ICD-10-CM Coding for Idiopathic Palmar Eccrine Hidradenitis and Neutrophilic Eccrine Hidradenitis
For idiopathic palmar eccrine hidradenitis (and palmoplantar eccrine hidradenitis), use ICD-10-CM code L74.8 (Other eccrine sweat disorders), with ICD-9-CM cross-walk code 705.89 (Other specified disorders of sweat glands).
Coding Rationale
The provided evidence does not contain specific ICD coding guidelines for these rare neutrophilic dermatoses. However, based on the clinical descriptions in the research literature and standard ICD-10-CM classification principles:
For Idiopathic Palmoplantar Eccrine Hidradenitis (IPPH):
- ICD-10-CM: L74.8 - "Other eccrine sweat disorders"
- ICD-9-CM: 705.89 - "Other specified disorders of sweat glands"
This condition is characterized by neutrophilic infiltrates around eccrine sweat glands in otherwise healthy children and young adults, typically affecting palms and soles 1, 2, 3, 4. The disorder involves the eccrine apparatus specifically and doesn't fit other more specific hidradenitis categories.
For Neutrophilic Eccrine Hidradenitis (NEH):
- ICD-10-CM: L74.8 - "Other eccrine sweat disorders"
- ICD-9-CM: 705.89 - "Other specified disorders of sweat glands"
NEH is a reactive neutrophilic dermatosis typically associated with malignancy or chemotherapy in adults, though idiopathic cases occur 5, 6. The histologic hallmark is dense neutrophilic infiltration around eccrine glands.
Important Coding Considerations
Do not confuse with hidradenitis suppurativa (HS), which has distinct ICD-10-CM codes:
- L73.2 for hidradenitis suppurativa
- This is a completely different chronic inflammatory condition affecting apocrine glands 7
Clinical documentation is critical because:
- These are rare diagnoses requiring histopathologic confirmation
- The distinction between idiopathic palmoplantar eccrine hidradenitis and neutrophilic eccrine hidradenitis may require documentation of associated conditions (malignancy, chemotherapy) or precipitating factors (physical activity in children)
- ICD-10-CM code specificity utilization remains suboptimal in ambulatory settings, with only 44.6% of available codes actually used 8
For billing and documentation purposes, ensure the medical record clearly states:
- Histopathologic confirmation of neutrophilic infiltrate around eccrine glands
- Location (palmar, plantar, or other sites)
- Associated conditions if present (malignancy, chemotherapy exposure)
- Whether idiopathic or secondary
The lack of more specific ICD-10-CM codes for these rare neutrophilic dermatoses reflects their uncommon occurrence and recent clinical recognition in the literature 1, 2, 3, 4.