Place of Service Codes in Behavioral Health Billing

Apr 19
2 min read

Center for Medicare and Medicaid Services (CMS) Place of Service Codes:

What Are Place of Service Codes

Place of Service codes are two-digit codes used on professional claims to indicate where a service was delivered. (Centers for Medicare & Medicaid Services)

They are maintained by the Centers for Medicare & Medicaid Services and are required under HIPAA standard transactions for claims submission. (Centers for Medicare & Medicaid Services)

Each code corresponds to a specific care setting such as an office, hospital, or patient’s home.

Why POS Codes Matter

POS codes are not administrative filler. They directly affect:

Reimbursement rates
Claim acceptance vs. denial
Audit risk and compliance exposure

Payers use POS codes to verify that the service billed aligns with the clinical setting in documentation.

Where POS Codes Are Used

POS codes are reported on:

CMS-1500 (professional claims)
837P electronic claims

They are entered in Box 24B on the CMS-1500 form.

Common POS Codes in Behavioral Health

While CMS maintains a full code set, a small subset drives most behavioral health billing:

11 – Office Standard outpatient therapy sessions
10 – Telehealth Provided in Patient’s Home Virtual services where the patient is at home
02 – Telehealth Provided Other than in Patient’s Home Virtual care where the patient is in another facility
03- School

Telehealth: Where Errors Concentrate

Telehealth has introduced the highest rate of POS errors.

Key distinction:

POS 10 = patient at home
POS 02 = patient not at home

Compliance and Payer Variability

CMS defines the code set, but payers interpret and reimburse differently.

Providers must:

Verify payer-specific POS requirements
Align POS coding with credentialing and contract terms
Monitor updates to CMS code sets

CMS updates the POS list regularly, and using outdated codes creates avoidable risk. (Centers for Medicare & Medicaid Services)