Billable
  84. M85.35
    Osteitis condensans, thigh
    Header
  85. M85.351
    Osteitis condensans, right thigh
    Billable
  86. M85.352
    Osteitis condensans, left thigh
    Billable
  87. M85.359
    Osteitis condensans, unspecified thigh
    Billable
  88. M85.36
    Osteitis condensans, lower leg
    Header
  89. M85.361
    Osteitis condensans, right lower leg
    Billable
  90. M85.362
    Osteitis condensans, left lower leg
    Billable
  91. M85.369
    Osteitis condensans, unspecified lower leg
    Billable
  92. M85.37
    Osteitis condensans, ankle and foot
    Header
  93. M85.371
    Osteitis condensans, right ankle and foot
    Billable
  94. M85.372
    Osteitis condensans, left ankle and foot
    Billable
  95. M85.379
    Osteitis condensans, unspecified ankle and foot
    Billable
  96. M85.38
    Osteitis condensans, other site
    Billable
  97. M85.39
    Osteitis condensans, multiple sites
    Billable
  98. M85.4
    Solitary bone cyst
    Header
    Excludes2 1

    Excludes2

    • solitary cyst of jaw (M27.4) M27.4
  99. M85.40
    Solitary bone cyst, unspecified site
    Billable
  100. M85.41
    Solitary bone cyst, shoulder
    Header
  101. M85.411
    Solitary bone cyst, right shoulder
    Billable
  102. M85.412
    Solitary bone cyst, left shoulder
    Billable
  103. M85.419
    Solitary bone cyst, unspecified shoulder
    Billable
  104. M85.42
    Solitary bone cyst, humerus
    Header
  105. M85.421
    Solitary bone cyst, right humerus
    Billable
  106. M85.422
    Solitary bone cyst, left humerus
    Billable
  107. M85.429
    Solitary bone cyst, unspecified humerus
    Billable
  108. M85.43
    Solitary bone cyst, ulna and radius
    Header
  109. M85.431
    Solitary bone cyst, right ulna and radius
    Billable
  110. M85.432
    Solitary bone cyst, left ulna and radius
    Billable
  111. M85.439
    Solitary bone cyst, unspecified ulna and radius
    Billable
  112. M85.44
    Solitary bone cyst, hand
    Header
  113. M85.441
    Solitary bone cyst, right hand
    Billable
  114. M85.442
    Solitary bone cyst, left hand
    Billable
  115. M85.449
    Solitary bone cyst, unspecified hand
    Billable
  116. M85.45
    Solitary bone cyst, pelvis
    Header
  117. M85.451
    Solitary bone cyst, right pelvis
    Billable
  118. M85.452
    Solitary bone cyst, left pelvis
    Billable
  119. M85.459
    Solitary bone cyst, unspecified pelvis
    Billable
  120. M85.46
    Solitary bone cyst, tibia and fibula
    Header
  121. M85.461
    Solitary bone cyst, right tibia and fibula
    Billable
  122. M85.462
    Solitary bone cyst, left tibia and fibula
    Billable
  123. M85.469
    Solitary bone cyst, unspecified tibia and fibula
    Billable
  124. M85.47
    Solitary bone cyst, ankle and foot
    Header
  125. M85.471
    Solitary bone cyst, right ankle and foot
    Billable
  126. M85.472
    Solitary bone cyst, left ankle and foot
    Billable
  127. M85.479
    Solitary bone cyst, unspecified ankle and foot
    Billable
  128. M85.48
    Solitary bone cyst, other site
    Billable
  129. M85.5
    Aneurysmal bone cyst
    Header
    Excludes2 1

    Excludes2

    • aneurysmal cyst of jaw (M27.4) M27.4
  130. M85.50
    Aneurysmal bone cyst, unspecified site
    Billable
  131. M85.51
    Aneurysmal bone cyst, shoulder
    Header
  132. M85.511
    Aneurysmal bone cyst, right shoulder
    Billable
  133. M85.512
    Aneurysmal bone cyst, left shoulder
    Billable
  134. M85.519
    Aneurysmal bone cyst, unspecified shoulder
    Billable
  135. M85.52
    Aneurysmal bone cyst, upper arm
    Header
  136. M85.521
    Aneurysmal bone cyst, right upper arm
    Billable
  137. M85.522
    Aneurysmal bone cyst, left upper arm
    Billable
  138. M85.529
    Aneurysmal bone cyst, unspecified upper arm
    Billable
  139. M85.53
    Aneurysmal bone cyst, forearm
    Header
  140. M85.531
    Aneurysmal bone cyst, right forearm
    Billable
  141. M85.532
    Aneurysmal bone cyst, left forearm
    Billable
  142. M85.539
    Aneurysmal bone cyst, unspecified forearm
    Billable
  143. M85.54
    Aneurysmal bone cyst, hand
    Header
  144. M85.541
    Aneurysmal bone cyst, right hand
    Billable
  145. M85.542
    Aneurysmal bone cyst, left hand
    Billable
  146. M85.549
    Aneurysmal bone cyst, unspecified hand
    Billable
  147. M85.55
    Aneurysmal bone cyst, thigh
    Header
  148. M85.551
    Aneurysmal bone cyst, right thigh
    Billable
  149. M85.552
    Aneurysmal bone cyst, left thigh
    Billable
  150. M85.559
    Aneurysmal bone cyst, unspecified thigh
    Billable
  151. M85.56
    Aneurysmal bone cyst, lower leg
    Header
  152. M85.561
    Aneurysmal bone cyst, right lower leg
    Billable
  153. M85.562
    Aneurysmal bone cyst, left lower leg
    Billable
  154. M85.569
    Aneurysmal bone cyst, unspecified lower leg
    Billable
  155. M85.57
    Aneurysmal bone cyst, ankle and foot
    Header
  156. M85.571
    Aneurysmal bone cyst, right ankle and foot
    Billable
  157. M85.572
    Aneurysmal bone cyst, left ankle and foot
    Billable
  158. M85.579
    Aneurysmal bone cyst, unspecified ankle and foot
    Billable
  159. M85.58
    Aneurysmal bone cyst, other site
    Billable
  160. M85.59
    Aneurysmal bone cyst, multiple sites
    Billable
  161. M85.6
    Other cyst of bone
    Header
    Excludes1 2

    Excludes1

    • cyst of jaw NEC (M27.4) M27.4
    • osteitis fibrosa cystica generalisata [von Recklinghausen's disease of bone] (E21.0) E21.0
  162. M85.60
    Other cyst of bone, unspecified site
    Billable
  163. M85.61
    Other cyst of bone, shoulder
    Header
  164. M85.611
    Other cyst of bone, right shoulder
    Billable
  165. M85.612
    Other cyst of bone, left shoulder
    Billable
  166. M85.619
    Other cyst of bone, unspecified shoulder
    Billable
  167. M85.62
    Other cyst of bone, upper arm
    Header
  168. M85.621
    Other cyst of bone, right upper arm
    Billable
  169. M85.622
    Other cyst of bone, left upper arm
    Billable
  170. M85.629
    Other cyst of bone, unspecified upper arm
    Billable
  171. M85.63
    Other cyst of bone, forearm
    Header
  172. M85.631
    Other cyst of bone, right forearm
    Billable
  173. M85.632
    Other cyst of bone, left forearm
    Billable
  174. M85.639
    Other cyst of bone, unspecified forearm
    Billable
  175. M85.64
    Other cyst of bone, hand
    Header
  176. M85.641
    Other cyst of bone, right hand
    Billable
  177. M85.642
    Other cyst of bone, left hand
    Billable
  178. M85.649
    Other cyst of bone, unspecified hand
    Billable
  179. M85.65
    Other cyst of bone, thigh
    Header
  180. M85.651
    Other cyst of bone, right thigh
    Billable
  181. M85.652
    Other cyst of bone, left thigh
    Billable
  182. M85.659
    Other cyst of bone, unspecified thigh
    Billable
  183. M85.66
    Other cyst of bone, lower leg
    Header
  184. M85.661
    Other cyst of bone, right lower leg
    Billable
  185. M85.662
    Other cyst of bone, left lower leg
    Billable
  186. M85.669
    Other cyst of bone, unspecified lower leg
    Billable
  187. M85.67
    Other cyst of bone, ankle and foot
    Header
  188. M85.671
    Other cyst of bone, right ankle and foot
    Billable
  189. M85.672
    Other cyst of bone, left ankle and foot
    Billable
  190. M85.679
    Other cyst of bone, unspecified ankle and foot
    Billable
  191. M85.68
    Other cyst of bone, other site
    Billable
  192. M85.69
    Other cyst of bone, multiple sites
    Billable
  193. M85.8
    Other specified disorders of bone density and structure
    Header
    Inclusion terms 2, Excludes1 4

    Inclusion terms

    • Hyperostosis of bones, except skull
    • Osteosclerosis, acquired

    Excludes1

    • diffuse idiopathic skeletal hyperostosis [DISH] (M48.1) M48.1
    • osteosclerosis congenita (Q77.4) Q77.4
    • osteosclerosis fragilitas (generalista) (Q78.2) Q78.2
    • osteosclerosis myelofibrosis (D75.81) D75.81
  194. M85.80
    Other specified disorders of bone density and structure, unspecified site
    Billable
  195. M85.81
    Other specified disorders of bone density and structure, shoulder
    Header
  196. M85.811
    Other specified disorders of bone density and structure, right shoulder
    Billable
  197. M85.812
    Other specified disorders of bone density and structure, left shoulder
    Billable
  198. M85.819
    Other specified disorders of bone density and structure, unspecified shoulder
    Billable
  199. M85.82
    Other specified disorders of bone density and structure, upper arm
    Header
  200. M85.821
    Other specified disorders of bone density and structure, right upper arm
    Billable
  201. M85.822
    Other specified disorders of bone density and structure, left upper arm
    Billable
  202. M85.829
    Other specified disorders of bone density and structure, unspecified upper arm
    Billable
  203. M85.83
    Other specified disorders of bone density and structure, forearm
    Header
  204. M85.831
    Other specified disorders of bone density and structure, right forearm
    Billable
  205. M85.832
    Other specified disorders of bone density and structure, left forearm
    Billable
  206. M85.839
    Other specified disorders of bone density and structure, unspecified forearm
    Billable
  207. M85.84
    Other specified disorders of bone density and structure, hand
    Header
  208. M85.841
    Other specified disorders of bone density and structure, right hand
    Billable
  209. M85.842
    Other specified disorders of bone density and structure, left hand
    Billable
  210. M85.849
    Other specified disorders of bone density and structure, unspecified hand
    Billable
  211. M85.85
    Other specified disorders of bone density and structure, thigh
    Header
  212. M85.851
    Other specified disorders of bone density and structure, right thigh
    Billable
  213. M85.852
    Other specified disorders of bone density and structure, left thigh
    Billable
  214. M85.859
    Other specified disorders of bone density and structure, unspecified thigh
    Billable
  215. M85.86
    Other specified disorders of bone density and structure, lower leg
    Header
  216. M85.861
    Other specified disorders of bone density and structure, right lower leg
    Billable
  217. M85.862
    Other specified disorders of bone density and structure, left lower leg
    Billable
  218. M85.869
    Other specified disorders of bone density and structure, unspecified lower leg
    Billable
  219. M85.87
    Other specified disorders of bone density and structure, ankle and foot
    Header
  220. M85.871
    Other specified disorders of bone density and structure, right ankle and foot
    Billable
  221. M85.872
    Other specified disorders of bone density and structure, left ankle and foot
    Billable
  222. M85.879
    Other specified disorders of bone density and structure, unspecified ankle and foot
    Billable
  223. M85.88
    Other specified disorders of bone density and structure, other site
    Billable
  224. M85.89
    Other specified disorders of bone density and structure, multiple sites
    Billable
  225. M85.9
    Disorder of bone density and structure, unspecified
    Billable

Sources of each column.

Instructions

At M85

Excludes1

  • osteogenesis imperfecta (Q78.0) Q78.0
  • osteopetrosis (Q78.2) Q78.2
  • osteopoikilosis (Q78.8) Q78.8
  • polyostotic fibrous dysplasia (Q78.1) Q78.1

Notes that also apply

Chapter 13 instructions (Notes 1, Excludes2 10): printed on the chapter 13 page.

Index entries

  • Buchem's syndrome (hyperostosis corticalis) → M85.2
  • Craniopathy, metabolic → M85.2
  • Morel (-Stewart)(-Morgagni) syndrome → M85.2
  • Morel-Moore syndrome → M85.2
  • Morgagni-Stewart-Morel syndrome → M85.2
  • Stewart-Morel syndrome → M85.2
  • Van Buchem's syndrome → M85.2
  • Osteopenia → M85.8-
  • Fluorosisskeletal → M85.10
  • Disease, diseasedMorgagni's (syndrome) (hyperostosis frontalis interna) → M85.2
  • Hyperostosis (monomelic)cortical (skull) → M85.2
  • Hyperostosis (monomelic)frontal, internal of skull → M85.2
  • Hyperostosis (monomelic)interna frontalis → M85.2
  • Hyperostosis (monomelic)skull → M85.2
  • Leontiasisossium → M85.2
  • Morgagni'ssyndrome → M85.2
  • SyndromeBuchem's → M85.2
  • SyndromeMorel-Moore → M85.2
  • SyndromeMorel-Morgagni → M85.2
  • SyndromeMorgagni (-Morel) (-Stewart) → M85.2
  • SyndromeStewart-Morel → M85.2
  • Syndromevan Buchem's → M85.2
  • Osteitiscondensans → M85.30
  • Cyst (colloid) (mucous) (simple) (retention)bone (local) NEC → M85.60
  • Borderlineosteopenia → M85.8-
  • Osteopeniaborderline → M85.8-
  • Osteosclerosisacquired → M85.8-
  • Dysplasiafibrousbone NEC (monostotic) → M85.00
  • Fluorosisskeletalshoulder → M85.11-
  • Fluorosisskeletalupper arm → M85.12-
  • Fluorosisskeletalforearm → M85.13-
  • Fluorosisskeletalhand → M85.14-
  • Fluorosisskeletalthigh → M85.15-
  • Fluorosisskeletallower leg → M85.16-
  • Fluorosisskeletalankle → M85.17-
  • Fluorosisskeletalfoot → M85.17-
  • Fluorosisskeletaltoe → M85.17-
  • Fluorosisskeletalneck → M85.18
  • Fluorosisskeletalrib → M85.18
  • Fluorosisskeletalskull → M85.18

98 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy