Question 1

What is ICD-10 code M87.04?

Accepted Answer

M87.04 is the ICD-10-CM diagnosis code for idiopathic aseptic necrosis of hand and fingers. M87.04 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering other osteopathies (m86-m90).

Header codes like M87.04 cannot be reported on claims directly; they organize child codes that share clinical context. Coders should select the billable child code that matches the documented presentation and then verify its current source-backed HCC mapping. Do not infer a child code or risk adjustment value from the header alone.

Question 2

Is M87.04 an HCC code?

Accepted Answer

M87.04 is a non-billable header code. Choose the billable child code supported by the documentation, then check that child's current V28 mapping.

Question 3

Is M87.04 billable?

Accepted Answer

No. M87.04 is a header (non-billable) ICD-10-CM code. Header codes sit at a higher level of the diagnosis hierarchy and exist to organize a family of more specific child codes. Per ICD-10-CM coding guidelines, a header code cannot be reported on a claim as the diagnosis, coders must select a billable child code from the M87.04 hierarchy that matches the highest level of specificity supported by the provider's documentation. Payers reject header codes submitted as the primary diagnosis.

Question 4

Which HCC does M87.04 map to under V28?

Accepted Answer

M87.04 is not billable. Choose a billable child code before checking its V28 mapping.

Question 5

What RAF reference is published for M87.04?

Accepted Answer

M87.04 is not billable. Choose a billable child code before checking a V28 reference coefficient.

Question 6

What is the V28 vs V24 difference for M87.04?

Accepted Answer

M87.04 is not billable. Choose a billable child code before comparing V28 with a historical V24 reference.

Question 7

What documentation supports M87.04?

Accepted Answer

M87.04 is not billable. Choose the supported billable child code before checking mapping or documentation requirements.

HCC Buddy Code Card

M87.04

Get the V28 mapping + MEAT cheat sheet

What This Code Means

Child Codes

Code Hierarchy

Work M87.04 in HCC Buddy

M87.04 ICD-10-CM Code: Idiopathic aseptic necrosis of hand and fingers