G0158 - Occupational therapy assistant services in home health or hospice care (15-minute session)

Healthcare Common Procedure Coding System

Last updated: 3/24/2026

What is a HCPCS Code?

HCPCS (Healthcare Common Procedure Coding System) codes are used to identify medical procedures, supplies, and services for billing purposes. These codes help standardize how healthcare services are reported and billed across different providers and insurance companies.

Detailed Description

This code represents services provided by a qualified occupational therapist assistant who works under the supervision of a licensed occupational therapist. These services are delivered in your home or in a hospice setting and are billed in 15-minute increments. The assistant helps patients develop, recover, or maintain daily living and work skills through therapeutic activities and exercises. This might include helping with activities like dressing, cooking, bathing, or using adaptive equipment to improve independence and quality of life.

Additional Information

Services are billed per 15-minute increment. Multiple units may be billed for longer sessions. The assistant works under the direct supervision of a licensed occupational therapist who develops the treatment plan.

Category

Rehabilitation Services

Medical Specialty

Occupational Therapy

Expected Costs

Your actual cost will depend on your insurance coverage, provider location, and specific circumstances.

What's Required Before This

  • Physician referral for occupational therapy services
  • Patient must be homebound or in hospice care
  • Services must be supervised by licensed occupational therapist

What to Expect After

  • Progress monitoring by supervising occupational therapist
  • Regular reassessment of treatment goals
  • Coordination with other healthcare team members

Why Understanding This Code Matters

On Your Medical Bill

This code appears on your medical bills to identify the specific service, procedure, drug, or medical diagnosis you received. Understanding what it means helps you verify you're being charged correctly and know what to expect.

For Your Health

Knowing what this code represents helps you understand your treatment plan, ask better questions during appointments, and track your healthcare journey more effectively.

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