L97.523 — Non-pressure chronic ulcer of other part of left foot with necrosis of muscle

Billable

Is L97.523 billable?

Yes — L97.523 is billable for FY2027. L97.523 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. L97.523 may be submitted for encounters from October 1, 2026 through September 30, 2027.

L97.523 at a glance

Code	L97.523
Description	Non-pressure chronic ulcer of other part of left foot with necrosis of muscle
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does L97.523 group to?

L97.523 sits in MDC 09 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.

573Skin Graft for Skin Ulcer or Cellulitis with MCCsurgical
574Skin Graft for Skin Ulcer or Cellulitis with CCsurgical
575Skin Graft for Skin Ulcer or Cellulitis without CC/MCCsurgical

How is L97.523 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to L97.523. They show the wording a clinician may have documented, which often differs from the Tabular description.

Ulcer, ulcerated, ulcerating, ulceration, ulcerative › lower limb › foot specified NEC › left › with › muscle necrosis
Ulcer, ulcerated, ulcerating, ulceration, ulcerative › lower limb › toe › left › with › muscle necrosis

Code first — inherited from L97

The underlying condition below must be sequenced before L97.523. L97.523 describes a manifestation and cannot be the principal or first-listed diagnosis.

any associated underlying condition, such as:
any associated gangrene (I96)
atherosclerosis of the lower extremities (I70.23-, I70.24-, I70.33-, I70.34-, I70.43-, I70.44-, I70.53-, I70.54-, I70.63-, I70.64-, I70.73-, I70.74-)
chronic venous hypertension (I87.31-, I87.33-)
diabetic ulcers (E08.621, E08.622, E09.621, E09.622, E10.621, E10.622, E11.621, E11.622, E13.621, E13.622)
postphlebitic syndrome (I87.01-, I87.03-)
postthrombotic syndrome (I87.01-, I87.03-)
varicose ulcer (I83.0-, I83.2-)

Excludes2 — not included here — inherited from Chapter 12

The conditions below are not part of L97.523, but a patient may have both at the same time. When documentation supports it, L97.523 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)
lipomelanotic reticulosis (I89.8)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
systemic connective tissue disorders (M30-M36)
viral warts (B07.-)

Excludes2 — not included here — inherited from L97

The conditions below are not part of L97.523, but a patient may have both at the same time. When documentation supports it, L97.523 and the excluded code may both be reported.

pressure ulcer (pressure area) (L89.-)
skin infections (L00-L08)
specific infections classified to A00-B99

How long has L97.523 existed?

L97.523 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.