HCPCS Level II L1970: Ankle-Foot Orthosis, Plastic with Ankle Joint, Custom Fabricated

HCPCS Level II code L1970 describes a custom-fabricated plastic ankle-foot orthosis with an ankle joint, a durable medical equipment service typically provided by orthotics/prosthetics suppliers and delivered in outpatient clinics or specialty prosthetic facilities for patients needing jointed AFO support.

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HCPCS Level II L1970: Ankle-Foot Orthosis, Plastic with Ankle Joint, Custom Fabricated

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Clinical & Coding Specifications

Clinical Context

A 54-year-old patient with chronic right ankle instability and drop foot following a motor vehicle collision presents to an orthotics clinic after failing conservative management (physical therapy and ankle bracing). The treating physician, an orthopedist, documents persistent pain, recurrent ankle sprains, and functional gait impairment. A prescription for a custom fabricated plastic ankle-foot orthosis with an integrated mechanical ankle joint (L1970) is written to provide medial-lateral support, controlled motion, and improved ambulation.

The clinical workflow begins with a specialist evaluation (history, focused lower-extremity exam, and gait assessment), radiographs to rule out acute fracture or progressive arthrosis, and anthropometric measurements of the lower limb. The orthotist performs a formal casting or 3D scan, documents the functional goals and fitting specifications, and fabricates the AFO. A follow-up visit includes fitting, alignment adjustments, education on donning/doffing, and documentation of functional outcomes (e.g., improved stability, reduced pain, increased walking tolerance). Billing for the device uses HCPCS code L1970 with appropriate modifier(s) to reflect laterality, supplier/provider circumstances, and payer-specific requirements.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99203`	Office visit, new patient, low to moderate complexity	Initial specialist evaluation and documentation supporting medical necessity for `L1970`
`99456`	Work-related and medical disability examination	Used when functional capacity or work-related impairment assessment informs AFO prescription
`97035`	Ultrasound therapy, each 15 minutes	Ancillary therapy sometimes provided during rehabilitation before or after AFO provision
`97110`	Therapeutic exercises to develop strength and endurance	Performed in therapy to improve gait and complement AFO use
`97530`	Therapeutic activities, direct (one-on-one)	Functional training with the AFO during rehabilitation

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…
50	Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…	- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…
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…
80	CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…	- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207K00000X	Allergy & Immunology Physician	An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
207L00000X	Anesthesiology Physician	An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
173000000X	Legal Medicine	The specialty areas of medicine concerned with matters of, and relations with, substantive law and legal institutions; such as the conduct of medical …
261QP2400X	Prison Health Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center
1223X2210X	Orofacial Pain Dentistry	A dentist who assesses, diagnoses, and treats patients with complex chronic orofacial pain and dysfunction disorders, oromotor and jaw behavior disord…
2251S0007X	Sports Physical Therapist	A licensed physical therapist, including but not limited to an individual who is a Board Certified Specialist in Sports Physical Therapy, who has demo…
163WL0100X	Lactation Consultant (Registered Nurse)	Nursing Service Providers · Registered Nurse
208D00000X	General Practice Physician	A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.

Related ICD-10-CM Codes

14 rows

ICD-10-CM Code	Description
G81.91	Hemiplegia, unspecified affecting right dominant side
G82.20	Paraplegia, unspecified
M20.41	Other hammer toe(s) (acquired), right foot
M20.42	Other hammer toe(s) (acquired), left foot
M21.371	Foot drop, right foot
M21.372	Foot drop, left foot
M21.379	Foot drop, unspecified foot
M24.171	Other articular cartilage disorders, right ankle
M24.172	Other articular cartilage disorders, left ankle
M24.173	Other articular cartilage disorders, unspecified ankle

Showing 1–10 of 14

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.

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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99203`	Office visit, new patient, low to moderate complexity	Initial specialist evaluation and documentation supporting medical necessity for `L1970`
`99456`	Work-related and medical disability examination	Used when functional capacity or work-related impairment assessment informs AFO prescription
`97035`	Ultrasound therapy, each 15 minutes	Ancillary therapy sometimes provided during rehabilitation before or after AFO provision
`97110`	Therapeutic exercises to develop strength and endurance	Performed in therapy to improve gait and complement AFO use
`97530`	Therapeutic activities, direct (one-on-one)	Functional training with the AFO during rehabilitation

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…
50	Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…	- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…
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…
80	CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…	- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207K00000X	Allergy & Immunology Physician	An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
207L00000X	Anesthesiology Physician	An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
173000000X	Legal Medicine	The specialty areas of medicine concerned with matters of, and relations with, substantive law and legal institutions; such as the conduct of medical …
261QP2400X	Prison Health Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center
1223X2210X	Orofacial Pain Dentistry	A dentist who assesses, diagnoses, and treats patients with complex chronic orofacial pain and dysfunction disorders, oromotor and jaw behavior disord…
2251S0007X	Sports Physical Therapist	A licensed physical therapist, including but not limited to an individual who is a Board Certified Specialist in Sports Physical Therapy, who has demo…
163WL0100X	Lactation Consultant (Registered Nurse)	Nursing Service Providers · Registered Nurse
208D00000X	General Practice Physician	A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.

Related ICD-10-CM Codes

14 rows

ICD-10-CM Code	Description
G81.91	Hemiplegia, unspecified affecting right dominant side
G82.20	Paraplegia, unspecified
M20.41	Other hammer toe(s) (acquired), right foot
M20.42	Other hammer toe(s) (acquired), left foot
M21.371	Foot drop, right foot
M21.372	Foot drop, left foot
M21.379	Foot drop, unspecified foot
M24.171	Other articular cartilage disorders, right ankle
M24.172	Other articular cartilage disorders, left ankle
M24.173	Other articular cartilage disorders, unspecified ankle

Showing 1–10 of 14

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 L1970: Ankle-Foot Orthosis, Plastic with Ankle Joint, Custom Fabricated

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HCPCS Level II L1970: Ankle-Foot Orthosis, Plastic with Ankle Joint, Custom Fabricated

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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 L1970: Ankle-Foot Orthosis, Plastic with Ankle Joint, Custom Fabricated

Sign up for hcpcs L1970 policy alerts

HCPCS Level II L1970: Ankle-Foot Orthosis, Plastic with Ankle Joint, Custom Fabricated

Sign up for hcpcs L1970 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 L1970 represent and what is included in the clinical workflow?

Which modifiers are commonly used with L1970 and when should they be applied?

Which diagnoses are referenced as clinical indications for prescribing L1970?

Where is the L1970 AFO typically provided or fabricated?

What related CPT codes should be considered alongside L1970 for evaluation and rehabilitation services?

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 L1970 represent and what is included in the clinical workflow?

Which modifiers are commonly used with L1970 and when should they be applied?

Which diagnoses are referenced as clinical indications for prescribing L1970?

Where is the L1970 AFO typically provided or fabricated?

What related CPT codes should be considered alongside L1970 for evaluation and rehabilitation services?

References