ICD-10-CM Codes
S00-T88 Injury, poisoning and certain other consequences of external causes
S60-S69 Injuries to the wrist, hand and fingers
S66- Injury of muscle, fascia and tendon at wrist and hand level

2018/2019 ICD-10-CM Diagnosis Code S66.399

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

2016

2017

2018

2019

Non-Billable/Non-Specific Code

S66.399 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
Short description: Inj extensor musc/fasc/tend unsp finger at wrs/hnd lv
The 2018/2019 edition of ICD-10-CM S66.399 became effective on October 1, 2018.
This is the American ICD-10-CM version of S66.399 - other international versions of ICD-10 S66.399 may differ.

The following code(s) above S66.399 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to S66.399:

S00-T88
2019 ICD-10-CM Range S00-T88
Injury, poisoning and certain other consequences of external causes
Note
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
Type 1 Excludes
- birth trauma (P10-P15)
- obstetric trauma (O70-O71)
Use Additional
- code to identify any retained foreign body, if applicable (Z18.-)
Injury, poisoning and certain other consequences of external causes
S60-S69
2019 ICD-10-CM Range S60-S69
Injuries to the wrist, hand and fingers
Type 2 Excludes
- burns and corrosions (T20-T32)
- frostbite (T33-T34)
- insect bite or sting, venomous (T63.4)
Injuries to the wrist, hand and fingers
S66
ICD-10-CM Diagnosis Code S66
Injury of muscle, fascia and tendon at wrist and hand level
Code Also
- any associated open wound (S61.-)
Type 2 Excludes
- sprain of joints and ligaments of wrist and hand (S63.-)
Injury of muscle, fascia and tendon at wrist and hand level
S66.3
ICD-10-CM Diagnosis Code S66.3
Injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
Type 2 Excludes
- Injury of extensor muscle, fascia and tendon of thumb at wrist and hand level (S66.2-)
Injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change

Diagnosis Index entries containing back-references to S66.399:

Injury T14.90
- see also specified injury type
ICD-10-CM Diagnosis Code T14.90
Injury, unspecified
Applicable To
Injury NOS
- muscle (and fascia) (and tendon)
  - finger
    - extensor (forearm level) S56.40-
      ICD-10-CM Diagnosis Code S56.40-
      Unspecified injury of extensor muscle, fascia and tendon of other and unspecified finger at forearm level
      2016 2017 2018 2019 Non-Billable/Non-Specific Code
      - hand level S66.309
        ICD-10-CM Diagnosis Code S66.309
        Unspecified injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level
        2016 2017 2018 2019 Non-Billable/Non-Specific Code
        specified type NEC S66.399

ICD-10-CM Codes Adjacent To S66.399

S66.396D …… subsequent encounter

S66.396S …… sequela

S66.397 Other injury of extensor muscle, fascia and tendon of left little finger at wrist and hand level

S66.397A …… initial encounter

S66.397D …… subsequent encounter

S66.397S …… sequela

S66.398 Other injury of extensor muscle, fascia and tendon of other finger at wrist and hand level

S66.398A …… initial encounter

S66.398D …… subsequent encounter

S66.398S …… sequela

S66.399 Other injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level

S66.399A …… initial encounter

S66.399D …… subsequent encounter

S66.399S …… sequela

S66.4 Injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level

S66.40 Unspecified injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level

S66.401 Unspecified injury of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level

S66.401A …… initial encounter

S66.401D …… subsequent encounter

S66.401S …… sequela

S66.402 Unspecified injury of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2018/2019 ICD-10-CM Diagnosis Code S66.399

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

Injury, poisoning and certain other consequences of external causes

Injuries to the wrist, hand and fingers

Injury of muscle, fascia and tendon at wrist and hand level

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

Injury, unspecified

Unspecified injury of extensor muscle, fascia and tendon of other and unspecified finger at forearm level

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