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

Introduction

When medical providers manage psychiatric conditions, clinical encounters frequently involve both medical evaluation and therapeutic intervention. For psychiatrists, psychiatric nurse practitioners, physician assistants, and other prescribing clinicians, providing medical management alongside psychotherapy is standard clinical practice. However, translating this combined service onto a medical claim often leads to confusion, claim rejections, or audit vulnerability.

Understanding CPT 90833 billing requires a clear grasp of add-on code principles, precise time tracking, and strict separation of documentation. Here is a practical, step-by-step guide to structuring your workflow, documenting both services compliantly, and submitting clean claims when pairing psychotherapy with E/M services.

Understanding CPT 90833 as an Add-On Code

CPT 90833 is classified as an add-on code. By definition, an add-on code cannot be billed as a standalone service; it must always be paired with a primary procedure code—in this case, an Evaluation and Management (E/M) service.

When a prescribing clinician provides medical evaluation (such as monitoring drug efficacy, reviewing lab work, or assessing physical symptoms) and then conducts a distinct session of psychotherapy during the same encounter, CPT 90833 is reported alongside the appropriate E/M code (e.g., 99202–99205 for new patients, 99211–99215 for established patients).

Selecting the Right Psychotherapy Add-On Code

There are three primary psychotherapy add-on codes used when combining psychotherapy with E/M visits, distinguished by the duration of the psychotherapy portion:

• CPT 90833: Psychotherapy performed with an E/M service, 30 minutes (clinical time range: 16 to 37 minutes).
• CPT 90836: Psychotherapy performed with an E/M service, 45 minutes (clinical time range: 38 to 52 minutes).
• CPT 90838: Psychotherapy performed with an E/M service, 60 minutes (clinical time range: 53 minutes or longer).

Practical Rule: To bill 90833, the psychotherapy portion of the visit must last a minimum of 16 minutes. If psychotherapy lasts less than 16 minutes, it cannot be billed separately using an add-on code.

The Gold Rule of Double-Counting: Separating E/M and Psychotherapy Time

The single most critical compliance rule when billing 90833 with E/M is avoiding the double-counting of clinical time.

Modern E/M coding guidelines allow providers to select an established office visit code (such as 99213 or 99214) based either on Medical Decision Making (MDM) or on Total Time spent on the date of the encounter. However, when adding a psychotherapy add-on code, you cannot use the time spent performing psychotherapy to calculate the E/M code level.

How to Calculate E/M and Psychotherapy Time Correctly

• If Selecting E/M Based on MDM: Choose the E/M code level (e.g., 99214) based solely on the complexity of medical decision-making (problems addressed, data reviewed, risk of management). Then, document the separate, additional time spent delivering psychotherapy (e.g., 25 minutes) to justify 90833.
• If Selecting E/M Based on Total Time: Total up the time spent on medical evaluation and management activities (reviewing charts, physical exam, ordering tests, discussing medical treatment). Match that E/M time to the appropriate CPT level. Any time allocated to psychotherapy must be subtracted from that total and documented separately under 90833.

Hypothetical Billing Example

A psychiatric nurse practitioner sees an established patient with major depressive disorder and hypertension. The clinician spends 15 minutes reviewing blood pressure trends, assessing medication side effects, and adjusting anti-depressant dosages (MDM Moderate / E/M Time 15 mins). Following the medical assessment, the clinician spends 22 minutes conducting cognitive behavioral therapy focused on coping mechanisms.

• Incorrect Billing: Combining all 37 minutes to bill a time-based 99215 along with 90833.
• Correct Billing: Reporting CPT 99214 (or 99213 based on MDM/time for the medical portion) plus CPT 90833 for the 22 minutes of documented psychotherapy.

Documentation Requirements: What Your Clinical Note Must Show

If a claim containing an E/M code and 90833 is selected for a medical necessity audit or payer record request, the note must clearly establish that two separate, distinct services took place during the same encounter.

To satisfy 90833-time documentation standards, your progress note should be structured to show:

1. The Evaluation and Management Component

• Chief complaint and history of present illness.
• Medical exam or relevant review of systems.
• Medical complexity, lab review, diagnostic findings, and medication adjustments/prescriptions.
• Specific time spent on E/M tasks (if selecting E/M level by time).

2. The Psychotherapy Add-On Component

• Exact Duration: State the start and stop times or total minutes dedicated specifically to psychotherapy (e.g., “25 minutes spent in active psychotherapy”).
• Therapeutic Modality: Name the intervention technique (e.g., supportive therapy, cognitive-behavioral techniques, insight-oriented therapy).
• Clinical Target & Response: Document the specific psychological symptoms addressed, patient engagement, and progress made.

Claim Construction and Modifier Requirements

Submitting a claim with an E/M service and an add-on psychotherapy code requires proper line-item formatting.

Line-Item Setup

• Line 1: Primary E/M code (e.g., 99214) with appropriate ICD-10 diagnosis code linked.
• Line 2: Add-on code 90833 with the primary mental health diagnosis code linked.

Understanding CPT 90833 Modifier Requirements

According to CPT coding guidelines, add-on codes are inherently recognized as secondary, distinct procedures, meaning a modifier should not theoretically be necessary. However, billing realities differ across commercial payers, Medicare Administrative Contractors (MACs), and state Medicaid programs.

• Modifier 25 (Significant, Separately Identifiable E/M Service): Many automated clearinghouses and payer edit systems require Modifier 25 to be appended to the primary E/M code (e.g., 99214-25) when billed alongside 90833. This signals to the claims system that the E/M service was significant and distinct from the psychotherapy provided.
• Check your specific contracted payer guidelines or clearinghouse edit rules to determine if appending Modifier 25 to the E/M code is required to prevent automated bundling denials.

Practical What-To-Do and What-NOT-To-Do Checklist

What TO Do

• Log Exact Minutes: Always record the precise length of the psychotherapy segment to support code selection (16–37 minutes for 90833).
• Clearly Divide Clinical Notes: Use distinct headings in your EHR note for “Medical Management” and “Psychotherapy” to make reviewer audits straightforward.
• Confirm Provider Qualifications: Ensure the rendering clinician’s licensure and credentialing allow for both medical E/M and psychotherapy reimbursement under the patient’s specific health plan.

What NOT To Do

• Do Not Bill Standalone 90833: Never list 90833 on a claim without a primary E/M service code on the same date of service.
• Do Not Count Psychotherapy Time Toward Time-Based E/M: Never double-count minutes. Time allocated to 90833 cannot contribute to E/M time thresholds.
• Do Not Use 90833 for Non-Prescribing Clinicians: Master’s-level therapists (LCSW, LPC, LMFT) who do not bill medical E/M codes cannot use add-on code 90833; they must bill standalone psychotherapy codes (e.g., 90832, 90834).

Summary: Key Takeaways for Practice Billing

• Add-On Dependency: CPT 90833 is an add-on code that must always be billed with a primary E/M code (99202–99215) and cannot stand alone.
• Minimum Time Threshold: The psychotherapy portion must meet or exceed 16 minutes to bill 90833.
• Strict Time Separation: Never overlap time used for E/M code selection with time spent conducting psychotherapy.
• Complete Documentation: Progress notes must record the psychotherapy modality, target symptoms, patient response, and distinct psychotherapy duration.
• Verify Modifier Edits: Monitor payer requirements regarding appending Modifier 25 to the primary E/M code to prevent automated bundling claims denials.

About PrimeCare MBS

PrimeCare MBS provides comprehensive medical billing and revenue cycle management tailored to healthcare providers and mental health practices. From insurance verification and claims submission to denial management and accounts receivable follow-up, our team helps keep your billing compliant and efficient. Managing combined E/M and psychotherapy coding, line-item edits, and payer-specific modifier guidelines requires detailed billing attention. 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. How should CPT 90833 and an E/M code be formatted on a claim?

A1: The primary E/M code should be listed on the first claim line, followed by the add-on code CPT 90833 on the second line with its corresponding mental health diagnosis.

Q2. What specific details must be documented in the chart to support billing CPT 90833?

A2: The progress note must distinctly record the exact psychotherapy duration, therapeutic modality used, target symptoms addressed, and patient response, completely separate from the medical evaluation notes.

Q3. What happens if the psychotherapy portion of an E/M visit lasts less than 16 minutes?

A3: If psychotherapy lasts under 16 minutes, CPT 90833 cannot be reported, though the clinical discussion may still contribute to overall E/M time or medical decision-making complexity.

Q4. Which psychotherapy add-on code should be billed if the therapy session lasts 40 minutes during an E/M visit?

A4: If the psychotherapy portion lasts 40 minutes, you should bill CPT 90836 instead of CPT 90833, as CPT 90836 covers psychotherapy sessions ranging from 38 to 52 minutes.

Q5. Why might a payer deny a claim submitted with an E/M code and CPT 90833?

A5: Claims are typically denied when payers detect an unbundling issue, a missing Modifier 25 on the primary E/M code, or an ineligible non-prescribing provider NPI listed on the claim.