Billing for healthcare services is a complex process, and while many people are familiar with general medical billing, few are aware of the distinct differences when it comes to behavioral health billing. Behavioral health services such as therapy, counseling, and substance abuse treatment are often billed differently due to unique codes, insurance requirements, and regulatory compliance.
So, let’s explore the key differences between behavioral health billing and general medical billing, shedding light on the complexities involved in this specialized area of healthcare.
Key Differences Between General Medical Billing and Behavioral Health Billing
Before diving into the details, let’s have a look at how behavioral health billing differs from general medical billing in coding, privacy, and insurance rules. The table below outlines these key differences.
| Aspect | General Medical Billing | Behavioral Health Billing |
| Coding Systems | ICD-10 and CPT codes for general medical services | ICD-10 and CPT codes specific to mental health, therapy, and substance abuse |
| Type of Services | Physical exams, surgeries, lab tests, routine care | Therapy, counseling, psychiatric services, substance abuse treatment |
| Pre-Authorization & Insurance Limits | Often not required for routine services | Frequently required: limits on sessions and provider types |
| HIPAA Compliance | Required but generally less restrictive | Stricter HIPAA compliance is required due to the sensitivity of mental health data. |
| Service Billing | Billed by time and complexity (e.g., 15 or 25-minute office visits) | Billed based on session type and duration (e.g., 90832, 90834, 90837) |
| Medicare & Medicaid | Broader, more consistent coverage | Coverage varies; restrictions on provider types and session types |
| Claim Denials | Often due to administrative errors | Higher denial rates due to pre-auth issues, medical necessity, or incorrect codes |
| Billing Software | General-purpose medical billing systems | Specialized systems for therapy documentation, session tracking, and mental health codes |

1. Different Coding Systems for Behavioral Health
In both general medical billing and behavioral health billing, diagnosis and procedure codes are essential for proper billing. However, the codes used are different.
- General Medical Billing: For general medical billing, ICD-10 codes (International Classification of Diseases) are used to describe the medical conditions or diseases. The CPT (Current Procedural Terminology) codes are used to describe the medical services provided, such as office visits, surgeries, or diagnostic tests.
- Behavioral Health Billing: For behavioral health services, similar codes are used but they are more specific to mental health diagnoses and treatments. For instance, ICD-10 codes are used to describe conditions such as depression, anxiety, PTSD (Post-Traumatic Stress Disorder), and substance abuse. CPT codes are used for services such as psychotherapy, counseling, and psychiatric evaluations.
2. Billing for Mental Health Services
Behavioral health services include a wide range of treatments and therapies that are unique compared to general medical services. These include counseling, therapy, substance abuse treatment, and psychiatric services. The billing process for these services differs from standard medical care due to their specific needs and requirements.
- General Medical Services: These include treatments like physical exams, surgeries, lab tests, and routine care. These services are typically covered under general medical insurance plans with standard billing processes.
- Behavioral Health Services: Behavioral health services are often subject to different rules and restrictions. For example, many insurance policies have separate mental health networks, which means patients may need to go to specific providers who are in-network for behavioral health services. This can make the billing process more complicated as providers must ensure that they are in-network to maximize reimbursement.

3. Pre-Authorization and Insurance Limitations
Another major difference between general medical billing and behavioral health billing is the role of insurance pre-authorization and limitations.
- General Medical Billing: While pre-authorization is required for certain medical procedures, it is not as common for routine medical services like a check-up or a basic procedure. Insurance companies generally pay for general medical services based on established rates and without significant restrictions.
- Behavioral Health Billing: Behavioral health services, particularly psychiatric treatment, substance abuse treatment, and long-term therapy, are more likely to require pre-authorization. Insurance companies often limit the number of therapy sessions that are covered, and they may have specific rules for the types of mental health professionals who are authorized to provide care.
Additionally, insurance reimbursement rates for behavioral health services can differ from those for general medical services. Behavioral health services may have lower reimbursement rates, and some insurance plans may place caps on the number of sessions a patient can attend in a given time period.
4. Compliance with HIPAA Regulations
Both general medical billing and behavioral health billing must comply with the Health Insurance Portability and Accountability Act (HIPAA), which ensures patient confidentiality and security of medical information. However, compliance with HIPAA is particularly crucial in behavioral health billing due to the sensitive nature of mental health information.
- General Medical Billing: While confidentiality is essential in all medical fields, general medical billing is typically less restrictive when it comes to sharing information between providers, especially when discussing conditions like physical illnesses or injuries.
- Behavioral Health Billing: Behavioral health billing requires more stringent controls. Mental health and substance abuse information are considered highly sensitive, and special care must be taken to ensure that it is not disclosed improperly. This means that medical billers working in the behavioral health space must be extra cautious about how they handle patient information. Providers must ensure they are following HIPAA regulations when submitting claims, interacting with insurance companies, and sharing patient data.

5. Billing for Therapy Sessions vs. General Office Visits
The type of service being provided plays a significant role in how billing is handled. In general medical billing, the focus is often on services like office visits, diagnostic tests, and surgeries. However, in behavioral health billing, the focus is usually on therapy sessions, which can vary in length and type.
- General Office Visits: These are typically billed using CPT codes like 99213 (for a 15-minute office visit) or 99214 (for a 25-minute office visit). The complexity of the visit often dictates the code used.
- Behavioral Health Therapy Sessions: Behavioral health billing uses specific codes for different types of therapy, including individual therapy, group therapy, and family therapy. For example:
Each of these therapy services requires its own billing code and reimbursement rate, and the complexity of the session, along with the patient’s needs, will determine how the billing is processed.
6. Medicaid and Medicare Differences
Behavioral health billing also differs from general medical billing when it comes to government insurance programs like Medicare and Medicaid.
- General Medical Billing: Medicare and Medicaid typically cover a wide range of general medical services. For example, they will generally cover visits to primary care doctors, hospital services, and surgeries.
- Behavioral Health Billing: For behavioral health services, these government programs can be more complicated. Medicare, for instance, only covers mental health treatment provided by psychiatrists, psychologists, or other licensed professionals. Medicaid, on the other hand, varies by state, with some states covering a broad range of behavioral health services, while others may limit coverage to certain conditions or services.

7. Dealing with Denials and Appeals
Claim denials are common in both general medical billing and behavioral health billing. However, behavioral health billing tends to face a higher rate of claim denials. This is because behavioral health services are often scrutinized more closely by insurance companies, particularly for issues like substance abuse treatment or long-term therapy.
- General Medical Billing Denials: In general medical billing, denials are often related to incorrect coding, missing patient information, or services that were not covered under the insurance plan.
- Behavioral Health Billing Denials: Behavioral health claims are more likely to be denied due to the complexity of the services and the rules around mental health coverage. Common reasons for denials include:
- Lack of pre-authorization
- Services deemed medically unnecessary
- Incorrect use of CPT codes for therapy sessions
When denials occur, medical billers must be prepared to go through a denial management process and file an appeal with the insurance company, providing all necessary documentation to justify the claim.
8. Specialized Billing Software for Behavioral Health
Due to the unique requirements of behavioral health billing, many providers use specialized behavioral health billing software. These systems are tailored to the needs of mental health and substance abuse treatment providers and include features like:
- ICD-10 codes specific to mental health: These systems automatically include the necessary codes for mental health conditions.
- Treatment plan documentation: These software solutions allow therapists to keep detailed records of treatment plans, progress notes, and patient interactions, which are necessary for proper billing.
- Insurance verification: Specialized systems also help verify insurance coverage specific to behavioral health services, ensuring that claims are properly submitted.

Conclusion
As we have explored, behavioral health billing differs from general medical billing in several key areas, including the coding systems, insurance requirements, compliance needs, and the types of services provided.
Medical billers working in the behavioral health field must have a strong understanding of these differences to ensure that claims are processed accurately and in compliance with regulations. By mastering the specifics of behavioral health billing, you can help ensure that patients receive the care they need and paid fairly for your services.
