Summary & Overview
CPT 4164F: Undefined Procedural Performance Measure
CPT code 4164F is listed without a descriptive summary in the source input. As a CPT-coded performance measure, it denotes a specific procedural or quality metric within the Current Procedural Terminology system. Although the precise clinical action or reporting element is not provided, CPT Category II–style formatting (a digit string with an appended letter) typically identifies measures or supplemental tracking codes used in quality reporting and administrative workflows.
This publication addresses national implications of an undefined CPT performance code: how payers treat unmapped or undocumented CPT entries, the relevance of such codes for claims processing and quality measurement, and where stakeholders find authoritative definitions. Key payers referenced for comparative context include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an outline of likely use cases, the consequences of missing code metadata for billing and reporting, and guidance on sources to consult for authoritative code definitions. The piece also summarizes what benchmarking and policy information would be needed to evaluate utilization and reimbursement, noting where input data is missing and must be obtained from code registries or payer policy manuals.
Billing Code Overview
CPT code 4164F: No Summary found for this code. This entry represents a procedural performance measure defined within the CPT coding framework. Based on the available description, the service type for CPT code 4164F is not specified beyond the label provided. The typical site of service is not specified in the input and therefore is unknown.
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult presenting to an otolaryngology clinic with chronic nasal obstruction, recurrent sinusitis, or nasal polyposis failing medical therapy. After history, nasal endoscopy, and CT imaging of the paranasal sinuses, the otolaryngologist determines the patient requires an in-office diagnostic or therapeutic nasal procedure. The clinical workflow includes: initial evaluation and consent; topical and/or local anesthesia; targeted nasal endoscopy and visualization; performance of the nasal procedure (biopsy, polypectomy, culturing, debridement, or limited endoscopic intervention); hemostasis; brief recovery and discharge with post-procedure instructions. Typical site of service is an ambulatory clinic or office-based procedure room with appropriate monitoring and access to pathology or microbiology if specimens are obtained.
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 distinct E/M visit is performed and documented on the same day as the procedure |
59 | Distinct procedural service | Use to indicate a separate procedure or site on the same day not normally reported together |
76 | Repeat procedure by same physician | Use when the exact procedure is repeated by the same provider during the same day |
77 | Repeat procedure by another physician | Use when the exact procedure is repeated by a different provider the same day |
78 | Return to the operating room for a related procedure during the postoperative period | Use when the patient returns to the OR for a related complication in the postop period |
79 | Unrelated procedure or service by the same physician during the postoperative period | Use for an unrelated procedure during global period |
50 | Bilateral procedure | Use when the procedure is performed on both sides and unilateral CPT reporting is standard |
22 | Increased procedural services | Use when service requires substantially greater effort than typical and supporting documentation is present |
52 | Reduced services | Use when a service is partially reduced or not completed |
24 | Unrelated E/M service during postoperative period | Use when an E/M visit during the postop period is unrelated to the procedure |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207Y00000X | Otolaryngology (ENT) | Primary specialty performing nasal and sinus procedures |
| 208D00000X | Surgery — General | Surgeons who may perform related endoscopic nasal procedures in certain settings |
| 363A00000X | Nurse Practitioner | NPs in ENT clinics who may assist, provide follow-up, and perform certain in-office procedures per state scope |
| 163W00000X | Physician Assistant | PAs who assist with procedures and provide peri-procedural care |
| 207L00000X | Head and Neck Surgery | Subspecialists performing advanced endoscopic sinonasal surgery |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
| Data not available in the input. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
31231 | Nasal/sinus endoscopy, diagnostic, unilateral or bilateral (separate procedure) | Often performed immediately before or during in-office nasal procedures for visualization and guidance |
31237 | Nasal/sinus endoscopy, surgical, with biopsy, polypectomy or debridement (separate procedure) | Commonly performed for tissue diagnosis or removal of polyps during the same encounter |
31575 | Laryngoscopy, flexible fiberoptic, diagnostic | May be used in the same evaluation when airway or laryngeal symptoms coexist |
31505 | Diagnostic laryngoscopy and tracheoscopy, direct or indirect (separate procedure) | Occasionally performed in the peri-procedural assessment when related symptoms require visualization |
69210 | Removal impacted cerumen (separate procedure) | Example of an office-based ENT procedure that may be performed in the same clinic setting when multiple minor procedures are needed |