Summary & Overview
HCPCS M1122: Degenerative Neurological Condition Documentation
HCPCS Level II code M1122 documents that a patient has a degenerative neurological condition such as ALS, MS, or Parkinson's disease at any point before or during the episode of care. Nationally, consistent documentation of these conditions affects clinical planning, care coordination, and eligibility for specialty services and durable medical equipment. Clear use of this code supports appropriate care pathways for patients with progressive neurological disease.
Key payers included in this overview are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The analysis covers payer coverage considerations and coding application across ambulatory, home health, and neurology practice settings.
Readers will learn the clinical context and intended use of M1122, common service settings where the code is applied, and areas where documentation typically supports care decisions. Where available, the publication summarizes payer coverage patterns, common modifiers, and related documentation practices. Data not available in the input are noted where applicable. This resource is intended to clarify the purpose of M1122 for clinicians, billing staff, and policy analysts working at a national level.
Billing Code Overview
HCPCS Level II code M1122 documents that a patient has a diagnosis of a degenerative neurological condition such as amyotrophic lateral sclerosis (ALS), multiple sclerosis (MS), or Parkinson's disease diagnosed at any time before or during the episode of care. The code captures presence of a chronic, progressive neurological diagnosis relevant to care planning and service provision.
Service Type: Diagnostic documentation / Condition flagging
Typical Site of Service: Outpatient clinics, neurology practices, home health settings, and other ambulatory care environments
Data not available in the input for associated taxonomies, ICD-10 diagnoses, or related codes.
Clinical & Coding Specifications
Clinical Context
A home health or outpatient clinician documents that a patient has a degenerative neurological condition such as amyotrophic lateral sclerosis (ALS), multiple sclerosis (MS), or Parkinson disease that was diagnosed prior to or during the episode of care. Typical patient scenario: a 68-year-old patient with progressive gait instability and weakness established care with home health services after hospital discharge; the skilled nurse completes a comprehensive assessment and documents an existing diagnosis of G12.21 (amyotrophic lateral sclerosis) established two years prior. The documentation includes diagnostic history, symptom progression, durable medical equipment needs, and care plan goals addressing mobility, respiratory status, and medication management. Clinical workflow: intake clinician reviews medical records and provider notes to confirm the degenerative neurologic diagnosis; documents the diagnosis and supporting evidence in the episode chart; codes the condition on the plan of care; coordinates with physical therapy, occupational therapy, speech therapy, and respiratory therapy when indicated; updates progress notes during the episode to reflect changes in function or new complications; and finalizes the episode summary that references the confirmed degenerative neurologic diagnosis for billing and quality reporting purposes.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |