Stress tte only
CPT 93350 covers stress echocardiography testing without interpretation, where ultrasound images of the heart are captured while the patient exercises or receives medication to increase heart rate. This code is for the technical component only—the actual performance of the test.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
Billing tips
Bill 93350 only for technical component; ensure interpretation is billed separately as 93351 or verify global code usage
Impact: Prevents $75-100 underpayment when interpretation performed but not billed; avoid duplicate billing that triggers audits
Document exact stress protocol used (Bruce, modified Bruce, pharmacologic agent and dosage) and maximum heart rate achieved
Impact: Missing protocol documentation causes 15-20% of denials; peak heart rate <85% predicted may trigger medical necessity review
Verify medical necessity with qualifying diagnosis codes (chest pain, abnormal EKG, known CAD, pre-operative clearance)
Impact: Screening without symptoms typically denied; proper diagnosis coding prevents 30-40% of initial denials worth $176.94 per claim
Use modifier 53 with detailed documentation when test discontinued for medical reasons; include heart rate, symptoms, and physician decision
Impact: Proper modifier 53 usage recovers 50-75% payment ($88-133) versus complete denial for incomplete studies
Separate billing for stress agent administration (e.g., dobutamine, adenosine) using appropriate drug codes when pharmacologic stress used
Impact: Additional $40-80 reimbursement for drug administration codes 96365-96368 when properly documented and billed separately
Ensure 14-day interval between stress echo procedures unless emergent clinical change documented; payer frequency limits apply
Impact: Same/similar procedures within 14 days often denied as duplicates; override requires peer-to-peer review and detailed justification
Common denials
Medical necessity not established—payer deems stress echo not appropriate for diagnosis code submitted
How to appeal: Submit appeal with clinical notes documenting symptoms, prior testing results, risk factors, and how stress echo will change management. Include relevant literature supporting stress echo for specific indication. Request peer-to-peer review citing ACC/AHA appropriate use criteria.
Bundled with other cardiac imaging or E/M service performed same day (CCI edits)
How to appeal: Submit documentation proving services were separate and medically necessary. Use modifier 59 if not initially applied. Provide timeline showing distinct encounters or medical necessity for both procedures. Reference NCCI manual exceptions if applicable.
Incomplete study—test terminated before adequate stress level achieved without documented medical contraindication
How to appeal: Resubmit with modifier 53 if not used initially. Provide detailed documentation of heart rate achieved, symptoms causing termination, physician orders to stop, and medical justification. Include stress protocol flow sheet and physician contemporaneous notes.
Frequency limitation exceeded—repeat stress echo performed within payer-specified timeframe without authorization
How to appeal: Document significant clinical change since prior study (new symptoms, hospitalization, intervention, medication changes). Provide comparative clinical information. Submit physician letter explaining medical necessity for earlier-than-usual repeat testing. Request retroactive authorization if policy allows.
Frequently asked questions
What is the Medicare reimbursement rate for CPT 93350 in 2025?
The 2025 Medicare national average reimbursement for CPT 93350 is $176.94 for both facility and non-facility settings. This rate is based on 5.47 total RVUs (1.46 work RVU, 3.95 practice expense RVU, 0.06 malpractice RVU) multiplied by the 2025 conversion factor of 32.3465. Actual reimbursement varies by geographic location based on GPCI adjustments.
What is the difference between CPT 93350 and 93351?
CPT 93350 represents the technical component only of stress echocardiography (equipment, staff, image acquisition), while 93351 includes both the technical and professional components (complete service with interpretation and report). Use 93350 when billing only for performing the test without interpretation, or when splitting technical and professional components between different providers or facilities.
Can CPT 93350 be billed with an E/M service on the same day?
Yes, CPT 93350 can be billed with an E/M service on the same day if the E/M represents a significant, separately identifiable service beyond the pre-procedure assessment inherent to the stress test. Use modifier 25 on the E/M code and ensure documentation clearly shows the separate nature and medical necessity of both services. The E/M should address issues beyond stress test ordering and interpretation.
What diagnosis codes support medical necessity for CPT 93350?
Common supporting diagnosis codes include chest pain (R07.9, R07.89), abnormal EKG findings (R94.31), known coronary artery disease (I25.10-I25.119), shortness of breath (R06.02), syncope (R55), history of myocardial infarction (I25.2), atypical chest pain (R07.89), and pre-operative cardiac evaluation with risk factors. Screening codes without symptoms or risk factors typically do not meet medical necessity criteria for Medicare and most commercial payers.
How should I bill a stress echo that was stopped early due to patient symptoms?
When a stress echocardiogram is discontinued before completion due to medical reasons (chest pain, arrhythmia, blood pressure changes, patient fatigue), bill CPT 93350 with modifier 53 (discontinued procedure). Documentation must include baseline vitals, heart rate achieved, specific symptoms or findings causing termination, and physician order to stop. Reimbursement is typically reduced to 50-75% of the full rate, or approximately $88-133, depending on payer policy.
What are the RVU values for CPT code 93350 in 2025?
For 2025, CPT 93350 has a work RVU of 1.46, practice expense RVU of 3.95 (both facility and non-facility), and malpractice RVU of 0.06, totaling 5.47 RVUs. When multiplied by the 2025 conversion factor of 32.3465, this yields the Medicare national average payment of $176.94. These values are from the CMS Medicare Physician Fee Schedule RVU25A released December 23, 2024.
How often can CPT 93350 be billed for the same patient?
Medicare and most commercial payers have frequency limitations for stress echocardiography, typically allowing one test per 12 months unless documented clinical change warrants earlier repeat testing. Same-day or very short-interval repeats require modifier 76 and detailed justification. Prior authorization may be required for repeat studies within payer-specified timeframes. Medical necessity must be clearly documented with new symptoms, intervening cardiac events, or significant changes in clinical status.