Radiology Billing: Global vs. Professional vs. Technical Component

Most imaging codes split into a professional component, billed with modifier 26 for the interpretation and report, and a technical component, billed with modifier TC for the equipment, staff and supplies. Billing the code with no modifier claims both. The error to prevent is a global claim from a practice that furnished only one half.

Radiology billing looks simple from the outside: one CPT code per study. The difficulty is that the same code can be billed three ways, by different entities, depending on who owns the scanner and where the patient was registered. A radiology billing team has to get that split right on every claim before coding accuracy even comes into it.

Three ways to bill one study

AAPC’s Knowledge Center (14 October 2020) explains the split. CPT Appendix A instructs coders to append modifier 26 to report only the professional component, which covers the physician’s supervision, interpretation and written report. Modifier TC reports only the technical component, meaning the equipment, supplies, personnel and related costs. When one provider furnishes both, it reports the global service: the code with neither modifier.

AAPC gives the simplest example in its 1 March 2023 radiology tips: a radiologist who reads a two-view chest X-ray in the hospital reports 71046 with modifier 26, while a radiologist whose own office supplies the equipment reports 71046 with no modifier.

Check the PC/TC indicator before you append anything

Whether a code can be split at all is set by Medicare, not by the coder. Every code in the Medicare Physician Fee Schedule relative value file carries a PC/TC indicator. Attachment A of CMS’s RVU26D file (released 26 August 2026) defines the ones radiology teams see most:

• 1: diagnostic tests with both components. Modifiers 26 and TC can be used.
• 0: physician services, such as visits and surgical procedures. Modifiers 26 and TC cannot be used.
• 2 and 3: stand-alone professional-only and technical-only codes. Modifiers 26 and TC cannot be used.
• 4: stand-alone global-only codes. Modifiers 26 and TC cannot be used.

For indicators 0, 2, 3 and 4, Attachment A states plainly that modifiers 26 and TC cannot be used, so a technical-only code billed with modifier 26 is wrong on its face.

Three common studies show how the split works. Descriptors come from AAPC: 76700 is “Ultrasound, abdominal, real time with image documentation; complete” and 71046 is “Radiologic examination, chest; 2 views” (AAPC, 1 March 2023); 72148 is “Magnetic resonance (eg, proton) imaging, spinal canal and contents, lumbar; without contrast material” (AAPC Orthopedic Coding Alert, 26 September 2016). All three carry PC/TC indicator 1 in RVU26D, and the professional and technical RVUs add up to the global value:

Non-facility total RVUs, CMS RVU26D, 26 August 2026.

The technical component is most of the value for all three. That is why a lost TC line matters more than a lost read.

Two of them also carry multiple procedure indicator 4 in RVU26D (76700 and 72148; 71046 carries 0). Under the file layout’s definition, when qualifying imaging studies are billed for the same session on the same day, the highest-priced technical component is paid in full and each subsequent one at 50 percent, and subsequent professional components are reduced by 5 percent. Expect those reductions on the remittance before calling them underpayments.

Who bills what, by setting

The Medicare Claims Processing Manual, Chapter 13, sets the rules by setting:

• Hospital patients. Section 20.1 says the professional component is paid under the physician fee schedule in all settings. Section 20.2.1 says Medicare Administrative Contractors may not pay the technical component for hospital patients: it is in the hospital’s inpatient payment, and outpatient radiology is paid to the hospital under the Outpatient Prospective Payment System. The reading radiologist bills with modifier 26.
• Offices and freestanding centers. Section 20.2.2 says the technical component is paid under the fee schedule for patients who are not hospital patients and are seen in a physician’s office, a freestanding imaging center or another non-hospital setting. If the same practice also reads the study, it bills globally.
• IDTFs. Under 42 CFR 410.33(a), an independent diagnostic testing facility is independent of a physician’s office or hospital, can be a fixed location or a mobile entity, and is paid for diagnostic procedures under the physician fee schedule. When an outside radiologist reads for an IDTF, agree in advance who bills which component so neither side bills globally.
• Leased departments. Section 20.2.3 says that when a patient who is neither an inpatient nor an outpatient is imaged in a leased hospital radiology department, both components are payable under the fee schedule.

One denial pattern deserves a flag. Section 20.2.1 describes a Common Working File edit that compares supplier technical-component lines with inpatient admission and discharge dates. A TC line with a date of service inside an inpatient stay is recouped, even if it originally paid.

The anti-markup rule

When a practice orders a test and bills for a component it purchased from someone else, 42 CFR 414.50 limits what it can collect. If the performing physician does not share a practice with the billing physician or supplier, payment for that component cannot exceed the lowest of:

1. the performing supplier’s net charge to the billing entity,
2. the billing entity’s actual charge, or
3. the fee schedule amount the performing supplier would have been paid billing directly.

The regulation says a performing physician shares a practice if at least 75 percent of his or her professional services are furnished through the billing entity, or if the physician is an owner, employee or independent contractor and the component is performed in the billing entity’s office. The billing entity must identify the performing supplier and its net charge on the claim. If it does not, CMS makes no payment and the beneficiary cannot be billed. Chapter 13, §20.3 repeats the same limits for radiology.

Ordering practices that buy reads from a teleradiology group, or buy scans from a mobile unit, need their contracts and claims set up for this before the first claim goes out.

Where radiology claims deny

• Duplicate global claims. The hospital billed the technical component and the radiologist billed globally.
• Modifiers on codes that cannot be split. 26 or TC on a code with PC/TC indicator 0, 2, 3 or 4.
• Incomplete studies. AAPC’s 1 March 2023 tips list the organs a complete abdominal ultrasound must document: liver, gallbladder, common bile duct, pancreas, spleen, kidneys, upper abdominal aorta and inferior vena cava. If one is missing, the study is coded as limited, 76705.
• No report. Section 20.1 says the interpretation of a diagnostic procedure includes a written report. No signed report means no professional component.

Cardiology groups run into the same split on echocardiograms and stress tests; our echo and stress test billing post on 26/TC rules covers that side.

Questions to ask a radiology billing partner

1. Do you check the PC/TC indicator on every line, every year?
2. How do you prevent duplicate global and technical claims with hospital partners?
3. How do you handle anti-markup claims for purchased reads or scans?
4. Do you catch technical lines that fall inside an inpatient stay before they are recouped?

Coding quick-references live in the AMS resources library. When the professional, technical and global split is where your claims keep failing, that is the work our team has handled for practices since 1992 as part of our radiology billing services.