HCPCS Level II L5685: Below-Knee Prosthesis Suspension/Sealing Sleeve

HCPCS Level II code L5685 describes an addition to a below-knee lower extremity prosthesis consisting of a suspension/sealing sleeve (with or without a valve), supplied for use with a transtibial prosthetic socket; service type is prosthetic accessory/supply and the typical site of service is prosthetics/orthotics clinic or prosthetist fitting facility.

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HCPCS Level II L5685: Below-Knee Prosthesis Suspension/Sealing Sleeve

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Get alerted when payer policies referencing L5685 are released or updated.

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Clinical & Coding Specifications

Clinical Context

A 58-year-old male patient with a transtibial (below-knee) amputation presents to a prosthetics clinic for fitting and optimization of a definitive lower-extremity prosthesis. The patient reports mild pistoning and difficulty maintaining a consistent seal between the residual limb and the socket during activity. The prosthetist evaluates socket fit, residual-limb volume changes, and gait mechanics. To improve suspension and limb-socket interface integrity, the prosthetist selects an external suspension/sealing sleeve to be added to the existing prosthesis. The sleeve may be supplied with or without a valve depending on the socket design and the need for suction suspension.

The clinical workflow includes: referral or follow-up visit, prosthetic assessment and measurement, selection of appropriate sleeve size and material, application/instruction on donning and doffing, testing gait in clinic, patient education on wear time and skin inspection, and documentation of the device addition to the existing prosthesis. The service is billed as an addition to a lower extremity prosthesis, below knee, suspension/sealing sleeve, with or without valve, each (L5685). Typical sites of service are outpatient prosthetics clinics, hospital-based prosthetics departments, and specialized orthotics and prosthetics centers.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic(s) management and training: initial encounter, each 15 minutes	Used for training and education on donning/doffing and use of the suspension sleeve during initial fitting
`97763`	Orthotic(s)/prosthetic(s) fitting and training, upper and/or lower extremity, initial encounter	Used when formal prosthetic fitting and training is provided in clinic alongside sleeve provision
`20610`	Arthrocentesis, aspiration and/or injection; major joint or bursa (e.g., shoulder, hip, knee)	Occasionally used if concurrent injection or procedure on residual limb is required prior to definitive fitting (rare)
`99070`	Supplies and materials (except spectacles), provided by provider over and above those usually included with the office visit	Used for billing miscellaneous supplies directly related to fitting when allowed by payer
`97001`	Physical therapy evaluation	Used when a formal PT evaluation informs prosthetic needs and gait training associated with the sleeve fitting

Related Modifiers

5 rows

Modifier	Description	When to Use
52	Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…	- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
53	Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…	- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
78	CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…	- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…
22	Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…	- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
26	Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…	- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
261QP2300X	Primary Care Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center
2080P0208X	Pediatric Infectious Diseases Physician	A pediatrician trained to care for children in the diagnosis, treatment and prevention of infectious diseases. This specialist can apply specific know…
207ZN0500X	Neuropathology Physician	A neuropathologist is expert in the diagnosis of diseases of the nervous system and skeletal muscles and functions as a consultant primarily to neurol…
163WP0808X	Psychiatric/Mental Health Registered Nurse	Nursing Service Providers · Registered Nurse
2279C0205X	Critical Care Registered Respiratory Therapist	Respiratory emergencies are commonplace in the treatment of critical care patients. Included in the assessment measurements conducted by the respirat…
207RC0001X	Clinical Cardiac Electrophysiology Physician	A field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical proc…
1835S0206X	Solid Organ Transplant Pharmacist	A licensed pharmacist who has demonstrated specialized knowledge and skill delivering direct patient care and the safe and effective use of medication…
152WC0802X	Corneal and Contact Management Optometrist	The professional activities performed by an Optometrist related to the fitting of contact lenses to an eye, ongoing evaluation of the cornea's ability…

Related ICD-10-CM Codes

21 rows

ICD-10-CM Code	Description
G54.6	Phantom limb syndrome with pain
S78.011A	Complete traumatic amputation at right hip joint, initial encounter
S78.012A	Complete traumatic amputation at left hip joint, initial encounter
S78.021A	Partial traumatic amputation at right hip joint, initial encounter
S78.022A	Partial traumatic amputation at left hip joint, initial encounter
S78.111A	Complete traumatic amputation at level between right hip and knee, initial encounter
S78.112A	Complete traumatic amputation at level between left hip and knee, initial encounter
S78.121A	Partial traumatic amputation at level between right hip and knee, initial encounter
S78.122A	Partial traumatic amputation at level between left hip and knee, initial encounter
T79.A11A	Traumatic compartment syndrome of right upper extremity, initial encounter

Showing 1–10 of 21

HCPCS Level II L5000: Partial Foot Shoe Insert with Longitudinal Arch, Toe Filler

HCPCS-L5010-PARTIAL-FOOT-MOLDED-SOCKET-ANKLE-HEIGHT-TOE-FILLER

HCPCS L5010: Partial Foot Molded Socket, Ankle Height, With Toe Filler

HCPCS-L5020-PARTIAL-FOOT-MOLDED-SOCKET-TIBIAL-TUBERCLE-TOE-FILLER

HCPCS L5020: Partial Foot Molded Socket with Toe Filler

HCPCS-L5050-ANKLE-SYMES-MOLDED-SOCKET-SACH-FOOT

HCPCS L5050: Ankle/Symes Molded Socket with SACH Foot

HCPCS-L5060-ANKLE-SYMES-METAL-FRAME-MOLDED-LEATHER-SOCKET-ARTICULATED-ANKLE-FOOT

HCPCS L5060: Ankle/Symes Metal Frame with Molded Leather Socket

HCPCS-L5100-BELOW-KNEE-MOLDED-SOCKET-SHIN-SACH-FOOT

HCPCS Level II L5100: Below-Knee Molded Socket with Shin and SACH Foot

HCPCS-L5105-BELOW-KNEE-PLASTIC-SOCKET-SACH-FOOT

HCPCS L5105: Below-Knee Plastic Socket Prosthesis with SACH Foot

HCPCS-L5150-KNEE-DISARTICULATION-MOLDED-SOCKET-EXTERNAL-KNEE-SACH-FOOT

HCPCS L5150: Knee Disarticulation Molded Socket with External Knee and SACH Foot

HCPCS-L5160-KNEE-DISARTICULATION-MOLDED-SOCKET-BENT-KNEE-SACH-FOOT

HCPCS Level II L5160: Knee Disarticulation Molded Socket, Bent Knee Configuration

HCPCS-L5200-ABOVE-KNEE-MOLDED-SOCKET-SINGLE-AXIS-KNEE-SACH-FOOT

HCPCS Level II L5200: Above-knee Prosthesis with Molded Socket and Single-axis Knee

Showing 1–10 of 472

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic(s) management and training: initial encounter, each 15 minutes	Used for training and education on donning/doffing and use of the suspension sleeve during initial fitting
`97763`	Orthotic(s)/prosthetic(s) fitting and training, upper and/or lower extremity, initial encounter	Used when formal prosthetic fitting and training is provided in clinic alongside sleeve provision
`20610`	Arthrocentesis, aspiration and/or injection; major joint or bursa (e.g., shoulder, hip, knee)	Occasionally used if concurrent injection or procedure on residual limb is required prior to definitive fitting (rare)
`99070`	Supplies and materials (except spectacles), provided by provider over and above those usually included with the office visit	Used for billing miscellaneous supplies directly related to fitting when allowed by payer
`97001`	Physical therapy evaluation	Used when a formal PT evaluation informs prosthetic needs and gait training associated with the sleeve fitting

Related Modifiers

5 rows

Modifier	Description	When to Use
52	Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…	- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
53	Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…	- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
78	CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…	- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…
22	Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…	- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
26	Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…	- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
261QP2300X	Primary Care Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center
2080P0208X	Pediatric Infectious Diseases Physician	A pediatrician trained to care for children in the diagnosis, treatment and prevention of infectious diseases. This specialist can apply specific know…
207ZN0500X	Neuropathology Physician	A neuropathologist is expert in the diagnosis of diseases of the nervous system and skeletal muscles and functions as a consultant primarily to neurol…
163WP0808X	Psychiatric/Mental Health Registered Nurse	Nursing Service Providers · Registered Nurse
2279C0205X	Critical Care Registered Respiratory Therapist	Respiratory emergencies are commonplace in the treatment of critical care patients. Included in the assessment measurements conducted by the respirat…
207RC0001X	Clinical Cardiac Electrophysiology Physician	A field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical proc…
1835S0206X	Solid Organ Transplant Pharmacist	A licensed pharmacist who has demonstrated specialized knowledge and skill delivering direct patient care and the safe and effective use of medication…
152WC0802X	Corneal and Contact Management Optometrist	The professional activities performed by an Optometrist related to the fitting of contact lenses to an eye, ongoing evaluation of the cornea's ability…

Related ICD-10-CM Codes

21 rows

ICD-10-CM Code	Description
G54.6	Phantom limb syndrome with pain
S78.011A	Complete traumatic amputation at right hip joint, initial encounter
S78.012A	Complete traumatic amputation at left hip joint, initial encounter
S78.021A	Partial traumatic amputation at right hip joint, initial encounter
S78.022A	Partial traumatic amputation at left hip joint, initial encounter
S78.111A	Complete traumatic amputation at level between right hip and knee, initial encounter
S78.112A	Complete traumatic amputation at level between left hip and knee, initial encounter
S78.121A	Partial traumatic amputation at level between right hip and knee, initial encounter
S78.122A	Partial traumatic amputation at level between left hip and knee, initial encounter
T79.A11A	Traumatic compartment syndrome of right upper extremity, initial encounter

Showing 1–10 of 21

HCPCS Level II L5000: Partial Foot Shoe Insert with Longitudinal Arch, Toe Filler

HCPCS-L5010-PARTIAL-FOOT-MOLDED-SOCKET-ANKLE-HEIGHT-TOE-FILLER

HCPCS L5010: Partial Foot Molded Socket, Ankle Height, With Toe Filler

HCPCS-L5020-PARTIAL-FOOT-MOLDED-SOCKET-TIBIAL-TUBERCLE-TOE-FILLER

HCPCS L5020: Partial Foot Molded Socket with Toe Filler

HCPCS-L5050-ANKLE-SYMES-MOLDED-SOCKET-SACH-FOOT

HCPCS L5050: Ankle/Symes Molded Socket with SACH Foot

HCPCS-L5060-ANKLE-SYMES-METAL-FRAME-MOLDED-LEATHER-SOCKET-ARTICULATED-ANKLE-FOOT

HCPCS L5060: Ankle/Symes Metal Frame with Molded Leather Socket

HCPCS-L5100-BELOW-KNEE-MOLDED-SOCKET-SHIN-SACH-FOOT

HCPCS Level II L5100: Below-Knee Molded Socket with Shin and SACH Foot

HCPCS-L5105-BELOW-KNEE-PLASTIC-SOCKET-SACH-FOOT

HCPCS L5105: Below-Knee Plastic Socket Prosthesis with SACH Foot

HCPCS-L5150-KNEE-DISARTICULATION-MOLDED-SOCKET-EXTERNAL-KNEE-SACH-FOOT

HCPCS L5150: Knee Disarticulation Molded Socket with External Knee and SACH Foot

HCPCS-L5160-KNEE-DISARTICULATION-MOLDED-SOCKET-BENT-KNEE-SACH-FOOT

HCPCS Level II L5160: Knee Disarticulation Molded Socket, Bent Knee Configuration

HCPCS-L5200-ABOVE-KNEE-MOLDED-SOCKET-SINGLE-AXIS-KNEE-SACH-FOOT

HCPCS Level II L5200: Above-knee Prosthesis with Molded Socket and Single-axis Knee

Showing 1–10 of 472

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

OpenPayer

HCPCS Level II L5685: Below-Knee Prosthesis Suspension/Sealing Sleeve

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OpenPayer

HCPCS Level II L5685: Below-Knee Prosthesis Suspension/Sealing Sleeve

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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

References

HCPCS Level II L5685: Below-Knee Prosthesis Suspension/Sealing Sleeve

Sign up for hcpcs L5685 policy alerts

HCPCS Level II L5685: Below-Knee Prosthesis Suspension/Sealing Sleeve

Sign up for hcpcs L5685 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What does HCPCS code L5685 represent and where is it typically provided?

Which modifiers are commonly used with L5685 and when would they apply?

What CPT codes are commonly billed alongside L5685 for fitting, training, or related services?

Which payers are highlighted as relevant for coverage of L5685?

What clinical workflow and reasons for providing a suspension/sealing sleeve are described for L5685?

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What does HCPCS code L5685 represent and where is it typically provided?

Which modifiers are commonly used with L5685 and when would they apply?

What CPT codes are commonly billed alongside L5685 for fitting, training, or related services?

Which payers are highlighted as relevant for coverage of L5685?

What clinical workflow and reasons for providing a suspension/sealing sleeve are described for L5685?

References