2019 ICD-10-CM Diagnosis Code M85.2

Hyperostosis of skull

    2016 2017 2018 2019 Billable/Specific Code
  • M85.2 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM M85.2 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of M85.2 - other international versions of ICD-10 M85.2 may differ.
The following code(s) above M85.2 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to M85.2:
  • M00-M99
    2019 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
    Type 2 Excludes
    • arthropathic psoriasis (L40.5-)
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • compartment syndrome (traumatic) (T79.A-)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the musculoskeletal system and connective tissue
  • M85
    ICD-10-CM Diagnosis Code M85

    Other disorders of bone density and structure

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • osteogenesis imperfecta (Q78.0)
    • osteopetrosis (Q78.2)
    • osteopoikilosis (Q78.8)
    • polyostotic fibrous dysplasia (Q78.1)
    Other disorders of bone density and structure
ICD-10-CM M85.2 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 564 Other musculoskeletal system and connective tissue diagnoses with mcc
  • 565 Other musculoskeletal system and connective tissue diagnoses with cc
  • 566 Other musculoskeletal system and connective tissue diagnoses without cc/mcc

Convert M85.2 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change

Diagnosis Index entries containing back-references to M85.2:
  • Buchem's syndrome M85.2 (hyperostosis corticalis)
  • Craniopathy, metabolic M85.2
  • Disease, diseased - see also Syndrome
    • Morgagni's M85.2 (syndrome) (hyperostosis frontalis interna)
  • Disorder (of) - see also Disease
    • bone M89.9
      ICD-10-CM Diagnosis Code M89.9

      Disorder of bone, unspecified

        2016 2017 2018 2019 Billable/Specific Code
      • density and structure M85.9
        ICD-10-CM Diagnosis Code M85.9

        Disorder of bone density and structure, unspecified

          2016 2017 2018 2019 Billable/Specific Code
        • hyperostosis of skull M85.2
  • Hyperostosis (monomelic) - see also Disorder, bone, density and structure, specified NEC
    • cortical (skull) M85.2
    • skull M85.2
    • frontal, internal of skull M85.2
    • interna frontalis M85.2
  • Leontiasis
    • ossium M85.2
  • Morel M85.2 (-Stewart)(-Morgagni)
  • Morel-Moore syndrome M85.2
  • Morgagni's
    • syndrome M85.2
  • Morgagni-Stewart-Morel syndrome M85.2
  • Stewart-Morel syndrome M85.2
  • Syndrome - see also Disease
    • Buchem's M85.2
    • Morel-Moore M85.2
    • Morel-Morgagni M85.2
    • Morgagni M85.2 (-Morel) (-Stewart)
    • Stewart-Morel M85.2
    • van Buchem's M85.2
  • Van Buchem's syndrome M85.2

ICD-10-CM Codes Adjacent To M85.2
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 …… other site
M85.19 …… multiple sites
M85.2 Hyperostosis of skull
M85.3 Osteitis condensans
M85.30 …… 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

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.