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ICD-10-CM 2027 diagnosis code

S86.01Strain of Achilles tendon

Not billable — use a more specific codeRequires 7th character

S86.01 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S86.01

S86.01 is the ICD-10-CM diagnosis code for strain of Achilles tendon. It belongs to category S86 (injury of muscle, fascia and tendon at lower leg level), block S80-S89 (injuries to the knee and lower leg) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within S86.0 (injury of Achilles tendon), S86.01 is specifically for strain of Achilles tendon. Related codes cover unspecified injury of Achilles tendon (S86.00), laceration of Achilles tendon (S86.02) and other specified injury of Achilles tendon (S86.09).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category S86

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to S86.01.

› From S86 Injury of muscle, fascia and tendon at lower leg level
Excludes2
  • injury of muscle, fascia and tendon at ankle (S96.-)
  • injury of patellar ligament (tendon) (S76.1-)
  • sprain of joints and ligaments of knee (S83.-)
Code also
  • any associated open wound (S81.-)

Broader instructions also apply from S80-S89 Injuries to the knee and lower leg and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to S86.01.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about S86.01

Is S86.01 billable?

No. S86.01 is a header code. Report one of its more specific subcodes instead.