M66.839 is the authoritative medical code for Spontaneous rupture of other tendons, unspecified forearm. This classification is used in medical billing and clinical recording to specify the clinical criteria for spontaneous rupture of other tendons, unspecified forearm (ICD-10-CM M66.839), ensuring healthcare documentation aligns with current federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Spontaneous rupture of other tendons, unspecified forearm is a billable ICD-10-CM diagnosis code M66.839. Includes: rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength. Excludes2 (not included here): rotator cuff syndrome M75.1-; rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for M66.839 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- rotator cuff syndrome M75.1-
- rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region
Frequently Asked Questions (FAQ) & Clinical Guidance
Can M66.839 be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, M66.839 and the following are not considered part of each other and may both be reported when both conditions are present: rotator cuff syndrome (M75.1-); rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to M66.839 in its code family, with their registry titles.
- M66.173 — Rupture of synovium, unspecified ankle
- M66.174 — Rupture of synovium, right foot
- M66.175 — Rupture of synovium, left foot
- M66.176 — Rupture of synovium, unspecified foot
- M66.177 — Rupture of synovium, right toe(s)
- M66.178 — Rupture of synovium, left toe(s)
- M66.179 — Rupture of synovium, unspecified toe(s)
- M66.18 — Rupture of synovium, other site
- M66.2 — Spontaneous rupture of extensor tendons
- M66.20 — Spontaneous rupture of extensor tendons, unspecified site
View all 40 codes in the M66 family