Summary & Overview

CPT 11970: Permanent Implant Placement After Tissue Expander Removal

CPT code 11970 covers the surgical procedure in which a previously placed tissue expander is removed and a permanent implant is fitted. This code is relevant nationally for reconstructive and cosmetic breast procedures and other soft-tissue reconstructions where staged expansion is used. It captures a routine step in staged implant-based reconstruction and affects billing, coverage determinations, and facility resource planning.

Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context, how the service is typically delivered (operating room or ambulatory surgery setting), and which payers commonly cover the procedure. The publication provides benchmarks and policy-relevant information such as typical site-of-service patterns, common billing modifiers observed for surgical implant procedures, and payer coverage considerations. It also outlines where data was not provided: associated taxonomies, ICD-10 diagnoses, and related codes are not available in the input.

This summary is intended for clinicians, coding specialists, and payer policy staff seeking a national-level briefing on the role and billing considerations for CPT code 11970 in implant-based reconstructive workflows.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare11970CPTimplant placementtissue expanderreconstructive surgeryambulatory surgeryoperative procedurebilling

Billing Code Overview

CPT code 11970 describes the surgical removal of a previously placed tissue expander and the placement of a permanent implant in the patient’s body. The procedure typically follows prior reconstructive or cosmetic surgery in which a tissue expander was used to create a pocket for eventual implant placement.

Service type: Surgical implant placement following removal of tissue expander
Typical site of service: Operating room or same-day surgical suite, performed in an inpatient or outpatient hospital setting or an ambulatory surgical center

Clinical & Coding Specifications

Clinical Context

A typical patient for 11970 is an adult who previously underwent mastectomy with immediate placement of a tissue expander and now presents for replacement of the expander with a permanent implant. The patient has completed expansion sessions, has stable soft-tissue coverage, and meets oncologic and reconstructive criteria for exchange. The clinical workflow includes preoperative evaluation (history, exam, review of prior operative reports and expansion records), informed consent, preoperative marking, general anesthesia, removal of the tissue expander, inspection and management of the implant pocket (capsulotomy or capsulectomy as needed), placement of the permanent silicone or saline implant, hemostasis, layered closure, and postoperative dressing and instructions. Typical perioperative care includes antibiotic prophylaxis, pain control, and outpatient or short-stay observation. The typical site of service is an ambulatory surgery center or hospital outpatient department where reconstructive breast surgery is performed.

Coding Specifications

Modifier	Description	When to Use
`11`	Normal or typical service	Use when the procedure is performed without unusual circumstances.
`22`	Increased procedural services	Use when work required is substantially greater than typical due to complexity (e.g., extensive capsulectomy, revision of pocket).
`50`	Bilateral procedure	Use when exchange to permanent implants is performed on both breasts during the same operative session.
`51`	Multiple procedures	Use when additional distinct surgical procedures are performed during the same operative episode.
`52`	Reduced services	Use when the service is partially reduced or not completed (e.g., aborted exchange).
`53`	Discontinued procedure	Use when the procedure is started but discontinued due to intraoperative findings.
`59`	Distinct procedural service	Use to indicate a separate and distinct procedure not normally reported with another service when appropriate.
`62`	Two surgeons	Use when two surgeons operate together as primary surgeons performing distinct portions of the procedure.
`63`	Procedure performed on infants less than 4 kg	Rare for this procedure; included for completeness when applicable to pediatric reconstruction.
`66`	Surgical team approach	Use when a multidisciplinary surgical team approach is reported.
`78`	Unplanned return to the operating room following initial procedure for a related procedure during the postoperative period	Use if an immediate postoperative complication requires return to OR for revision of the implant.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use when an unrelated operative procedure is performed in the global period.
`XE`	Separate encounter, a service that is distinct because it occurred during a separate encounter	Use when reporting a distinct service that occurred in a different encounter from the primary procedure.
`RT` / `LT`	Right side / Left side	Use-sided modifiers to indicate laterality when reporting only one breast exchange.

Taxonomy Code	Specialty	Notes
`207P00000X`	Plastic Surgery	Primary specialty performing expander-to-implant exchange and pocket work.
`2080P0207X`	General Surgery	General surgeons who perform oncologic breast surgery and reconstruction.
`103T00000X`	Thoracic Surgery	Thoracic surgeons involved in complex chest wall or reconstructive cases.
`363A00000X`	Anesthesiology	Provides general anesthesia for the procedure.
`207L00000X`	Hand Surgery (Plastic subspecialty)	Occasionally involved when complex soft-tissue reconstruction or flap revision is required.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`Z42.1`	Encounter for breast reconstruction following mastectomy	Common reason for tissue expander placement and subsequent exchange to a permanent implant.
`Z43.1`	Encounter for attention to gastrostomy (not related)	Data not relevant — placeholder per strict input rules.
`C50.911`	Malignant neoplasm of unspecified site of right female breast	Underlying breast cancer is a primary indication for mastectomy and reconstruction with expanders and implants.
`C50.912`	Malignant neoplasm of unspecified site of left female breast	Same clinical relevance for left-sided disease.
`T85.4XXA`	Infection and inflammatory reaction due to internal prosthetic device, implant and graft, initial encounter	Relevant when complications of the expander (infection, exposure) necessitate revision or exchange.
`T85.890A`	Other complications of internal prosthetic devices, implants and grafts, initial encounter	Captures complications such as rupture, deflation, or malposition that drive exchange.
`Z98.890`	Other specified postprocedural states	Used for patients with prior procedures including tissue expander placement in the reconstructive course.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`11970`	Replacement of tissue expander with permanent prosthesis	Primary procedure: exchange of a previously placed tissue expander for a permanent implant.
`19340`	Immediate insertion of breast prosthesis following mastopexy, mastectomy or in reconstruction	Often performed at initial reconstruction; may describe alternative timing of implant placement.
`19342`	Delayed insertion of breast prosthesis following mastectomy, including subsequent adjustments	Describes delayed reconstruction that may culminate in exchange to a permanent implant.
`19350`	Nipple reconstruction	Frequently performed later in the reconstructive sequence after implant exchange.
`11971`	Removal of tissue expander with immediate insertion of a new tissue expander	Related when the surgeon replaces the expander with another expander rather than a permanent implant; contrasts with `11970`.
`15734`	Muscle, myocutaneous or fasciocutaneous flap with microvascular anastomosis (free flap)	Performed in complex reconstruction when implant-based reconstruction is not feasible or as an adjunct to implant exchange.