DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

M12 Other and unspecified arthropathy

  • Header · not billable

M12 is not billable. The category heads 169 billable codes in FY2027, grouped under 8 subdivisions.

Index → code

  • Arthropathy → M12.9
  • Arthropathytraumatic → M12.50
  • Hydrarthrosisintermittent → M12.40

Where it sits

  1. Chapter 13 Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. M05-M14 Inflammatory polyarthropathies (M05-M14)
  3. M12 Other and unspecified arthropathy
Billable codes
169
Subdivisions
8
CC / MCC codes
0 / 0
HCC V28 codes
24
New FY2027
0
Index entries
93

Codes in M12

  1. M12.0
    Chronic postrheumatic arthropathy [Jaccoud]
    Header
  2. M12.00
    Chronic postrheumatic arthropathy [Jaccoud], unspecified site
    Billable94
  3. M12.01
    Chronic postrheumatic arthropathy [Jaccoud], shoulder
    Header
  4. M12.011
    Chronic postrheumatic arthropathy [Jaccoud], right shoulder
    Billable94
  5. M12.012
    Chronic postrheumatic arthropathy [Jaccoud], left shoulder
    Billable94
  6. M12.019
    Chronic postrheumatic arthropathy [Jaccoud], unspecified shoulder
    Billable94
  7. M12.02
    Chronic postrheumatic arthropathy [Jaccoud], elbow
    Header
  8. M12.021
    Chronic postrheumatic arthropathy [Jaccoud], right elbow
    Billable94
  9. M12.022
    Chronic postrheumatic arthropathy [Jaccoud], left elbow
    Billable94
  10. M12.029
    Chronic postrheumatic arthropathy [Jaccoud], unspecified elbow
    Billable94
  11. M12.03
    Chronic postrheumatic arthropathy [Jaccoud], wrist
    Header
  12. M12.031
    Chronic postrheumatic arthropathy [Jaccoud], right wrist
    Billable94
  13. M12.032
    Chronic postrheumatic arthropathy [Jaccoud], left wrist
    Billable94
  14. M12.039
    Chronic postrheumatic arthropathy [Jaccoud], unspecified wrist
    Billable94
  15. M12.04
    Chronic postrheumatic arthropathy [Jaccoud], hand
    Header
  16. M12.041
    Chronic postrheumatic arthropathy [Jaccoud], right hand
    Billable94
  17. M12.042
    Chronic postrheumatic arthropathy [Jaccoud], left hand
    Billable94
  18. M12.049
    Chronic postrheumatic arthropathy [Jaccoud], unspecified hand
    Billable94
  19. M12.05
    Chronic postrheumatic arthropathy [Jaccoud], hip
    Header
  20. M12.051
    Chronic postrheumatic arthropathy [Jaccoud], right hip
    Billable94
  21. M12.052
    Chronic postrheumatic arthropathy [Jaccoud], left hip
    Billable94
  22. M12.059
    Chronic postrheumatic arthropathy [Jaccoud], unspecified hip
    Billable94
  23. M12.06
    Chronic postrheumatic arthropathy [Jaccoud], knee
    Header
  24. M12.061
    Chronic postrheumatic arthropathy [Jaccoud], right knee
    Billable94
  25. M12.062
    Chronic postrheumatic arthropathy [Jaccoud], left knee
    Billable94
  26. M12.069
    Chronic postrheumatic arthropathy [Jaccoud], unspecified knee
    Billable94
  27. M12.07
    Chronic postrheumatic arthropathy [Jaccoud], ankle and foot
    Header
  28. M12.071
    Chronic postrheumatic arthropathy [Jaccoud], right ankle and foot
    Billable94
  29. M12.072
    Chronic postrheumatic arthropathy [Jaccoud], left ankle and foot
    Billable94
  30. M12.079
    Chronic postrheumatic arthropathy [Jaccoud], unspecified ankle and foot
    Billable94
  31. M12.08
    Chronic postrheumatic arthropathy [Jaccoud], other specified site
    Billable94
    Inclusion terms 1

    Inclusion terms

    • Chronic postrheumatic arthropathy [Jaccoud], vertebrae
  32. M12.09
    Chronic postrheumatic arthropathy [Jaccoud], multiple sites
    Billable94
  33. M12.1
    Kaschin-Beck disease
    Header
    Inclusion terms 1

    Inclusion terms

    • Osteochondroarthrosis deformans endemica
  34. M12.10
    Kaschin-Beck disease, unspecified site
    Billable
  35. M12.11
    Kaschin-Beck disease, shoulder
    Header
  36. M12.111
    Kaschin-Beck disease, right shoulder
    Billable
  37. M12.112
    Kaschin-Beck disease, left shoulder
    Billable
  38. M12.119
    Kaschin-Beck disease, unspecified shoulder
    Billable
  39. M12.12
    Kaschin-Beck disease, elbow
    Header
  40. M12.121
    Kaschin-Beck disease, right elbow
    Billable
  41. M12.122
    Kaschin-Beck disease, left elbow
    Billable
  42. M12.129
    Kaschin-Beck disease, unspecified elbow
    Billable
  43. M12.13
    Kaschin-Beck disease, wrist
    Header
  44. M12.131
    Kaschin-Beck disease, right wrist
    Billable
  45. M12.132
    Kaschin-Beck disease, left wrist
    Billable
  46. M12.139
    Kaschin-Beck disease, unspecified wrist
    Billable
  47. M12.14
    Kaschin-Beck disease, hand
    Header
  48. M12.141
    Kaschin-Beck disease, right hand
    Billable
  49. M12.142
    Kaschin-Beck disease, left hand
    Billable
  50. M12.149
    Kaschin-Beck disease, unspecified hand
    Billable
  51. M12.15
    Kaschin-Beck disease, hip
    Header
  52. M12.151
    Kaschin-Beck disease, right hip
    Billable
  53. M12.152
    Kaschin-Beck disease, left hip
    Billable
  54. M12.159
    Kaschin-Beck disease, unspecified hip
    Billable
  55. M12.16
    Kaschin-Beck disease, knee
    Header
  56. M12.161
    Kaschin-Beck disease, right knee
    Billable
  57. M12.162
    Kaschin-Beck disease, left knee
    Billable
  58. M12.169
    Kaschin-Beck disease, unspecified knee
    Billable
  59. M12.17
    Kaschin-Beck disease, ankle and foot
    Header
  60. M12.171
    Kaschin-Beck disease, right ankle and foot
    Billable
  61. M12.172
    Kaschin-Beck disease, left ankle and foot
    Billable
  62. M12.179
    Kaschin-Beck disease, unspecified ankle and foot
    Billable
  63. M12.18
    Kaschin-Beck disease, vertebrae
    Billable
  64. M12.19
    Kaschin-Beck disease, multiple sites
    Billable
  65. M12.2
    Villonodular synovitis (pigmented)
    Header
  66. M12.20
    Villonodular synovitis (pigmented), unspecified site
    Billable
  67. M12.21
    Villonodular synovitis (pigmented), shoulder
    Header
  68. M12.211
    Villonodular synovitis (pigmented), right shoulder
    Billable
  69. M12.212
    Villonodular synovitis (pigmented), left shoulder
    Billable
  70. M12.219
    Villonodular synovitis (pigmented), unspecified shoulder
    Billable
  71. M12.22
    Villonodular synovitis (pigmented), elbow
    Header
  72. M12.221
    Villonodular synovitis (pigmented), right elbow
    Billable
  73. M12.222
    Villonodular synovitis (pigmented), left elbow
    Billable
  74. M12.229
    Villonodular synovitis (pigmented), unspecified elbow
    Billable
  75. M12.23
    Villonodular synovitis (pigmented), wrist
    Header
  76. M12.231
    Villonodular synovitis (pigmented), right wrist
    Billable
  77. M12.232
    Villonodular synovitis (pigmented), left wrist
    Billable
  78. M12.239
    Villonodular synovitis (pigmented), unspecified wrist
    Billable
  79. M12.24
    Villonodular synovitis (pigmented), hand
    Header
  80. M12.241
    Villonodular synovitis (pigmented), right hand
    Billable
  81. M12.242
    Villonodular synovitis (pigmented), left hand
    Billable
  82. M12.249
    Villonodular synovitis (pigmented), unspecified hand
    Billable
  83. M12.25
    Villonodular synovitis (pigmented), hip
    Header
  84. M12.251
    Villonodular synovitis (pigmented), right hip
    Billable
  85. M12.252
    Villonodular synovitis (pigmented), left hip
    Billable
  86. M12.259
    Villonodular synovitis (pigmented), unspecified hip
    Billable
  87. M12.26
    Villonodular synovitis (pigmented), knee
    Header
  88. M12.261
    Villonodular synovitis (pigmented), right knee
    Billable
  89. M12.262
    Villonodular synovitis (pigmented), left knee
    Billable
  90. M12.269
    Villonodular synovitis (pigmented), unspecified knee
    Billable
  91. M12.27
    Villonodular synovitis (pigmented), ankle and foot
    Header
  92. M12.271
    Villonodular synovitis (pigmented), right ankle and foot
    Billable
  93. M12.272
    Villonodular synovitis (pigmented), left ankle and foot
    Billable
  94. M12.279
    Villonodular synovitis (pigmented), unspecified ankle and foot
    Billable
  95. M12.28
    Villonodular synovitis (pigmented), other specified site
    Billable
    Inclusion terms 1

    Inclusion terms

    • Villonodular synovitis (pigmented), vertebrae
  96. M12.29
    Villonodular synovitis (pigmented), multiple sites
    Billable
  97. M12.3
    Palindromic rheumatism
    Header
  98. M12.30
    Palindromic rheumatism, unspecified site
    Billable
  99. M12.31
    Palindromic rheumatism, shoulder
    Header
  100. M12.311
    Palindromic rheumatism, right shoulder
    Billable
  101. M12.312
    Palindromic rheumatism, left shoulder
    Billable
  102. M12.319
    Palindromic rheumatism, unspecified shoulder
    Billable
  103. M12.32
    Palindromic rheumatism, elbow
    Header
  104. M12.321
    Palindromic rheumatism, right elbow
    Billable
  105. M12.322
    Palindromic rheumatism, left elbow
    Billable
  106. M12.329
    Palindromic rheumatism, unspecified elbow
    Billable
  107. M12.33
    Palindromic rheumatism, wrist
    Header
  108. M12.331
    Palindromic rheumatism, right wrist
    Billable
  109. M12.332
    Palindromic rheumatism, left wrist
    Billable
  110. M12.339
    Palindromic rheumatism, unspecified wrist
    Billable
  111. M12.34
    Palindromic rheumatism, hand
    Header
  112. M12.341
    Palindromic rheumatism, right hand
    Billable
  113. M12.342
    Palindromic rheumatism, left hand
    Billable
  114. M12.349
    Palindromic rheumatism, unspecified hand
    Billable
  115. M12.35
    Palindromic rheumatism, hip
    Header
  116. M12.351
    Palindromic rheumatism, right hip
    Billable
  117. M12.352
    Palindromic rheumatism, left hip
    Billable
  118. M12.359
    Palindromic rheumatism, unspecified hip
    Billable
  119. M12.36
    Palindromic rheumatism, knee
    Header
  120. M12.361
    Palindromic rheumatism, right knee
    Billable
  121. M12.362
    Palindromic rheumatism, left knee
    Billable
  122. M12.369
    Palindromic rheumatism, unspecified knee
    Billable
  123. M12.37
    Palindromic rheumatism, ankle and foot
    Header
  124. M12.371
    Palindromic rheumatism, right ankle and foot
    Billable
  125. M12.372
    Palindromic rheumatism, left ankle and foot
    Billable
  126. M12.379
    Palindromic rheumatism, unspecified ankle and foot
    Billable
  127. M12.38
    Palindromic rheumatism, other specified site
    Billable
    Inclusion terms 1

    Inclusion terms

    • Palindromic rheumatism, vertebrae
  128. M12.39
    Palindromic rheumatism, multiple sites
    Billable
  129. M12.4
    Intermittent hydrarthrosis
    Header
  130. M12.40
    Intermittent hydrarthrosis, unspecified site
    Billable
  131. M12.41
    Intermittent hydrarthrosis, shoulder
    Header
  132. M12.411
    Intermittent hydrarthrosis, right shoulder
    Billable
  133. M12.412
    Intermittent hydrarthrosis, left shoulder
    Billable
  134. M12.419
    Intermittent hydrarthrosis, unspecified shoulder
    Billable
  135. M12.42
    Intermittent hydrarthrosis, elbow
    Header
  136. M12.421
    Intermittent hydrarthrosis, right elbow
    Billable
  137. M12.422
    Intermittent hydrarthrosis, left elbow
    Billable
  138. M12.429
    Intermittent hydrarthrosis, unspecified elbow
    Billable
  139. M12.43
    Intermittent hydrarthrosis, wrist
    Header
  140. M12.431
    Intermittent hydrarthrosis, right wrist
    Billable
  141. M12.432
    Intermittent hydrarthrosis, left wrist
    Billable
  142. M12.439
    Intermittent hydrarthrosis, unspecified wrist
    Billable
  143. M12.44
    Intermittent hydrarthrosis, hand
    Header
  144. M12.441
    Intermittent hydrarthrosis, right hand
    Billable
  145. M12.442
    Intermittent hydrarthrosis, left hand
    Billable
  146. M12.449
    Intermittent hydrarthrosis, unspecified hand
    Billable
  147. M12.45
    Intermittent hydrarthrosis, hip
    Header
  148. M12.451
    Intermittent hydrarthrosis, right hip
    Billable
  149. M12.452
    Intermittent hydrarthrosis, left hip
    Billable
  150. M12.459
    Intermittent hydrarthrosis, unspecified hip
    Billable
  151. M12.46
    Intermittent hydrarthrosis, knee
    Header
  152. M12.461
    Intermittent hydrarthrosis, right knee
    Billable
  153. M12.462
    Intermittent hydrarthrosis, left knee
    Billable
  154. M12.469
    Intermittent hydrarthrosis, unspecified knee
    Billable
  155. M12.47
    Intermittent hydrarthrosis, ankle and foot
    Header
  156. M12.471
    Intermittent hydrarthrosis, right ankle and foot
    Billable
  157. M12.472
    Intermittent hydrarthrosis, left ankle and foot
    Billable
  158. M12.479
    Intermittent hydrarthrosis, unspecified ankle and foot
    Billable
  159. M12.48
    Intermittent hydrarthrosis, other site
    Billable
  160. M12.49
    Intermittent hydrarthrosis, multiple sites
    Billable
  161. M12.5
    Traumatic arthropathy
    Header
    Excludes1 6

    Excludes1

    • current injury-see Alphabetic Index
    • post-traumatic osteoarthritis of first carpometacarpal joint (M18.2-M18.3) M18.2 M18.3
    • post-traumatic osteoarthritis of hip (M16.4-M16.5) M16.4 M16.5
    • post-traumatic osteoarthritis of knee (M17.2-M17.3) M17.2 M17.3
    • post-traumatic osteoarthritis NOS (M19.1-) M19.1
    • post-traumatic osteoarthritis of other single joints (M19.1-) M19.1
  162. M12.50
    Traumatic arthropathy, unspecified site
    Billable
  163. M12.51
    Traumatic arthropathy, shoulder
    Header
  164. M12.511
    Traumatic arthropathy, right shoulder
    Billable
  165. M12.512
    Traumatic arthropathy, left shoulder
    Billable
  166. M12.519
    Traumatic arthropathy, unspecified shoulder
    Billable
  167. M12.52
    Traumatic arthropathy, elbow
    Header
  168. M12.521
    Traumatic arthropathy, right elbow
    Billable
  169. M12.522
    Traumatic arthropathy, left elbow
    Billable
  170. M12.529
    Traumatic arthropathy, unspecified elbow
    Billable
  171. M12.53
    Traumatic arthropathy, wrist
    Header
  172. M12.531
    Traumatic arthropathy, right wrist
    Billable
  173. M12.532
    Traumatic arthropathy, left wrist
    Billable
  174. M12.539
    Traumatic arthropathy, unspecified wrist
    Billable
  175. M12.54
    Traumatic arthropathy, hand
    Header
  176. M12.541
    Traumatic arthropathy, right hand
    Billable
  177. M12.542
    Traumatic arthropathy, left hand
    Billable
  178. M12.549
    Traumatic arthropathy, unspecified hand
    Billable
  179. M12.55
    Traumatic arthropathy, hip
    Header
  180. M12.551
    Traumatic arthropathy, right hip
    Billable
  181. M12.552
    Traumatic arthropathy, left hip
    Billable
  182. M12.559
    Traumatic arthropathy, unspecified hip
    Billable
  183. M12.56
    Traumatic arthropathy, knee
    Header
  184. M12.561
    Traumatic arthropathy, right knee
    Billable
  185. M12.562
    Traumatic arthropathy, left knee
    Billable
  186. M12.569
    Traumatic arthropathy, unspecified knee
    Billable
  187. M12.57
    Traumatic arthropathy, ankle and foot
    Header
  188. M12.571
    Traumatic arthropathy, right ankle and foot
    Billable
  189. M12.572
    Traumatic arthropathy, left ankle and foot
    Billable
  190. M12.579
    Traumatic arthropathy, unspecified ankle and foot
    Billable
  191. M12.58
    Traumatic arthropathy, other specified site
    Billable
    Inclusion terms 1

    Inclusion terms

    • Traumatic arthropathy, vertebrae
  192. M12.59
    Traumatic arthropathy, multiple sites
    Billable
  193. M12.8
    Other specific arthropathies, not elsewhere classified
    Header
    Inclusion terms 1

    Inclusion terms

    • Transient arthropathy
  194. M12.80
    Other specific arthropathies, not elsewhere classified, unspecified site
    Billable
  195. M12.81
    Other specific arthropathies, not elsewhere classified, shoulder
    Header
  196. M12.811
    Other specific arthropathies, not elsewhere classified, right shoulder
    Billable
  197. M12.812
    Other specific arthropathies, not elsewhere classified, left shoulder
    Billable
  198. M12.819
    Other specific arthropathies, not elsewhere classified, unspecified shoulder
    Billable
  199. M12.82
    Other specific arthropathies, not elsewhere classified, elbow
    Header
  200. M12.821
    Other specific arthropathies, not elsewhere classified, right elbow
    Billable
  201. M12.822
    Other specific arthropathies, not elsewhere classified, left elbow
    Billable
  202. M12.829
    Other specific arthropathies, not elsewhere classified, unspecified elbow
    Billable
  203. M12.83
    Other specific arthropathies, not elsewhere classified, wrist
    Header
  204. M12.831
    Other specific arthropathies, not elsewhere classified, right wrist
    Billable
  205. M12.832
    Other specific arthropathies, not elsewhere classified, left wrist
    Billable
  206. M12.839
    Other specific arthropathies, not elsewhere classified, unspecified wrist
    Billable
  207. M12.84
    Other specific arthropathies, not elsewhere classified, hand
    Header
  208. M12.841
    Other specific arthropathies, not elsewhere classified, right hand
    Billable
  209. M12.842
    Other specific arthropathies, not elsewhere classified, left hand
    Billable
  210. M12.849
    Other specific arthropathies, not elsewhere classified, unspecified hand
    Billable
  211. M12.85
    Other specific arthropathies, not elsewhere classified, hip
    Header
  212. M12.851
    Other specific arthropathies, not elsewhere classified, right hip
    Billable
  213. M12.852
    Other specific arthropathies, not elsewhere classified, left hip
    Billable
  214. M12.859
    Other specific arthropathies, not elsewhere classified, unspecified hip
    Billable
  215. M12.86
    Other specific arthropathies, not elsewhere classified, knee
    Header
  216. M12.861
    Other specific arthropathies, not elsewhere classified, right knee
    Billable
  217. M12.862
    Other specific arthropathies, not elsewhere classified, left knee
    Billable
  218. M12.869
    Other specific arthropathies, not elsewhere classified, unspecified knee
    Billable
  219. M12.87
    Other specific arthropathies, not elsewhere classified, ankle and foot
    Header
  220. M12.871
    Other specific arthropathies, not elsewhere classified, right ankle and foot
    Billable
  221. M12.872
    Other specific arthropathies, not elsewhere classified, left ankle and foot
    Billable
  222. M12.879
    Other specific arthropathies, not elsewhere classified, unspecified ankle and foot
    Billable
  223. M12.88
    Other specific arthropathies, not elsewhere classified, other specified site
    Billable
    Inclusion terms 1

    Inclusion terms

    • Other specific arthropathies, not elsewhere classified, vertebrae
  224. M12.89
    Other specific arthropathies, not elsewhere classified, multiple sites
    Billable
  225. M12.9
    Arthropathy, unspecified
    Billable

Sources of each column.

Instructions

At M12

Excludes1

  • arthrosis (M15-M19) M15 M19
  • cricoarytenoid arthropathy (J38.7) J38.7

Notes that also apply

Instructions for the group M00-M25 (Includes 1): printed on the chapter 13 page.

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

Index entries

  • Clutton's joints → A50.51 [M12.80]
  • Arthropathy → M12.9
  • Arthropathypostinfectious NEC → B99 [M12.80]
  • Arthropathypostrheumatic, chronic (Jaccoud) → M12.00
  • Disease, diseasedKaschin-Beck (endemic polyarthritis) → M12.10
  • Synovitisvillonodular (pigmented) → M12.2-
  • Rheumatism (articular) (neuralgic) (nonarticular)palindromic (any site) → M12.30
  • Hydrarthrosisintermittent → M12.40
  • Arthropathytraumatic → M12.50
  • Arthropathyspecified form NEC → M12.80
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)syphilitic (late)congenital → A50.55 [M12.80]
  • Hydrarthrosissyphilitic (late)congenital → A50.55 [M12.80]
  • Arthropathyin (due to)viral hepatitis (postinfectious) NEC → B19.9 [M12.80]
  • Arthropathyin (due to)infective endocarditis → I33.0 [M12.80]
  • Arthropathypostrheumatic, chronic (Jaccoud)shoulder → M12.01-
  • Arthropathypostrheumatic, chronic (Jaccoud)elbow → M12.02-
  • Arthropathypostrheumatic, chronic (Jaccoud)wrist → M12.03-
  • Arthropathypostrheumatic, chronic (Jaccoud)hand joint → M12.04-
  • Arthropathypostrheumatic, chronic (Jaccoud)hip → M12.05-
  • Arthropathypostrheumatic, chronic (Jaccoud)knee → M12.06-
  • Arthropathypostrheumatic, chronic (Jaccoud)ankle → M12.07-
  • Arthropathypostrheumatic, chronic (Jaccoud)foot joint → M12.07-
  • Arthropathypostrheumatic, chronic (Jaccoud)specified joint NEC → M12.08
  • Arthropathypostrheumatic, chronic (Jaccoud)vertebrae → M12.08
  • Arthropathypostrheumatic, chronic (Jaccoud)multiple site → M12.09
  • Disease, diseasedKaschin-Beck (endemic polyarthritis)shoulder → M12.11-
  • Disease, diseasedKaschin-Beck (endemic polyarthritis)elbow → M12.12-
  • Disease, diseasedKaschin-Beck (endemic polyarthritis)wrist → M12.13-
  • Disease, diseasedKaschin-Beck (endemic polyarthritis)hand joint → M12.14-
  • Disease, diseasedKaschin-Beck (endemic polyarthritis)hip → M12.15-
  • Disease, diseasedKaschin-Beck (endemic polyarthritis)knee → M12.16-
  • Disease, diseasedKaschin-Beck (endemic polyarthritis)ankle → M12.17-
  • Disease, diseasedKaschin-Beck (endemic polyarthritis)foot joint → M12.17-
  • Disease, diseasedKaschin-Beck (endemic polyarthritis)vertebra → M12.18
  • Disease, diseasedKaschin-Beck (endemic polyarthritis)multiple site → M12.19
  • Synovitisvillonodular (pigmented)shoulder → M12.21-
  • Synovitisvillonodular (pigmented)elbow → M12.22-
  • Synovitisvillonodular (pigmented)wrist → M12.23-
  • Synovitisvillonodular (pigmented)hand joint → M12.24-
  • Synovitisvillonodular (pigmented)hip → M12.25-

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

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

Hierarchy