HCPCS L1900: Ankle-Foot Orthosis, Spring Wire Dorsiflexion Assist

HCPCS Level II code L1900 describes a custom-fabricated ankle-foot orthosis (AFO) with a spring wire dorsiflexion assist calf band used to support and assist dorsiflexion of the ankle; service type: custom orthotic fabrication and fitting; typical site of service: outpatient orthotics/prosthetics clinics or durable medical equipment suppliers where custom AFOs are measured, fabricated, and dispensed.

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HCPCS L1900: Ankle-Foot Orthosis, Spring Wire Dorsiflexion Assist

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Clinical & Coding Specifications

Clinical Context

A 62-year-old patient with chronic left foot drop following a stroke presents to a prosthetics and orthotics clinic for management of persistent dorsiflexion weakness, frequent tripping, and gait instability. The clinic team includes a physiatrist or orthopedic surgeon for clinical evaluation, a certified prosthetist/orthotist (CPO) for device measurement and fabrication, and rehabilitation therapists for gait training. After a physical exam confirming weak tibialis anterior function and assessing skin integrity and limb shape, the practitioner orders a custom-fabricated ankle foot orthosis described as L1900 — a spring wire, dorsiflexion-assist calf band AFO tailored to the patient’s anatomy.

The workflow includes: initial evaluation and diagnostic coding by the physician (visit and neurologic or musculoskeletal diagnosis), measurement and casting by the orthotist, custom fabrication in an orthotics lab, patient fitting and alignment adjustments, patient education on wear schedule and skin care, and follow-up visits to document functional improvement and any device modifications. Charges for the orthosis are submitted under L1900 with appropriate modifiers to reflect laterality, service details, or provider circumstances, and the functional gains are tracked in therapy notes and follow-up physician documentation.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic(s) management and training, initial encounter, 15 minutes	Used by therapists to train the patient in using the custom AFO after delivery
`97763`	Orthotic(s) management and training, subsequent encounter, 15 minutes	Used for follow-up training sessions after initial fitting
`99203`	Office visit for new patient, low to moderate complexity	Example evaluation code for a new patient visit when ordering the custom AFO
`99213`	Office visit for established patient, low to moderate complexity	Common follow-up visit code for post-delivery assessment and adjustments
`99070`	Supplies and materials (eg, gloves, casting materials)	Used to bill non-covered supplies directly related to fabrication when allowed

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…
62	Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…	- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
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…
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…
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Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
363L00000X	Nurse Practitioner	(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
207ND0900X	Dermatopathology Physician	A dermatopathologist has the expertise to diagnose and monitor diseases of the skin including infectious, immunologic, degenerative and neoplastic dis…
133VN1006X	Metabolic Nutrition Registered Dietitian	A registered dietitian who achieves specialized competency in metabolic nutrition.
2865C1500X	Deactivated - Military Hospital
2086S0102X	Surgical Critical Care Physician	A surgeon with expertise in the management of the critically ill and postoperative patient, particularly the trauma victim, who specializes in critica…
133VN1501X	Sports Dietetics Nutrition Registered Dietitian	An individual who is a Board Certified Specialist in Sports Dietetics and applies evidence-based nutrition knowledge in exercise and sports. RDNs spec…
2084A0401X	Addiction Medicine (Psychiatry & Neurology) Physician	A doctor of osteopathy board eligible/certified in the field of Psychiatry by the American Osteopathic Board of Neurology and Psychiatry is able to ob…
171100000X	Acupuncturist	An acupuncturist is a person who performs ancient therapy for alleviation of pain, anesthesia and treatment of some diseases. Acupuncturists use long,…

Related ICD-10-CM Codes

28 rows

ICD-10-CM Code	Description
E11.620	Type 2 diabetes mellitus with diabetic dermatitis
E11.621	Type 2 diabetes mellitus with foot ulcer
G57.51	Tarsal tunnel syndrome, right lower limb
G57.52	Tarsal tunnel syndrome, left lower limb
G81.90	Hemiplegia, unspecified affecting unspecified side
G81.91	Hemiplegia, unspecified affecting right dominant side
G82.50	Quadriplegia, unspecified
G82.51	Quadriplegia, C1-C4 complete
M05.871	Other rheumatoid arthritis with rheumatoid factor of right ankle and foot
M20.11	Hallux valgus (acquired), right foot

Showing 1–10 of 28

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
`97760`	Orthotic(s) management and training, initial encounter, 15 minutes	Used by therapists to train the patient in using the custom AFO after delivery
`97763`	Orthotic(s) management and training, subsequent encounter, 15 minutes	Used for follow-up training sessions after initial fitting
`99203`	Office visit for new patient, low to moderate complexity	Example evaluation code for a new patient visit when ordering the custom AFO
`99213`	Office visit for established patient, low to moderate complexity	Common follow-up visit code for post-delivery assessment and adjustments
`99070`	Supplies and materials (eg, gloves, casting materials)	Used to bill non-covered supplies directly related to fabrication when allowed

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…
62	Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…	- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
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…
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…
[object Object]

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
363L00000X	Nurse Practitioner	(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
207ND0900X	Dermatopathology Physician	A dermatopathologist has the expertise to diagnose and monitor diseases of the skin including infectious, immunologic, degenerative and neoplastic dis…
133VN1006X	Metabolic Nutrition Registered Dietitian	A registered dietitian who achieves specialized competency in metabolic nutrition.
2865C1500X	Deactivated - Military Hospital
2086S0102X	Surgical Critical Care Physician	A surgeon with expertise in the management of the critically ill and postoperative patient, particularly the trauma victim, who specializes in critica…
133VN1501X	Sports Dietetics Nutrition Registered Dietitian	An individual who is a Board Certified Specialist in Sports Dietetics and applies evidence-based nutrition knowledge in exercise and sports. RDNs spec…
2084A0401X	Addiction Medicine (Psychiatry & Neurology) Physician	A doctor of osteopathy board eligible/certified in the field of Psychiatry by the American Osteopathic Board of Neurology and Psychiatry is able to ob…
171100000X	Acupuncturist	An acupuncturist is a person who performs ancient therapy for alleviation of pain, anesthesia and treatment of some diseases. Acupuncturists use long,…

Related ICD-10-CM Codes

28 rows

ICD-10-CM Code	Description
E11.620	Type 2 diabetes mellitus with diabetic dermatitis
E11.621	Type 2 diabetes mellitus with foot ulcer
G57.51	Tarsal tunnel syndrome, right lower limb
G57.52	Tarsal tunnel syndrome, left lower limb
G81.90	Hemiplegia, unspecified affecting unspecified side
G81.91	Hemiplegia, unspecified affecting right dominant side
G82.50	Quadriplegia, unspecified
G82.51	Quadriplegia, C1-C4 complete
M05.871	Other rheumatoid arthritis with rheumatoid factor of right ankle and foot
M20.11	Hallux valgus (acquired), right foot

Showing 1–10 of 28

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 L1900: Ankle-Foot Orthosis, Spring Wire Dorsiflexion Assist

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HCPCS L1900: Ankle-Foot Orthosis, Spring Wire Dorsiflexion Assist

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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 L1900: Ankle-Foot Orthosis, Spring Wire Dorsiflexion Assist

Sign up for hcpcs L1900 policy alerts

HCPCS L1900: Ankle-Foot Orthosis, Spring Wire Dorsiflexion Assist

Sign up for hcpcs L1900 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What device and service does HCPCS L1900 represent and where is it typically provided?

Which modifiers are relevant when billing L1900?

What clinical scenarios and diagnoses support use of a custom dorsiflexion-assist AFO billed as L1900?

Which CPT codes are commonly billed alongside L1900 for training, evaluation, and supplies?

Which payers are noted for coverage considerations and does the page provide reimbursement rates?

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What device and service does HCPCS L1900 represent and where is it typically provided?

Which modifiers are relevant when billing L1900?

What clinical scenarios and diagnoses support use of a custom dorsiflexion-assist AFO billed as L1900?

Which CPT codes are commonly billed alongside L1900 for training, evaluation, and supplies?

Which payers are noted for coverage considerations and does the page provide reimbursement rates?

References