HCPCS Level II L2390: Addition to Lower Extremity, Offset Knee Joint

HCPCS Level II code L2390 describes an addition to a lower extremity prosthesis for an offset knee joint, billed per joint, representing fabrication or attachment of an offset knee component to a lower-limb prosthetic device; service type: prosthetic component fabrication/adjustment; typical site of service: prosthetics clinic, orthotics and prosthetics (O&P) facility, or outpatient prosthetic service setting.

Customize your policy alerts

Sign up for hcpcs L2390 policy alerts

Get alerted when payer policies referencing L2390 are released or updated.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Explore openpayer tools

View all tools

HCPCS Level II L2390: Addition to Lower Extremity, Offset Knee Joint

Customize your policy alerts

Sign up for hcpcs L2390 policy alerts

Get alerted when payer policies referencing L2390 are released or updated.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Clinical & Coding Specifications

Clinical Context

A 68-year-old patient with a transtibial or transfemoral amputation presents for orthotic fitting following knee instability or malalignment related to a prosthetic knee component. The prosthetist evaluates the residual limb, gait, and prosthesis alignment in the clinic or outpatient prosthetics facility and determines that an offset knee joint addition to the lower-extremity prosthesis is required to improve mediolateral stability and stance-phase alignment. The service typically occurs in a prosthetics workshop or outpatient orthotics and prosthetics clinic. The workflow includes patient assessment, casting or scanning of the socket interface (if needed), fabrication or ordering of the offset knee joint component (L2390) to match the prosthesis side (LT or RT), bench alignment, fitting, and gait training. A follow-up visit for adjustments and functional testing is commonly scheduled. Documentation includes the prosthetist’s clinical assessment, justification for the offset knee joint, measurements, component serial number, modifier(s) as applicable, and functional outcomes.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic(s)/prosthetic(s) management and training, initial encounter; simple, each 15 minutes	Used for patient training and education after delivery of the offset knee joint.
`97763`	Orthotic and prosthetic supply management, continuing orthotic/prosthetic care; established patient, prosthetic training, each 15 minutes	Used for follow-up adjustment and continuing prosthetic care after fitting the offset knee joint.
`99070`	Supplies and materials (except spectacles), provided by the physician over and above those usually included with the office visit or other services	Billed when additional materials or small parts are furnished with the offset knee joint.
`L-code`	Data not available in the input.	Data not available in the input.

Related Modifiers

5 rows

Modifier	Description	When to Use
59	Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…	- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
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…
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…
2P	Modifier -2P is a Category II performance‑measure exclusion appended to a CPT Category II (quality) code when the provider did not perform the measured action because of patient‑related reasons (for…	- Use modifier 2P only with CPT Category II (performance‑measure) codes when a patient‑specific reason prevented performance of the measured action (for example, patient refusal, economic or social…
74	Modifier ‑74 indicates an outpatient hospital or ASC procedure that was discontinued after anesthesia was administered and after the procedure had begun. Use this modifier when anesthesia (local,…	- Use modifier -74 when a procedure in an outpatient hospital or ASC setting is terminated after anesthesia has been administered and after the procedure has commenced (for example, after incision,…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
332B00000X	Durable Medical Equipment & Medical Supplies	A supplier of medical equipment such as respirators, wheelchairs, home dialysis systems, or monitoring systems, that are prescribed by a physician for…
207Q00000X	Family Medicine Physician	Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadt…
171M00000X	Case Manager/Care Coordinator	A person who provides case management services and assists an individual in gaining access to needed medical, social, educational, and/or other servic…
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…
103T00000X	Psychologist	A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, a…
164X00000X	Licensed Vocational Nurse	An individual with post-high school vocational training and practical experience in the provision of nursing care at a level less than that required f…
202K00000X	Phlebology Physician	Phlebology is the medical discipline that involves the diagnosis and treatment of venous disorders, including spider veins, varicose veins, chronic ve…
261QS0132X	Ophthalmologic Surgery Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center

Related ICD-10-CM Codes

21 rows

ICD-10-CM Code	Description
G71.3	Mitochondrial myopathy, not elsewhere classified
M05.761	Rheumatoid arthritis with rheumatoid factor of right knee without organ or systems involvement
M06.061	Rheumatoid arthritis without rheumatoid factor, right knee
M12.569	Traumatic arthropathy, unspecified knee
M15.9	Polyosteoarthritis, unspecified
M17.0	Bilateral primary osteoarthritis of knee
M17.11	Unilateral primary osteoarthritis, right knee
M17.12	Unilateral primary osteoarthritis, left knee
M17.2	Bilateral post-traumatic osteoarthritis of knee
M17.4	Other bilateral secondary osteoarthritis of knee

Showing 1–10 of 21

HCPCS L0112: Cranial Cervical Orthosis, Congenital Torticollis Type

HCPCS-L0113-CRANIAL-CERVICAL-ORTHOSIS-TORTICOLLIS

HCPCS Level II L0113: Prefabricated Cranial Cervical Orthosis for Torticollis

HCPCS-L0130-CERVICAL-FLEXIBLE-THERMOPLASTIC-COLLAR-MOLDED-TO-PATIENT

HCPCS Level II L0130: Cervical Flexible Thermoplastic Collar, Molded to Patient

HCPCS-L0140-CERVICAL-SEMI-RIGID-ADJUSTABLE-PLASTIC-COLLAR

HCPCS Level II L0140: Cervical Semi-Rigid Adjustable Plastic Collar

HCPCS-L0150-CERVICAL-SEMI-RIGID-ADJUSTABLE-CHIN-CUP

HCPCS Level II L0150: Cervical Semi-Rigid Adjustable Chin Cup

HCPCS-L0160-CERVICAL-SEMI-RIGID-OCCIPITAL-MANDIBULAR-SUPPORT

HCPCS Level II L0160: Cervical Semi-Rigid Occipital/Mandibular Support

HCPCS-L0170-CERVICAL-COLLAR-MOLDED-TO-PATIENT-MODEL

HCPCS Level II L0170: Cervical Collar, Custom-Molded

HCPCS-L0172-CERVICAL-COLLAR-SEMI-RIGID-THERMOPLASTIC-FOAM

HCPCS L0172: Cervical Collar, Semi-Rigid Prefabricated

HCPCS-L0174-CERVICAL-COLLAR-SEMI-RIGID-THORACIC-EXTENSION

HCPCS L0174: Cervical Collar, Semi-Rigid Thermoplastic with Thoracic Extension

HCPCS-L0180-CERVICAL-MULTIPLE-POST-COLLAR-OCCIPITAL-MANDIBULAR-ADJUSTABLE

HCPCS Level II L0180: Cervical Orthosis with Occipital/Mandibular Supports

Showing 1–10 of 466

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.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Explore openpayer tools

View all tools

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic(s)/prosthetic(s) management and training, initial encounter; simple, each 15 minutes	Used for patient training and education after delivery of the offset knee joint.
`97763`	Orthotic and prosthetic supply management, continuing orthotic/prosthetic care; established patient, prosthetic training, each 15 minutes	Used for follow-up adjustment and continuing prosthetic care after fitting the offset knee joint.
`99070`	Supplies and materials (except spectacles), provided by the physician over and above those usually included with the office visit or other services	Billed when additional materials or small parts are furnished with the offset knee joint.
`L-code`	Data not available in the input.	Data not available in the input.

Related Modifiers

5 rows

Modifier	Description	When to Use
59	Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…	- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
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…
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…
2P	Modifier -2P is a Category II performance‑measure exclusion appended to a CPT Category II (quality) code when the provider did not perform the measured action because of patient‑related reasons (for…	- Use modifier 2P only with CPT Category II (performance‑measure) codes when a patient‑specific reason prevented performance of the measured action (for example, patient refusal, economic or social…
74	Modifier ‑74 indicates an outpatient hospital or ASC procedure that was discontinued after anesthesia was administered and after the procedure had begun. Use this modifier when anesthesia (local,…	- Use modifier -74 when a procedure in an outpatient hospital or ASC setting is terminated after anesthesia has been administered and after the procedure has commenced (for example, after incision,…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
332B00000X	Durable Medical Equipment & Medical Supplies	A supplier of medical equipment such as respirators, wheelchairs, home dialysis systems, or monitoring systems, that are prescribed by a physician for…
207Q00000X	Family Medicine Physician	Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadt…
171M00000X	Case Manager/Care Coordinator	A person who provides case management services and assists an individual in gaining access to needed medical, social, educational, and/or other servic…
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…
103T00000X	Psychologist	A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, a…
164X00000X	Licensed Vocational Nurse	An individual with post-high school vocational training and practical experience in the provision of nursing care at a level less than that required f…
202K00000X	Phlebology Physician	Phlebology is the medical discipline that involves the diagnosis and treatment of venous disorders, including spider veins, varicose veins, chronic ve…
261QS0132X	Ophthalmologic Surgery Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center

Related ICD-10-CM Codes

21 rows

ICD-10-CM Code	Description
G71.3	Mitochondrial myopathy, not elsewhere classified
M05.761	Rheumatoid arthritis with rheumatoid factor of right knee without organ or systems involvement
M06.061	Rheumatoid arthritis without rheumatoid factor, right knee
M12.569	Traumatic arthropathy, unspecified knee
M15.9	Polyosteoarthritis, unspecified
M17.0	Bilateral primary osteoarthritis of knee
M17.11	Unilateral primary osteoarthritis, right knee
M17.12	Unilateral primary osteoarthritis, left knee
M17.2	Bilateral post-traumatic osteoarthritis of knee
M17.4	Other bilateral secondary osteoarthritis of knee

Showing 1–10 of 21

HCPCS L0112: Cranial Cervical Orthosis, Congenital Torticollis Type

HCPCS-L0113-CRANIAL-CERVICAL-ORTHOSIS-TORTICOLLIS

HCPCS Level II L0113: Prefabricated Cranial Cervical Orthosis for Torticollis

HCPCS-L0130-CERVICAL-FLEXIBLE-THERMOPLASTIC-COLLAR-MOLDED-TO-PATIENT

HCPCS Level II L0130: Cervical Flexible Thermoplastic Collar, Molded to Patient

HCPCS-L0140-CERVICAL-SEMI-RIGID-ADJUSTABLE-PLASTIC-COLLAR

HCPCS Level II L0140: Cervical Semi-Rigid Adjustable Plastic Collar

HCPCS-L0150-CERVICAL-SEMI-RIGID-ADJUSTABLE-CHIN-CUP

HCPCS Level II L0150: Cervical Semi-Rigid Adjustable Chin Cup

HCPCS-L0160-CERVICAL-SEMI-RIGID-OCCIPITAL-MANDIBULAR-SUPPORT

HCPCS Level II L0160: Cervical Semi-Rigid Occipital/Mandibular Support

HCPCS-L0170-CERVICAL-COLLAR-MOLDED-TO-PATIENT-MODEL

HCPCS Level II L0170: Cervical Collar, Custom-Molded

HCPCS-L0172-CERVICAL-COLLAR-SEMI-RIGID-THERMOPLASTIC-FOAM

HCPCS L0172: Cervical Collar, Semi-Rigid Prefabricated

HCPCS-L0174-CERVICAL-COLLAR-SEMI-RIGID-THORACIC-EXTENSION

HCPCS L0174: Cervical Collar, Semi-Rigid Thermoplastic with Thoracic Extension

HCPCS-L0180-CERVICAL-MULTIPLE-POST-COLLAR-OCCIPITAL-MANDIBULAR-ADJUSTABLE

HCPCS Level II L0180: Cervical Orthosis with Occipital/Mandibular Supports

Showing 1–10 of 466

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 L2390: Addition to Lower Extremity, Offset Knee Joint

Sign up for hcpcs L2390 policy alerts

OpenPayer

HCPCS Level II L2390: Addition to Lower Extremity, Offset Knee Joint

Sign up for hcpcs L2390 policy alerts

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 L2390: Addition to Lower Extremity, Offset Knee Joint

Sign up for hcpcs L2390 policy alerts

HCPCS Level II L2390: Addition to Lower Extremity, Offset Knee Joint

Sign up for hcpcs L2390 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 L2390 represent?

Where is the L2390 service usually provided?

What documentation is recommended when billing L2390?

Which related CPT or supply codes may be billed alongside L2390?

Which payers are shown as covering L2390 and where can I find reimbursement details?

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 L2390 represent?

Where is the L2390 service usually provided?

What documentation is recommended when billing L2390?

Which related CPT or supply codes may be billed alongside L2390?

Which payers are shown as covering L2390 and where can I find reimbursement details?

References