Cardiology billing services
Billing for cardiology practices that read studies, run in-office testing and follow device patients, with professional and technical components billed to match where each study was done.
Why cardiology billing takes specialty knowledge
Cardiology billing mixes office visits, diagnostic testing, device monitoring and procedures, often for the same patient in the same week. Studies done in the hospital are billed with modifier 26 for the read, while studies on your own equipment are billed globally. Commercial plans send echoes, stress tests and nuclear studies through prior authorization vendors, and Medicare contractors check them against local coverage rules for frequency and medical necessity.
SFA Solutions bills cardiology claims from your EHR, schedule and reading reports. We confirm authorization before imaging, split professional and technical components by place of service, apply modifier 25 when a significant visit happens alongside testing, and track remote device monitoring periods so each interrogation is billed once per allowed interval. The goal is fewer authorization denials and fewer studies read but left unbilled.
Common codes we work with in cardiology
| Code | Description |
|---|---|
| 93000 | Electrocardiogram, routine 12-lead, with interpretation and report |
| 93306 | Transthoracic echocardiogram, complete, with spectral and color flow Doppler |
| 93015 | Cardiovascular stress test with supervision, interpretation and report |
| 93351 | Stress echocardiogram including continuous ECG monitoring with supervision |
| 78452 | Myocardial perfusion imaging, SPECT, multiple studies at rest and stress |
| 93458 | Left heart catheterization with coronary angiography and left ventriculography when performed |
| 93224 | External ECG recording up to 48 hours, including recording, scanning analysis and report |
| 93294 | Remote interrogation of pacemaker system, up to 90 days |
CPT is a registered trademark of the American Medical Association. Payer rules vary; we check each payer's current policy.
Where cardiology practices lose revenue
Global, professional and technical billing
Diagnostic tests like 93306 and 78452 are billed globally when you own the equipment and employ the staff. When the study is done in a hospital, your physician bills only the interpretation with modifier 26 and the facility bills the technical part. Billing global for a hospital study is a common overpayment that payers recoup.
Prior authorization for imaging
Many commercial and Medicare Advantage plans require authorization for echocardiography, stress testing, nuclear perfusion imaging and cardiac CT, often through a radiology benefit manager. The authorization has to match the CPT code performed, so a planned 93350 that becomes a 93351 may need an updated request. We check requirements before the appointment and keep authorization numbers tied to each claim.
Same-day visits and testing
An E/M visit on the same day as a stress test or echo is payable only when it is significant and separately identifiable, billed with modifier 25. A visit whose only purpose is to review the test result is usually included. Cardiac catheterization and many interventional codes carry global periods, so follow-up visits inside that window are not separately billed.
Device monitoring intervals
Remote pacemaker and defibrillator interrogation codes such as 93294 and 93295 cover up to 90 days, and the related technical support codes cover the same period. In-person programming and interrogation codes cannot be billed by the same provider for the same period in some combinations. We keep a calendar of each patient's monitoring cycle so claims are not denied as duplicates.
What else affects cardiology revenue
A/R challenges in cardiology
Cardiology A/R tends to build around imaging authorizations. When an echo, nuclear stress test or cardiac CT is done without an approval on file, the denial is hard to reverse, because benefit managers rarely grant retro authorization. Remote device monitoring adds another delay, since codes such as 93294 and 93295 cover a 90-day period and are billed once the period ends. Large coinsurance on cath and nuclear studies also leaves patient balances that need a clear statement and steady follow-up.
Credentialing considerations
Cardiologists enroll under the cardiovascular disease taxonomy (207RC0000X) or a subspecialty such as interventional cardiology or clinical cardiac electrophysiology, which some plans use to decide who can perform certain procedures. If you bill the technical component of nuclear imaging or cardiac CT to Medicare, the site needs advanced diagnostic imaging accreditation, and some commercial plans also require echo or nuclear lab accreditation for in-office studies. Hospital and cath lab privileges have to stay current for each reading and interventional physician.
Payer considerations
Many commercial and Medicare Advantage plans route cardiac imaging through radiology benefit managers such as eviCore or Carelon, each with its own clinical criteria and request process. Traditional Medicare does not require prior authorization for most of these studies, but Medicare contractors have local coverage rules on frequency and indications, especially for repeat echoes. Device monitoring, cardiac rehab and ambulatory ECG monitoring codes also have payer specific limits, so we check the plan's policy before the service is scheduled.
Cardiology coding details that affect payment
ICD-10 considerations
ICD-10-CM presumes a link between hypertension and heart failure, so a patient with both is coded with I11.0 (hypertensive heart disease with heart failure) plus a specific I50 code, and I13 combination codes apply when chronic kidney disease is also present. Heart failure should be coded to type and acuity, such as I50.22 for chronic systolic heart failure, because unspecified I50.9 weakens medical necessity for echoes and device work. Atrial fibrillation codes now separate paroxysmal (I48.0), longstanding persistent (I48.11), other persistent (I48.19) and permanent (I48.21). Device checks pair with codes such as Z95.0 (presence of cardiac pacemaker) or Z45.010 for a pacemaker check, and Z79.01 captures long-term anticoagulant use.
Modifiers to watch
| 26 | Billed on the interpretation of an echo, stress test or nuclear study performed on hospital or other non-owned equipment. |
|---|---|
| TC | Used when the practice owns the equipment and performs the study but a different physician provides the interpretation. |
| LC, LD, RC, LM, RI | Coronary artery modifiers that identify which vessel was treated on PCI codes such as 92928, which payers use to check additional vessel billing. |
| 78 | Applied when the cardiologist returns the patient to the cath lab or procedure room for a related complication during the global period of an earlier procedure. |
| 59 or XU | Used sparingly when a separately reportable procedure, such as a distinct diagnostic study, falls outside the usual work of the main procedure under an NCCI edit. |
Global periods
Diagnostic catheterization (93458) and coronary intervention (92928) carry 0-day global periods, so a next-day visit is separately billable. Pacemaker and defibrillator insertions such as 33208 and 33249 carry 90-day globals, which bundle routine postoperative visits and wound checks.
Medicare considerations
Medicare covers several cardiac services under national coverage determinations, including implantable defibrillators (NCD 20.4), transcatheter aortic valve replacement (NCD 20.32) and cardiac rehabilitation (NCD 20.10), and some of these require registry participation or a documented shared decision-making visit. Diagnostic tests performed in the office must meet Medicare's physician supervision level for each code. MACs also publish local coverage rules for echocardiography and ambulatory ECG monitoring that list covered diagnoses and frequency limits.
Cardiology billing KPIs to track
- Imaging authorization denial rate. Echo, nuclear and cardiac CT denials for missing authorization rarely reverse, so this rate shows how well the front end is working.
- 26/TC modifier error rate. Global billing on hospital studies leads to recoupments, so tracking mismatches between place of service and modifier protects revenue already paid.
- Remote monitoring capture rate. Comparing billed device monitoring periods against enrolled device patients shows how many 90-day intervals go unbilled.
- Medical necessity denials on repeat studies. Frequency denials on repeat echoes point to diagnosis coding gaps or orders that do not meet local coverage rules.
Cardiology billing audit checklist
- Compare place of service against the 26, TC or global billing on a sample of echo and stress test claims.
- Confirm authorization numbers on imaging claims match the CPT code actually performed.
- Check that each remote device monitoring claim falls in a new 90-day period for that patient.
- Review heart failure and atrial fibrillation claims for unspecified codes that should be coded to type.
- Verify ICD and TAVR claims include the documentation required by the applicable national coverage determination.
- Audit E/M visits billed with modifier 25 on test days for a separately documented problem.
How SFA runs cardiology billing
We map your testing workflow, including which studies are global and which are read only.
Authorizations are verified before imaging and linked to the scheduled CPT code.
Studies and visits are coded from reports and notes, and most clean claims are submitted within 24 hours of final review.
Denials are appealed with reports and supporting records, and device monitoring periods are tracked monthly.
The services that matter most for cardiology
Eligibility Verification & Prior Authorization
Imaging prior authorization is the most common cause of cardiology denials, and it must be in place before the test.
Learn moreMedical Coding
Correct 26/TC splits, cath coding and device monitoring codes protect payment and prevent recoupments.
Learn moreDenial Management
Medical necessity and frequency denials on echoes and stress tests can often be overturned with the right records.
Learn moreWhat practices typically see with SFA
Averages and selected client results. Your free audit shows where your own numbers stand today.
Target for the claims we manage, not a measured average.
Highest improvement seen in selected client results.
Largest drop in A/R days seen in selected client results.
Targeted for submission within 24 hours after final review.
From primary care and nurse practitioners to surgery and imaging.
We work inside the system your practice already uses.
Results vary by practice, specialty, payer mix, claim volume, billing history, documentation and other factors. Performance figures represent average or selected client results and are not guarantees of future performance. The 95% figure is a clean-claim target, not a measured cohort. The client-results page does not include a measurement period, starting collections, or practice size.
Cardiology billing questions
When should we use modifier 26 for cardiology tests?
Use modifier 26 when your physician only interprets a study performed on equipment you do not own, such as a hospital echo or stress test. If you own the equipment and staff, bill the code globally without a modifier.
Can we bill an office visit on the same day as an echo?
Yes, if the visit is significant and separately identifiable from the decision to order or review the test. Append modifier 25 to the E/M and document the visit separately.
Do echocardiograms need prior authorization?
For many commercial and Medicare Advantage plans, yes. Traditional Medicare generally does not require prior authorization for echocardiograms but does apply medical necessity and frequency rules from local coverage policies.
How often can remote device checks be billed?
Remote interrogation codes for pacemakers and defibrillators cover up to 90 days, so they are generally billed once per 90-day period per patient. Check the payer's rules for combining them with in-person checks.
Do you bill for cardiologists who work in hospitals?
Yes. We bill professional services for hospital-based work, including inpatient visits, consults and interpretations with modifier 26.
See what your cardiology billing is missing
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