Z89.442

Z89.442: Acquired absence of left ankle

Billable / specific codeICD-10-CMPOA exemptleft

Z89.442 is a billable, specific ICD-10-CM code for acquired absence of left ankle. It is valid for submission on a claim.

Check Z89.442 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above Z89.442

A category’s note binds every code beneath it.

Written on Z89: Acquired absence of limb

acquired deformities of limbs (M20-M21)
congenital absence of limbs (Q71-Q73)

Other codes that can never be billed with Z89.442

Their own Excludes1 notes name this code, so the conflict is not listed above.

M20Acquired deformities of fingers and toes
M21Other acquired deformities of limbs

Risk adjustment

Z89.442 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 409 Amputation Status, Lower Limb/Amputation Complications0.598 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

Z89.442 is named in 3 Medicare coverage policies: 3 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A53058Billing and Coding: Home Health Physical Therapy
A53065Billing and Coding: Outpatient Physical Therapy
A57311Billing and Coding: Physical Therapy - Home Health

Code history

Unchanged in every release from FY2024 to FY2027.