S56.319S ICD-10-CM Code: Strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, sequela
S56.319S is the authoritative medical code for Strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, sequela. This classification is used in medical billing and clinical recording to specify the clinical criteria for strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, sequela (ICD-10-CM S56.319S), ensuring healthcare documentation aligns with current federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Inpatient Payment Groups (MS-DRG)
MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.
- MS-DRG 562 — FRACTURE, SPRAIN, STRAIN AND DISLOCATION EXCEPT FEMUR, HIP, PELVIS AND THIGH WITH MCC (MDC 08)
- MS-DRG 563 — FRACTURE, SPRAIN, STRAIN AND DISLOCATION EXCEPT FEMUR, HIP, PELVIS AND THIGH WITHOUT MCC (MDC 08)
A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for S56.319S in the official ICD-10-CM tabular list.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- injury of muscle, fascia and tendon at or below wrist (S66.-)
- sprain of joints and ligaments of elbow (S53.4-)
- burns and corrosions (T20-T32)
- frostbite (T33-T34)
- injuries of wrist and hand (S60-S69)
- insect bite or sting, venomous (T63.4)
Code Also
Additional codes that may be required to fully describe the encounter.
- any associated open wound (S51.-)
Frequently Asked Questions (FAQ) & Clinical Guidance
Does S56.319S require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category S56.
Can S56.319S be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, S56.319S and the following are not considered part of each other and may both be reported when both conditions are present: injury of muscle, fascia and tendon at or below wrist (S66.-); sprain of joints and ligaments of elbow (S53.4-); burns and corrosions (T20-T32); frostbite (T33-T34).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to S56.319S in its code family, with their registry titles.
- S56.312D — Strain of extensor or abductor muscles, fascia and tendons of left thumb at forearm level, subsequent encounter
- S56.312S — Strain of extensor or abductor muscles, fascia and tendons of left thumb at forearm level, sequela
- S56.319 — Strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level
- S56.319A — Strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, initial encounter
- S56.319D — Strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, subsequent encounter
- S56.32 — Laceration of extensor or abductor muscles, fascia and tendons of thumb at forearm level
- S56.321 — Laceration of extensor or abductor muscles, fascia and tendons of right thumb at forearm level
- S56.321A — Laceration of extensor or abductor muscles, fascia and tendons of right thumb at forearm level, initial encounter
- S56.321D — Laceration of extensor or abductor muscles, fascia and tendons of right thumb at forearm level, subsequent encounter
- S56.321S — Laceration of extensor or abductor muscles, fascia and tendons of right thumb at forearm level, sequela