I82.5Z1 — Chronic embolism and thrombosis of unspecified deep veins of right distal lower extremity
Is I82.5Z1 billable?
Yes, but I82.5Z1 is an unspecified code. I82.5Z1 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, I82.5Z1 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting I82.5Z1 — the more specific alternatives are listed below.
More specific alternatives
I82.5Z1 at a glance
| Code | I82.5Z1 |
|---|---|
| Description | Chronic embolism and thrombosis of unspecified deep veins of right distal lower extremity |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does I82.5Z1 group to?
I82.5Z1 sits in MDC 05 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 299Peripheral Vascular Disorders with MCCmedical
- 300Peripheral Vascular Disorders with CCmedical
- 301Peripheral Vascular Disorders without CC/MCCmedical
As a secondary diagnosis, I82.5Z1 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is I82.5Z1 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under I82.5Z, the nearest indexed parent of I82.5Z1. Use them to find the family, then select the specific code.
- Embolism › vein › deep › calf › chronic (multiple) (paradoxical)
- Embolism › vein › deep › lower leg › chronic (multiple) (paradoxical)
- Thrombosis, thrombotic › vein › deep › calf › chronic (bland) (multiple) (progressive) (silent) (vessel)
- Thrombosis, thrombotic › vein › deep › lower leg › chronic (bland) (multiple) (progressive) (silent) (vessel)
Excludes1 — never code together — inherited from I82.5
The conditions below can never be reported together with I82.5Z1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- personal history of venous embolism and thrombosis (Z86.718)
Code first — inherited from I82
The underlying condition below must be sequenced before I82.5Z1. I82.5Z1 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from I82.5
Report an additional code alongside I82.5Z1 to fully describe the condition. I82.5Z1 is sequenced first.
- code, if applicable, for associated long-term (current) use of anticoagulants (Z79.01)
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I82.5Z1, but a patient may have both at the same time. When documentation supports it, I82.5Z1 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
Excludes2 — not included here — inherited from I82
The conditions below are not part of I82.5Z1, but a patient may have both at the same time. When documentation supports it, I82.5Z1 and the excluded code may both be reported.
How long has I82.5Z1 existed?
I82.5Z1 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.