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B88.9

B88.9Infestation, unspecified

Billable / specific codeICD-10-CM

B88.9 is a billable, specific ICD-10-CM code for infestation, unspecified. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Infestation (skin) NOS
  • Infestation by mites NOS
  • Skin parasites NOS

Risk adjustment

B88.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How B88.9 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to B88.9.

  • Infestation
  • Mite(s) (infestation)
  • Infestationmites
  • Infestationskin NOS
  • Parasitismskin
  • Disease, diseasedparasiticskin NOS
  • Infestationparasite, parasiticskin

Related codes at this level

Codes that share B88. If B88.9 is not quite right, the correct code is usually one of these.

Questions about B88.9

Is B88.9 a billable ICD-10-CM code?
Yes. B88.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does B88.9 sit in the tabular list?
Certain infectious and parasitic diseases (A00-B99), in the block Pediculosis, acariasis and other infestations (B85-B89).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.