Chapter 19

S00–T88: Injury, Poisoning and Certain Other Consequences of External Causes

Injury, Poisoning and Certain Other Consequences of External Causes diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
Use Additional Code
  • code to identify any retained foreign body, if applicable (Z18.-)
Internal Codes
  • S66.305

    Unspecified injury of extensor muscle, fascia and tendon of left ring finger at wrist and hand level

  • S66.305A

    Unspecified injury of extensor muscle, fascia and tendon of left ring finger at wrist and hand level, initial encounter

  • S66.305D

    Unspecified injury of extensor muscle, fascia and tendon of left ring finger at wrist and hand level, subsequent encounter

  • S66.305S

    Unspecified injury of extensor muscle, fascia and tendon of left ring finger at wrist and hand level, sequela

  • S66.306

    Unspecified injury of extensor muscle, fascia and tendon of right little finger at wrist and hand level

  • S66.306A

    Unspecified injury of extensor muscle, fascia and tendon of right little finger at wrist and hand level, initial encounter

  • S66.306D

    Unspecified injury of extensor muscle, fascia and tendon of right little finger at wrist and hand level, subsequent encounter

  • S66.306S

    Unspecified injury of extensor muscle, fascia and tendon of right little finger at wrist and hand level, sequela

  • S66.307

    Unspecified injury of extensor muscle, fascia and tendon of left little finger at wrist and hand level

  • S66.307A

    Unspecified injury of extensor muscle, fascia and tendon of left little finger at wrist and hand level, initial encounter

  • S66.307D

    Unspecified injury of extensor muscle, fascia and tendon of left little finger at wrist and hand level, subsequent encounter

  • S66.307S

    Unspecified injury of extensor muscle, fascia and tendon of left little finger at wrist and hand level, sequela

  • S66.308

    Unspecified injury of extensor muscle, fascia and tendon of other finger at wrist and hand level

  • S66.308A

    Unspecified injury of extensor muscle, fascia and tendon of other finger at wrist and hand level, initial encounter

  • S66.308D

    Unspecified injury of extensor muscle, fascia and tendon of other finger at wrist and hand level, subsequent encounter

  • S66.308S

    Unspecified injury of extensor muscle, fascia and tendon of other finger at wrist and hand level, sequela

  • S66.309

    Unspecified injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level

  • S66.309A

    Unspecified injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level, initial encounter

  • S66.309D

    Unspecified injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level, subsequent encounter

  • S66.309S

    Unspecified injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level, sequela

  • S66.31

    Strain of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level

  • S66.310

    Strain of extensor muscle, fascia and tendon of right index finger at wrist and hand level

  • S66.310A

    Strain of extensor muscle, fascia and tendon of right index finger at wrist and hand level, initial encounter

  • S66.310D

    Strain of extensor muscle, fascia and tendon of right index finger at wrist and hand level, subsequent encounter

  • S66.310S

    Strain of extensor muscle, fascia and tendon of right index finger at wrist and hand level, sequela

  • S66.311

    Strain of extensor muscle, fascia and tendon of left index finger at wrist and hand level

  • S66.311A

    Strain of extensor muscle, fascia and tendon of left index finger at wrist and hand level, initial encounter

  • S66.311D

    Strain of extensor muscle, fascia and tendon of left index finger at wrist and hand level, subsequent encounter

  • S66.311S

    Strain of extensor muscle, fascia and tendon of left index finger at wrist and hand level, sequela

  • S66.312

    Strain of extensor muscle, fascia and tendon of right middle finger at wrist and hand level

  • S66.312A

    Strain of extensor muscle, fascia and tendon of right middle finger at wrist and hand level, initial encounter

  • S66.312D

    Strain of extensor muscle, fascia and tendon of right middle finger at wrist and hand level, subsequent encounter

  • S66.312S

    Strain of extensor muscle, fascia and tendon of right middle finger at wrist and hand level, sequela

  • S66.313

    Strain of extensor muscle, fascia and tendon of left middle finger at wrist and hand level

  • S66.313A

    Strain of extensor muscle, fascia and tendon of left middle finger at wrist and hand level, initial encounter

  • S66.313D

    Strain of extensor muscle, fascia and tendon of left middle finger at wrist and hand level, subsequent encounter

  • S66.313S

    Strain of extensor muscle, fascia and tendon of left middle finger at wrist and hand level, sequela

  • S66.314

    Strain of extensor muscle, fascia and tendon of right ring finger at wrist and hand level

  • S66.314A

    Strain of extensor muscle, fascia and tendon of right ring finger at wrist and hand level, initial encounter

  • S66.314D

    Strain of extensor muscle, fascia and tendon of right ring finger at wrist and hand level, subsequent encounter

  • S66.314S

    Strain of extensor muscle, fascia and tendon of right ring finger at wrist and hand level, sequela

  • S66.315

    Strain of extensor muscle, fascia and tendon of left ring finger at wrist and hand level

  • S66.315A

    Strain of extensor muscle, fascia and tendon of left ring finger at wrist and hand level, initial encounter

  • S66.315D

    Strain of extensor muscle, fascia and tendon of left ring finger at wrist and hand level, subsequent encounter

  • S66.315S

    Strain of extensor muscle, fascia and tendon of left ring finger at wrist and hand level, sequela

  • S66.316

    Strain of extensor muscle, fascia and tendon of right little finger at wrist and hand level

  • S66.316A

    Strain of extensor muscle, fascia and tendon of right little finger at wrist and hand level, initial encounter

  • S66.316D

    Strain of extensor muscle, fascia and tendon of right little finger at wrist and hand level, subsequent encounter

  • S66.316S

    Strain of extensor muscle, fascia and tendon of right little finger at wrist and hand level, sequela

  • S66.317

    Strain of extensor muscle, fascia and tendon of left little finger at wrist and hand level

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