CPT Code for Chest X-Ray: Common Coding Scenarios and Best Practice for 2026

Chest X-ray is the most commonly ordered imaging studies in all of medicine - it is frequently ordered in pulmonology practices, the ER, in urgent care centers, on hospital floors and in pulmonology offices. And yet, despite how routine the order is, choosing the correct CPT code for chest X-ray trips up billing teams with surprising regularity.

What the radiologist performed nd what the physician ordered are not always the same thing. Vagueness in documentation leaves coders to play a game of guessing, leading to undercoding or overcoding and costly denials. 

The information within this guide is designed to provide clients and billers with a one-stop reference guide to all chest X-ray CPT codes they will encounter in 2026. We'll explain each of the chest X-ray code family codes, required documentation, common payer policies and most importantly, the modifiers required for accurate claim submission, as well as common coding scenarios which stump even the seasoned professional.

What Is the CPT Code for Chest X-Ray? The Complete Code Family

The CPT code for chest X-ray sits within the Diagnostic Radiology section of the CPT code book, specifically under the Thorax subsection (codes 71045–71048). Since 2018, CMS and the AMA restructured the chest X-ray code set to more precisely reflect the number of views obtained. Here is the complete breakdown:

Single View Chest X-Ray

The CPT code for chest X-ray with one view is CPT 71045. Single-view studies are one projection. Commonly, an AP view is obtained. This single-view approach is the norm for:

• Portable chest x-rays on ICU patients or inpatient hospitals where patient cannot be transported to standard PA view.
• Emergency Department AP studies used in emergent situations to give a quickly informative view on unstable/critical patients.
• Line placement follow-up views (central venous lines, ET tubes, chest tubes).
• Post-procedure placement verification studies where only view of placement is necessary.

This CPT 71045 is also the most common chest x-ray CPT in the inpatient world. Portable AP single-view imaging is common in critically ill, ICU, or immobile inpatients. However, ambulatory hospitalized patients may still receive standard two-view PA and lateral chest radiographs when clinically appropriate. Document the reason for the single-view approach in the radiology report to support medical necessity if the claim is reviewed.

CPT Code for Chest X-Ray PA & LAT

The combination of PA and lateral images are both needed to accurately diagnose and image the chest because anatomically the images are complementary to each other. The PA view visualizes the width of the mediastinum, heart silhouette, and lung fields from anterior to posterior, where the lateral view visualizes the retrosternal and retrocardiac spaces, posterior costophrenic angles and spine which cannot be visualized on the frontal images alone and may obscure abnormalities. Together these images are able to detect pneumonia, pleural effusions, cardiomegaly, masses, and interstitial lung disease with high confidence.

CPT Code 71046 - Two-View Chest X-Ray (PA and Lateral)

This is the most frequently used CPT code for chest X-ray; predominantly used in physician offices and out patient clinics.It is the standard code for what most people mean when they order a “routine chest X-ray” - a PA (posteroanterior) view taken with the patient standing, plus a lateral view taken from the side. This is the code for situations in which exactly two views have been obtained and documented. It applies regardless of whether those two views are PA and lateral, AP and lateral, or any other two-projection combination. 71046 is defined by view number and not specifically what projections have been obtained-although the PA and lateral will be what you see the most in a typical two-view scenario.

For ambulatory care, specialist offices, and outpatient radiology, CPT 71046 is the workhorse CPT code for chest X-ray and will account for the majority of chest imaging claims your billing team processes.

CPT Codes 71047 & 71048-Three & Four+ View Chest X-Rays

CPT 71047 covers three-view chest studies and CPT 71048 covers studies with four or more views. These are less commonly encountered than 71045 and 71046 but they apply in specific clinical scenarios:

CPT 71047 - Three views: Used when an oblique projection is performed in addition to the PA and lateral for a 3 view study. These views can also be used to assess rib fractures, pleural plaques, or concerning masses at the lung margins. The views can also be ordered to further evaluate an AP supine study.

CPT 71048 - Four or more views: A study where additional obliques or the 4 view study can be obtained to identify suspicious masses, or to further evaluate occupational lung disease. Obliques or apical lordotics are often done when a question about pleural fluid is raised in a patient that can not fully comply. An expiratory view may also be used to better assess air trapping or lung volumes.

Prior to selecting either 71047 or 71048, the number of views performed must be verified against the radiologist’s report, as all projections performed must be documented to the in report. Charging for 4 or more views than are documented is an audit trigger for all carriers, as this would indicate an upcoding service.

Common Coding Scenarios: Getting It Right in Practice

Knowledge of the codes in theory is one thing, and use of those codes correctly in your team's daily scenarios is another thing altogether. Below is a list of common chest x-ray coding scenarios and the correct CPT code for chest x-ray in each:

Scenario 1: Routine Pre-Op Chest X-ray

58-yr old male scheduled for elective hernia repair has a surgeon ordered PA and lateral chest x-ray. The radiology report indicates two views with readings for each.

CPT code: 71046 CPT code for chest x-ray PA and lateral, two views. This will be coded with the proper ICD-10 for pre-operative evaluation. Z01.811 is used when the chest X-ray is performed as part of a preprocedural respiratory examination. Code selection should follow payer requirements and physician documentation.The commercial carriers may expect some sort of documentation on the record as to why this chest x-ray was necessary for the surgery.

Scenario 2: Shortness of Breath - Portable AP

72-yr old to ED with acute shortness of breath. Portable AP chest X-ray is obtained at the beside, as the patient is in respiratory distress.

CPT Code: 71045 - single-view CPT code for chest X-ray. Report reads 'portable AP chest' and there are findings that are compatible with pulmonary oedema ('bilateral pulmonary infiltrates'). Diagnosis coding should reflect documented provider diagnoses and payer-specific coding guidelines.

Scenario 3: Pneumonia Follow-up While Hospitalized; 2 Views Ordered

Hospitalized patient admitted to hospital for treatment of community-acquired pneumonia, receives a chest X-ray 4 days later. Tech gets both PA and lateral views with the patient standing.

CPT Code: 71046 - CPT code for 2 view chest X-ray. This should be billed under the proper revenue code (320 Radiology diagnostic) when this is filed under a global inpatient hospital bill. If filing a professional component-only radiology bill, use modifier 26. It should not be duplicate billed if facility has filed a global claim.

Modifiers Every Coder Needs to Know for the CPT Code for Chest X-Ray

Modifier 26 - Professional Component

This modifier 26 is applied to a CPT code of the chest X-Ray to represent just the physician interpretation and report-the professional component. This modifier is used when the radiologist does not own the equipment and the technical component (equipment, technologist, facility fee) is being billed by a separate hospital or facility group. Modifier 26 is used when just the professional interpretation is billed. It is not always necessary and its usage depends on equipment ownership and contractual billing arrangements.

Modifier TC - Technical Component

This modifier TC is applied when you are billing for only the technical components of the chest X-Ray-the equipment, supplies, radiologic technologist's time, and facility expenses. In the case of hospital outpatient charges that would involve a separate radiologist group to bill the 26 component, modifier TC is reported when billing only the technical component, although institutional billing practices vary by payer and setting.

Modifier 52 - Reduced Services

If a chest X-Ray is begun but then aborted-such as a two-view study in which the patient is unable to complete a second view due to pain or respiratory distress-modifier 52 would be applied to show a reduced service was rendered. The radiologic report should document the reasons the study was reduced.

Modifier 76 - Repeat Procedure by Same Physician

Modifier 76 is used when the same physician repeats the same procedure on the same day. Documentation should support the medical necessity of the repeat study. This is most frequent in the ICU where morning portables are repeated in the afternoon following insertion of a new central line. For the same reasons the clinical indications of the repeated study must be documented in each report.

Top Chest X-Ray Coding Mistakes and How to Prevent Them

These are the errors that seem most frequent when audit and billing support is performed on chest X-ray claims:

1. Incorrect submission of deleted pre-2018 codes. CPT codes 71010, 71020, and family deleted in 2018. Will automatically deny if submitted. Make sure you update chargemaster and EHR charge capture templates if they haven't been refreshed in the last several years.

2. Two (2) units of CPT 71045 is billed instead of 71046 (2-view chest X-ray). Billing two (2) units of CPT 71045 will set up NCCI edits and will deny or will be recouped on audit.

3. Portable AP is billed as 2-view chest X-ray. It should be billed under 71045 which covers portable AP X-ray (1 view). We cannot bill 71046 (2-view chest X-ray) because 2 views are clinically indicated, so report and claim must match what is performed and documented.

4. Missing/Incorrect Modifier with Split Billing. Forgetting to bill modifier 26 on professional component claims or submitting with global when facility bills for TC alone will put in a double billing flag and can result in overpayment letters.

5. Insufficient documentation of the radiology report. Insufficient documentation increases audit and denial risk and may not support the level of service billed.

How Rapid Claims Supports Accurate Chest X-Ray Billing

While chest X-ray claims may appear to be small reimbursement amounts, by sheer volume, chest X-ray claims are one of the highest-impact code family in outpatient radiology billing. Small mistakes – an incorrect view count, a missing modifier, a code removed from the chargemaster and erroneously placed on a claim – are repeated over and over in thousands of claims and rapidly add up to significant revenue loss and compliance risk.

Rapid Claims radiologists and billing staff audit chest X-ray charges with each and every client claim as part of a normal pre-submission process. We check that the CPT code on each chest X-ray claim matches the view documentation in the radiology report, that modifiers are correct for the place of service, that diagnosis codes are provided, and that erroneous codes are not entering the system.

Final Word: The Right CPT Code for Chest X-Ray, Every Time

Chest X-ray coding in 2026 boils down to a single principle: report dictates the code. Count the reported views. Compare the count to the appropriate code within the 71045-71048 series. Add the correct modifier for your billing situation. Match each claim with the ICD code that represents the reported clinical reason for the X-ray.

What's the CPT code for a chest x-ray? As is rarely the case in medicine, it depends entirely on how many views of the chest are ordered and reported. It is 71045 for one view of the chest. CPT 71046 is the CPT code for PA and lateral chest X-ray or any two-view combination of the chest. CPT 71047 is the CPT code for any three-view combination of the chest. CPT 71048 is the CPT code for any combination of four or more views of the chest. Once these four coding decisions are correctly made. These edits reduce audit risk and make the article sound more professional.

FAQs

What is the CPT code for a chest X-ray?

 The CPT code for a chest X ray depends on the number of views taken. The code is 71045 for a single view, 71046 for two views, 71047 for three views, and 71048 for four or more views.

What is the CPT code for a chest X-ray PA and lateral?

 A chest X ray that shows PA and lateral views would be coded as CPT 71046. This is the usual code for routine two-view chest X-rays.

What is the CPT code for a 2-view chest X-ray?

 The CPT code for a 2-view chest X-ray is 71046. The code is used any time a documented 2-view chest X ray was taken.

Should I bill two units of CPT 71045 instead of 71046?

 No. 71045 is only the code for a single-view chest X-ray. If two views of the chest are documented, bill 71046.

How do I select the right CPT code for a chest  X-ray?

 Select the correct CPT code for a chest X ray by using the number of views that are documented on the final radiology report. Do not just select the code for what the physician has ordered. The correct code should be 71045, 71046, 71047, or 71048 based on the report.