How to Bill Psychotherapy With an E/M Service Using CPT 90833

Introduction

In psychiatric and behavioral healthcare, medical prescribers frequently evaluate a patient’s medication regimen and overall health while simultaneously providing therapeutic intervention during a single encounter. When an Evaluation and Management (E/M) service is delivered alongside psychotherapy, reporting two standalone codes is incorrect. Instead, coding standards require combining an appropriate primary E/M code with a designated psychotherapy add-on code. For sessions incorporating approximately 30 minutes of psychotherapy, CPT code 90833 is the appropriate add-on code. However, improper time tracking, blurred documentation, and incorrect modifier application frequently cause clearinghouse edits and payer denials.

Here is a practical guide to understanding CPT 90833 billing, meeting documentation requirements, applying modifiers properly, and avoiding common billing pitfalls.

What Is CPT 90833 and When Does It Apply?

CPT 90833 represents 30 minutes of psychotherapy when performed as an add-on service in conjunction with an Evaluation and Management (E/M) service on the same date for the same patient.

Because CPT 90833 is an add-on code, it carries specific reporting rules:

• It cannot be billed alone: It must always be linked to a primary base E/M code (such as established office visit codes 99212–99215, new patient codes 99202–99205, or inpatient E/M codes).
• It requires medical scope: The rendering provider must be licensed to perform both medical evaluation and management and psychotherapy (e.g., Psychiatrists [MD/DO], Psychiatric Nurse Practitioners [PMHNPs], and Physician Assistants [PAs]). Non-prescribing therapists (LCSWs, LPCs) who do not bill E/M services cannot report 90833.
• Service distinction: The psychotherapy service must be a distinct, identifiable session separate from the medical evaluation, history taking, and medical decision-making performed during the E/M service.

Understanding the Time Threshold for 90833

Time tracking is one of the most critical elements of billing psychotherapy add-on codes. CPT guidelines define timed psychotherapy codes based on specific time ranges rather than exact minute allocations.

For CPT 90833 (designated as a 30-minute session), the CPT midpoint rule governs the acceptable time frame:

• Less than 16 minutes: Do not bill a psychotherapy add-on code. Bill the primary E/M service only.
• 16 to 37 minutes: Bill the primary base E/M code paired with CPT 90833.
• 38 to 52 minutes: Bill the primary base E/M code paired with CPT 90836.
• 53 minutes or more: Bill the primary base E/M code paired with CPT 90838.

Critical Rule: The time counted toward 90833 must be dedicated strictly to psychotherapy. You cannot “double-count” time spent taking a medical history, reviewing lab results, discussing medication side effects, or performing physical exams toward the 16-minute psychotherapy threshold.

Practical Billing Workflow for E/M and Psychotherapy Encounters

When preparing a claim for an encounter that includes both E/M and psychotherapy, follow this systematic workflow:

Step 1: Document E/M and Psychotherapy Separately

Ensure the progress note clearly divides the encounter into two distinct components:

• The E/M portion: Outline medical decision-making (MDM) or time spent reviewing symptoms, physical findings, lab orders, and medication adjustments.
• The Psychotherapy portion: Explicitly state the exact duration of psychotherapy (e.g., “20 minutes spent in individual psychotherapy”) and describe the therapeutic modalities used (e.g., cognitive behavioral techniques, insight-oriented discussion).

Step 2: Select the Base E/M Code

Determine the correct level of E/M service based on Medical Decision Making (MDM) or total E/M time spent. If selecting the E/M code based on time, ensure that the time spent on E/M activities is calculated independently of the psychotherapy minutes.

Step 3: Append CPT 90833

Add CPT 90833 on the second line item of the claim, directly below the primary E/M code. Ensure the primary diagnosis code that justifies the service is properly linked to both line items.

Step 4: Verify Modifier Requirements (Modifier 25)

Review individual payer billing rules regarding modifier usage:

• Many commercial payers and Medicare Administrative Contractors (MACs) require Modifier 25 appended to the primary E/M code (e.g., 99213-25) to indicate that a significant, separately identifiable evaluation and management service was provided on the same day as psychotherapy.
• Never append Modifier 25 directly to the 90833 add-on code itself.

Practical Billing Examples

Understanding how E/M and psychotherapy interact in practice helps ensure accurate coding and documentation.

Example A: Medication Review with Short Psychotherapy

A psychiatrist conducts an established patient office visit. The doctor spends 10 minutes reviewing depression symptoms, checking vital signs, and adjusting the dosage of a daily antidepressant (qualifying for an established E/M level based on MDM). Following the medication review, the psychiatrist spends 25 minutes using supportive psychotherapy to address coping mechanisms for workplace stress.

• Base Code: CPT 99213 (or 99214 depending on MDM)
• Add-On Code: CPT 90833
• Reasoning: The psychotherapy portion lasted 25 minutes (falling within the 16–37 minute threshold), and the medical evaluation was documented separately.

Example B: Brief Therapeutic Intervention (Below Threshold)

A psychiatric nurse practitioner sees a patient for a medication follow-up. The medical review takes 15 minutes. At the end of the session, the NP spends 10 minutes offering brief encouraging statements and supportive listening.

• Coding Decision: Bill the appropriate base E/M code only (e.g., 99213).
• Reasoning: Psychotherapy lasted only 10 minutes. Because 10 minutes is less than the 16-minute minimum requirement, CPT 90833 cannot be reported.

Essential Documentation Requirements

When payers audit claims containing CPT 90833, they inspect notes for clear separation of services and explicit time logging. A compliant medical record must include:

• Explicit Time Statement: A clear note stating the total time spent in psychotherapy (e.g., “25 minutes spent in individual psychotherapy using cognitive restructuring”).
• Therapeutic Modality: Description of the therapeutic techniques applied (e.g., CBT, psychodynamic, behavioral activation, supportive therapy).
• Clinical Findings & Treatment Plan: Summary of patient response, target symptoms addressed, and ongoing behavioral goals.
• Separate E/M Documentation: Clear evidence of medical decision-making or E/M service elements that stand on their own without the psychotherapy notes.

Common CPT 90833 Billing Mistakes to Avoid

1. Billing 90833 as a Standalone Code: Submitting 90833 without a primary base E/M code will cause an immediate clearinghouse edit or claim rejection.
2. Double-Counting Service Time: Including time spent on medication management or medical history toward the psychotherapy minute count is a major compliance risk during post-payment audits.
3. Omitting the Exact Psychotherapy Time: Writing generic notes like “psychotherapy provided during visit” without logging specific start/stop times or total minutes often leads to downcoding or claim recoupment.
4. Incorrect Modifier Usage: Forgetting to apply Modifier 25 to the base E/M code when required by the payer, or improperly placing Modifier 25 on CPT 90833.
5. Reporting 90833 for Non-Prescribing Clinicians: Attempting to bill 90833 under an LCSW, LPC, or LMFT provider NPI when no physician or NP performed an E/M service.

Summary & Key Takeaways

Billing CPT 90833 accurately requires understanding the structural relationship between primary E/M services and psychotherapy add-ons:

• CPT 90833 is an add-on code that represents 30 minutes of psychotherapy (16–37 minutes actual duration) and must be linked to a base E/M code.
• Keep time separate: Time spent on medical evaluation and management cannot be counted toward the 16-minute psychotherapy threshold.
• Document distinct services: Ensure chart notes clearly separate medical decision-making from psychotherapy techniques and log exact psychotherapy time.
• Apply Modifier 25 correctly: Place Modifier 25 on the primary E/M code when required by payers to establish that the E/M service was significant and separately identifiable.

About PrimeCare MBS

PrimeCare MBS offers comprehensive medical billing and revenue cycle support for healthcare practices. From insurance verification and credentialing guidance to clean claim submission, payment posting, and denial management, our team works to keep your claims compliant and your reimbursement steady. Managing medical billing when pairing E/M services with psychotherapy add-on codes requires precision and up-to-date knowledge of payer-specific coding rules. Call (407) 413 9101 or email sales@PrimeCareMedicalBilling.com to learn more.

Disclaimer: This article is provided for general informational purposes only and should not be interpreted as legal, coding, compliance, reimbursement, or payer-specific billing advice. Coverage policies and claim processing requirements vary by payer and may change over time. Providers should refer to applicable payer guidelines and official CMS requirements, where applicable, before making billing or reimbursement decisions.

Frequently Asked Questions (FAQ’s)

Q1. Can CPT code 90833 ever be billed by itself on a claim?

A1: No, CPT 90833 is an add-on code that must always be billed alongside a primary Evaluation and Management (E/M) base code.

Q2. What is the minimum time required to bill CPT 90833?

A2: The psychotherapy portion of the visit must last for a minimum of 16 minutes (covering the 16 to 37-minute range) to qualify for CPT 90833.

Q3. Can non-prescribing therapists like LCSWs or LPCs bill CPT 90833?

A3: No, non-prescribing clinicians cannot bill CPT 90833 because they are not licensed to perform the primary E/M services required to support the add-on code.

Q4. Where should Modifier 25 be placed when billing E/M with psychotherapy?

A4: Modifier 25 should be attached to the primary E/M code (e.g., 99213-25), never to the 90833-add-on code itself.

Q5. Can time spent reviewing medication side effects count toward the 16-minute psychotherapy threshold?

A5: No, time spent on medical decision-making or medication management belongs to the E/M service and cannot be double-counted toward psychotherapy time.