Summary & Overview
CPT 11951: Collagen Injection, 1.1 cc to 5.0 cc Subcutaneous
CPT code 11951 designates the injection of 1.1 cc to 5.0 cc of collagen into the subcutaneous layer of skin, representing a defined volume range for soft-tissue augmentation. This code matters nationally for consistent reporting of collagen-based augmentation procedures used in dermatology, plastic surgery, and reconstructive contexts. Accurate use of this code supports clinical documentation, appropriate reimbursement, and monitoring of utilization for cosmetic and reconstructive care.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a national view of code definition, clinical context, common sites of service, and payer coverage considerations. Readers will find benchmarks for typical utilization ranges (where available), guidance on coding specificity tied to injected volume, and a summary of payer coverage themes. The report also outlines common modifier practice patterns and administrative considerations when billing collagen injections in outpatient and office-based procedural settings.
This summary is intended to give clinicians, billing professionals, and policy analysts a concise reference for CPT code 11951, clarifying what the code represents and what to expect in payer interactions and documentation requirements. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 11951 describes the injection of 1.1 cc to 5.0 cc of collagen into the subcutaneous layer of skin. This procedure is a soft tissue augmentation technique used to add volume and support to subcutaneous tissues.
Service type: Collagen injection for subcutaneous augmentation
Typical site of service: Outpatient procedure setting, commonly performed in dermatology, plastic surgery, or office-based procedural suites where minor cosmetic or reconstructive soft-tissue injections are provided.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult presenting to an outpatient dermatology or cosmetic surgery clinic seeking correction of moderate-to-severe facial soft-tissue deficits such as nasolabial folds, marionette lines, or contour irregularities following trauma or congenital deficiency. The provider confirms indications, reviews medical history including allergy to bovine-derived products, obtains informed consent, and documents baseline photographs. The procedure is performed in a procedure room or minor treatment suite (office-based clinical setting) with the patient reclined. Topical or local anesthesia is applied as indicated. The provider prepares the injection site using aseptic technique and injects a collagen implant into the subcutaneous layer, delivering between 1.1 cc and 5.0 cc per the coded parameter. Post-injection hemostasis is achieved, brief observation for immediate reaction occurs, and post-procedure instructions are provided. Follow-up is arranged to assess implant integration, effectiveness, and any complications such as infection, allergic reaction, or implant migration.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier required / not otherwise specified | Rarely used; default when no other modifier applies |
11 | Office or outpatient E/M services by the physician | Use when reporting an evaluation and management service during the same encounter that meets payer rules |
22 | Increased procedural services | Use when the procedure requires substantially greater work than usual and documentation supports the increased complexity |
26 | Professional component | Use if reporting only the professional component when applicable (e.g., interpretation of ancillary services) — generally not applicable to direct injection services |
50 | Bilateral procedure | Use when identical procedures are performed on both sides of the face in the same session when payer allows bilateral modifiers |
51 | Multiple procedures | Use when additional distinct procedures are performed the same day and payer requires multiple procedure modifier reporting |
52 | Reduced services | Use when the service performed is partially reduced or discontinued |
53 | Discontinued procedure | Use when procedure is started but discontinued due to extenuating circumstances |
59* | Distinct procedural service | When a separate and distinct procedure is performed; NOTE: 59 is not in the provided list so do not bill it — see XS below |
62 | Two surgeons | Use when two surgeons work together as primary surgeons on the same procedure |
63 | Procedure performed on infants less than 4 kg | Not commonly applicable; include only when patient meets weight criteria |
66 | Surgical team | Use when a surgical team provides the service |
73 | Discontinued outpatient hospital/ambulatory surgery before anesthesia | Use when procedure is discontinued prior to anesthesia in appropriate facility |
78 | Unplanned return to operating/procedure room by same physician following initial procedure for a related procedure during postoperative period | Use when a return to the procedure room is needed for a related procedure |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207M00000X | Dermatology | Primary specialty performing cosmetic and reconstructive skin injections |
2084P0800X | Plastic Surgery | Performs soft-tissue augmentation and reconstructive collagen injections |
208D00000X | Facial Plastic Surgery | Focused on aesthetic facial soft-tissue procedures |
208000000X | Otolaryngology | May perform facial soft-tissue augmentation in reconstructive cases |
207L00000X | Cosmetic Surgery | Providers specializing in cosmetic injectable procedures |
*Note: 59 is not in the provided modifier list; alternative distinct procedural modifiers such as XS are available in the provided list and may be used per payer rules.
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
L90.5 | Scar conditions and fibrosis of skin | Collagen implants used to correct contour deformities from scarring |
Q67.4 | Facial asymmetry, congenital | Used in reconstructive augmentation for congenital facial soft-tissue deficits |
T79.8 | Other complications of injury, not elsewhere classified | May relate to soft-tissue deficits post-trauma requiring augmentation |
L98.9 | Disorder of skin and subcutaneous tissue, unspecified | General coding when a more specific diagnosis is not available for soft-tissue augmentation |
Z41.1 | Encounter for cosmetic surgery | Coded when the procedure is elective and cosmetic in nature |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
11950 | Injection, collagen; 0.5 cc or less | Lower volume collagen injection; may be billed for smaller-volume treatments when performed instead of 11951 |
11952 | Injection, collagen; more than 5.0 cc | Higher-volume collagen injection; used when total injected volume exceeds the 11951 range |
15770 | Dermaplane; epidermal or superficial dermal repair | Adjunctive soft-tissue preparation or minor debridement performed prior to injectable treatment in some workflows |
99199 | Unlisted miscellaneous service; provider-based | Use for reporting an unlisted adjunctive service related to the procedure when no specific CPT exists |
99499 | Unlisted evaluation and management service | Use for reporting unlisted E/M-related services when standard E/M codes do not accurately describe the encounter |
If additional site-specific or payer-preferred CPTs are required in the clinical workflow, those are selected per facility and payer billing rules.