MCMCB Pro
S64.490D

S64.490DInjury of digital nerve of right index finger, subsequent encounter

Billable / specific codeICD-10-CMPOA exemptright

S64.490D is a billable, specific ICD-10-CM code for injury of digital nerve of right index finger, subsequent encounter. It is valid for submission on a claim.

7th character "D" — subsequent encounter

The appropriate 7th character is to be added to each code from category S64

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

S64.490D 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.

Medicare coverage

S64.490D is named in 9 Medicare coverage policies 9 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A53065Billing and Coding: Outpatient Physical Therapy
  • A54095Billing and Coding: Nerve Conduction Studies and Electromyography
  • A54969Billing and Coding: Nerve Conduction Studies and Electromyography
  • A56034Billing and Coding: Nerve Blockade for Treatment of Chronic Pain and Neuropathy

Related codes at this level

Codes that share S64.490. If S64.490D is not quite right, the correct code is usually one of these.

Questions about S64.490D

Is S64.490D a billable ICD-10-CM code?
Yes. S64.490D is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S64.490D sit in the tabular list?
Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the wrist, hand and fingers (S60-S69).
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.