The American Medical Association (AMA) has released its latest update to the CPT Category III code set, adding 58 codes for emerging medical technologies, procedures, and services.
The update also revises three existing liver perfusion codes. Although the codes were published in July 2026, they are not effective for reporting until January 1, 2027.
The new codes cover a wide range of rapidly developing services, including artificial intelligence, oncology, neuromodulation, organ perfusion, orthopedic implants, gene therapy delivery, cardiology, and computer-assisted surgical imaging.
Understanding Category III Codes
Category III CPT codes are temporary codes used to identify emerging technologies, services, procedures, and models of care. They allow providers, payors, researchers, and other stakeholders to collect utilization and outcome information before a service meets the requirements for a permanent Category I code.
Unlike Category I codes, a Category III code does not necessarily indicate that the service is widely performed throughout the country or supported by an established reimbursement pathway.
The AMA explains that Category III codes may be used to collect information needed to demonstrate broader clinical use, support research, or assist with regulatory review. A Category III code generally remains active for five years unless it is extended, replaced by a Category I code, or otherwise revised. The AMA explains the purpose and publication schedule for Category III codes here .
58 New Codes for 2027
The July update includes:
- 32 new Category III codes from 1054T through 1085T, approved during the February 2026 CPT Editorial Panel meeting.
- 26 new Category III codes from 1086T through 1111T, approved during the May 2026 meeting.
- Revisions to codes 0894T, 0895T, and 0896T involving normothermic liver allograft machine perfusion.
Several codes are resequenced within the Category III section. This means they will not necessarily appear in simple numerical order in the 2027 CPT codebook. Coders should rely on the official CPT placement, guidelines, and cross-references rather than assuming that every code will appear sequentially.
The AMA's July publication begins a six-month implementation period, giving providers, payors, and software vendors time to prepare for the January 1, 2027, effective date. The complete early-release code information is available in the AMA's Category III code document .
Liver Perfusion Codes Revised
Codes 0894T-0896T are being revised to clarify the individual components of normothermic machine perfusion of a donor liver.
The revisions distinguish among:
- Cannulation of the liver allograft.
- Connection to the perfusion device and initial monitoring.
- Additional monitoring and management.
New codes also address decannulation and hypothermic oxygenated liver perfusion, including cannulation, connection, monitoring, and removal from the perfusion device.
These changes will require transplant centers to review operative documentation carefully. The medical record should clearly identify the type of perfusion, the work performed, and the amount of monitoring time.
Artificial Intelligence Continues to Expand
A notable portion of the update involves algorithmic analysis and other technology-assisted services.
New Category III codes describe applications such as:
- Algorithmic analysis of bladder cancer tissue to estimate recurrence, progression and treatment response.
- Analysis of pancreatic cancer tissue to predict response to different chemotherapy approaches.
- Analysis of breast and prostate cancer tissue to estimate future metastatic risk.
- Computer-assisted assessment of previously acquired PET or PET/CT studies.
- Algorithmic analysis of coronary angiography to estimate coronary fractional flow.
- Noninvasive cardiopulmonary assessment using algorithmically analyzed physiologic signals.
- Personalized neurostimulation settings derived from EEG and ECG information.
These services may fall within the AMA's CPT taxonomy for assistive or augmentative artificial intelligence. The distinction depends on how the technology contributes to the clinical service and the role of the physician or other qualified healthcare professional.
Coders should not assign an AI-related code simply because software was used. Documentation must support the specific clinical analysis, data inputs, professional involvement, and report described by the code.
New Surgical and Procedural Technologies
The 2027 additions also recognize several emerging surgical and interventional technologies.
Examples include services involving:
- Ultrasonic propulsion of residual kidney stone fragments following lithotripsy.
- Radiofrequency ablation of a lumpectomy cavity.
- Cochlear infusion of a pharmacologic or gene therapy agent.
- Supraorbital and occipital neurostimulator implantation, revision, removal, and programming.
- Transcervical intratubal artificial insemination.
- Drug-eluting implants attached to intraocular lens prostheses.
- Permanent common carotid artery filters.
- Acellular scaffold implantation for knee cartilage defects.
- Bone marrow aspirate concentrate used with orthopedic scaffolds or injected into a musculoskeletal treatment site.
- Placement of a subretinal prosthesis.
- High-intensity focused ultrasound treatment of incompetent extremity veins.
- Transcutaneous spinal neuromodulation provided with therapeutic activities.
- Stereotactic delivery of therapeutic agents into the brain.
Additional codes describe computer-assisted fluorescence imaging used for intraoperative assessment of lung, ovarian, tubal, and peritoneal tumor tissue.
A New Code Does Not Guarantee Payment
The assignment of a Category III code does not establish Medicare or commercial payor coverage.
Category III codes are not referred to the AMA/Specialty Society Relative Value Scale Update Committee for valuation, and they are not assigned standard relative value units through the usual CPT process. Payment depends on the individual payor's medical policies, contracts, and claims-processing rules.
A payor may:
- Cover the service under defined medical-necessity criteria.
- Require prior authorization.
- Request medical records or published clinical evidence.
- Consider the service investigational.
- Establish a carrier-priced or negotiated payment.
- Deny the service as noncovered.
Practices should verify coverage before performing a high-cost emerging service. The existence of a code means the service can be identified and tracked; it does not guarantee that a payor will reimburse it.
Documentation Will Be Critical
Many of the new codes contain detailed requirements regarding imaging guidance, device placement, algorithmic analysis, monitoring time, laterality, and add-on reporting.
Documentation should identify:
- The exact technology or procedure performed.
- The clinical indication for the service.
- The physician or qualified healthcare professional's involvement.
- The source data analyzed by an algorithm.
- Whether the analysis was assistive, augmentative, or otherwise defined by CPT.
- The required interpretation or automated report.
- Imaging guidance included in the procedure.
- Laterality, number of treatment sites, or trajectories.
- Monitoring or programming time.
- Any primary procedure required with an add-on code.
Coders must also review the parenthetical instructions. Several of the new codes cannot be reported with designated imaging, pathology, stimulation, or surgical codes when those services are included in the Category III procedure.
Preparing for January 2027
Organizations providing emerging-technology services should begin implementation planning now.
Recommended steps include:
- Identify which of the 58 new codes apply to the organization's specialties and services.
- Review the final 2027 CPT codebook before reporting the codes.
- Update charge masters, EHR systems, encoder software, and claim edits.
- Educate physicians about the documentation required for the new services.
- Review payor policies and prior authorization requirements.
- Determine whether a specific payment rate has been established.
- Check the National Correct Coding Initiative edits and Medicare guidance when available.
- Monitor early claims for denials, requests for records, and inconsistent payor processing.
The Bottom Line
The latest Category III update demonstrates how quickly medical coding is evolving alongside artificial intelligence, advanced imaging, neuromodulation, gene therapy, and new surgical technology.
The 58 new codes and three revised liver perfusion codes become effective January 1, 2027. Providers should use the implementation period to evaluate documentation, coverage and system requirements—but should not report the new codes before their effective date.
Reference: American Medical Association, CPT Category III Codes, updated July 10, 2026.
CPT® is a registered trademark of the American Medical Association. This article is for educational purposes and does not replace the official CPT codebook, payor guidance, or individual coverage policies.
By Billing-Coding.com