Summary & Overview
CPT 4256F: Anesthesia for Less Than One Hour
CPT code 4256F indicates documentation that a patient received anesthesia for less than one hour. Nationally, brief anesthesia encounters occur across surgical specialties and ambulatory procedures; clear documentation supports coding accuracy, quality measurement, and appropriate claims processing. Key payers commonly involved in coverage and claims review include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
This publication provides a concise overview of CPT code 4256F, explaining its clinical context and significance for billing and records. Readers will find benchmarks and practical guidance on where the code is applied, common service settings, and how the code fits into anesthesia service reporting. The report also highlights policy considerations and recent payer approaches to short-duration anesthesia documentation.
Intended for coding professionals, anesthesia clinicians, and revenue cycle staff, the summary clarifies when CPT code 4256F is used and what to expect from major payers in national practice. Data not available in the input are noted where applicable.
Billing Code Overview
CPT code 4256F documents that the patient undergoes anesthesia for less than an hour. This billing code reflects a brief anesthesia service typically associated with procedures requiring sedation or general anesthesia of under 60 minutes in duration.
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Service type: Short-duration anesthesia service
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Typical site of service: Operating room, ambulatory surgical center, or procedural suite where brief anesthetic care is provided
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult scheduled for a short-duration procedure requiring general anesthesia or monitored anesthesia care lasting less than one hour. An example scenario is a 45-year-old outpatient undergoing excision of a small benign facial lesion under general anesthesia with airway support but rapid turnover. Pre-procedure workflow includes pre-anesthesia evaluation by the anesthesia clinician, review of medical history and medications, airway assessment, informed consent, placement of standard monitors, induction of anesthesia, performance of the brief procedure, emergence, and post-anesthesia recovery and discharge from the PACU. The care team often includes an anesthesiologist or certified registered nurse anesthetist (CRNA), a proceduralist (e.g., ENT, dermatologic surgeon), nursing staff, and PACU personnel. Typical sites of service are ambulatory surgical centers and hospital outpatient departments where short procedures with brief anesthesia services are performed. Documentation must clearly state anesthesia start and stop times, total anesthesia time under one hour, pre- and post-anesthesia assessments, and any intraoperative events that affect billing or coding.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service by the same physician on the same day of the procedure | Use when a separate E/M visit meets full documentation requirements in addition to the procedure |
59 | Distinct procedural service | Use to indicate a procedure or service was distinct and separate from other services on the same day |
24 | Unrelated E/M service by the same physician during a postoperative period | Use when an unrelated E/M visit occurs during the postoperative period |
26 | Professional component | Use when only the professional component of a service is reported separately |
TC | Technical component | Use when only the technical component of a service is reported separately |
GA | Waiver of liability statement on file — patient refuses Medicare assignment | Use when a voluntary ABN or waiver is on file for non-covered services |
QX | CRNA service with physician absent (modifiers used for Medicare reporting) | Use when a CRNA provides anesthesia without medical direction by an anesthesiologist |
QY | Medical direction of one CRNA by an anesthesiologist | Use when the anesthesiologist medically directs CRNAs per Medicare rules |
GC | Service performed in part by a resident under supervision | Use to indicate participation of a teaching physician when required |
52 | Reduced services | Use when a service was partially reduced or not completed as described |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207L00000X | Anesthesiology | Physicians who provide anesthesia services for short procedures |
367A0000X | Anesthesiology Assistant | Clinicians who assist anesthesiologists in perioperative care |
363A00000X | Nurse Anesthetist | CRNAs who frequently provide anesthesia in ASC and hospital settings |
208U00000X | Otolaryngology (ENT) | Proceduralists who may perform brief airway or head/neck procedures requiring short GA |
207K00000X | Dermatology | Proceduralists performing minor surgical excisions requiring brief anesthesia |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
Data not available in the input. | Data not available in the input. | Data not available in the input. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
00100 | Anesthesia for procedures on salivary glands, including biopsy | Example of an anesthesia code for short head/neck procedures that may require <1 hour of anesthesia |
00790 | Anesthesia for intrathoracic procedures in the chest (diagnostic procedures) | Represents anesthesia services for brief diagnostic thoracic procedures performed in an ambulatory setting |
00902 | Anesthesia for procedures on nose and accessory sinuses | Commonly paired when short ENT procedures require monitored anesthesia care or general anesthesia |
99100 | Anesthesia for patient of extreme age, younger than 1 or older than 70 (not commonly used alone) | May be reported when patient age increases anesthesia risk for short procedures |
99116 | Anesthesia services for cancellation before induction (when applicable) | Used if the procedure is canceled after anesthesia preparation but before induction |
01999 | Unlisted anesthesia procedure | Used when no specific anesthesia code accurately describes the service for an unusual short procedure |