HCPCS L9900: Orthotic and Prosthetic Supply or Accessory

HCPCS Level II code L9900 designates an orthotic and prosthetic supply, accessory, or service component that is provided as part of another primary L-series orthotic/prosthetic device; the service type is orthotic/prosthetic supply or accessory and the typical site of service is outpatient clinics, prosthetic/orthotic facilities, or durable medical equipment suppliers where components are added to or support a primary prosthesis or orthosis.

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HCPCS L9900: Orthotic and Prosthetic Supply or Accessory

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Get alerted when payer policies referencing L9900 are released or updated.

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Clinical & Coding Specifications

Clinical Context

A 62-year-old patient with peripheral vascular disease and a history of a below-knee amputation presents to an orthotics and prosthetics clinic for device maintenance and accessory replacement. The patient uses a prosthetic limb that requires periodic replacement of an accessory component (for example, a liner, suspension sleeve, prosthetic foot pad, or replacement straps) that is billed separately from the main L orthotic/prosthetic device. The clinical workflow begins with an evaluation by a certified prosthetist to inspect the device, identify worn or broken accessories, document medical necessity, and obtain measurements or photos as needed. The prosthetist documents the accessory type, reason for replacement (wear, damage, infection control, or fit change), and the relationship to the primary L series device. If ordering supplies, the prosthetist coordinates with the supplier to procure the accessory, documents device serial numbers, and completes any required prior authorization or supporting documentation for payors. The accessory is dispensed or shipped to the patient; follow-up visits address fit, function, and any adjustments. Billing uses L9900 to report the orthotic/prosthetic supply, accessory, and/or service component when it is distinct from the primary L device code in the same episode of care.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic(s) fitting and training, upper extremity, lower extremity and/or trunk, initial encounter, each 15 minutes	Used for patient training and fitting sessions when a new accessory materially alters device use or fit
`97763`	Orthotic/prosthetic management and/or training, upper or lower extremity, subsequent encounter	Used for follow-up visits to adjust, troubleshoot, or train with the accessory in place
`97530`	Therapeutic activities, direct (one-on-one) skilled therapy	May be used when functional training related to accessory use requires skilled therapeutic intervention
`99070`	Supplies and materials (except spectacles), provided by the physician over and above those usually included with the office visit	Occasionally used if small non-DME supplies related to accessory fitting are provided in the office setting
`L-Code Related`	Data not available in the input.	The primary device/prosthesis `L` series code that corresponds to the accessory should be billed separately when applicable

Related Modifiers

5 rows

Modifier	Description	When to Use
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…
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…
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…
[object Object]

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
208M00000X	Hospitalist Physician	Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient ca…
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…
261QM1103X	Military Ambulatory Procedure Visits Operational (Transportable) Clinic/Center	"Non-fixed" facilities or distinct parts of a "non-fixed" facility, providing outpatient surgical procedures requiring medically supervised recovery. …
286500000X	Military Hospital	A health care facility operated by the Department of Defense.
2082S0099X	Plastic Surgery Within the Head and Neck (Plastic Surgery) Physician	A plastic surgeon with additional training in plastic and reconstructive procedures within the head, face, neck and associated structures, including c…
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…
2471B0102X	Bone Densitometry Radiologic Technologist	A radiologic technologist who specializes in bone densitometry and is appropriately educated and trained, consistent with nationally recognized standa…
224P00000X	Prosthetist	A health care professional who is specifically educated and trained to manage comprehensive prosthetic patient care for individuals who have sustained…

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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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.

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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97760`	Orthotic(s) fitting and training, upper extremity, lower extremity and/or trunk, initial encounter, each 15 minutes	Used for patient training and fitting sessions when a new accessory materially alters device use or fit
`97763`	Orthotic/prosthetic management and/or training, upper or lower extremity, subsequent encounter	Used for follow-up visits to adjust, troubleshoot, or train with the accessory in place
`97530`	Therapeutic activities, direct (one-on-one) skilled therapy	May be used when functional training related to accessory use requires skilled therapeutic intervention
`99070`	Supplies and materials (except spectacles), provided by the physician over and above those usually included with the office visit	Occasionally used if small non-DME supplies related to accessory fitting are provided in the office setting
`L-Code Related`	Data not available in the input.	The primary device/prosthesis `L` series code that corresponds to the accessory should be billed separately when applicable

Related Modifiers

5 rows

Modifier	Description	When to Use
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…
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…
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…
[object Object]

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
208M00000X	Hospitalist Physician	Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient ca…
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…
261QM1103X	Military Ambulatory Procedure Visits Operational (Transportable) Clinic/Center	"Non-fixed" facilities or distinct parts of a "non-fixed" facility, providing outpatient surgical procedures requiring medically supervised recovery. …
286500000X	Military Hospital	A health care facility operated by the Department of Defense.
2082S0099X	Plastic Surgery Within the Head and Neck (Plastic Surgery) Physician	A plastic surgeon with additional training in plastic and reconstructive procedures within the head, face, neck and associated structures, including c…
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…
2471B0102X	Bone Densitometry Radiologic Technologist	A radiologic technologist who specializes in bone densitometry and is appropriately educated and trained, consistent with nationally recognized standa…
224P00000X	Prosthetist	A health care professional who is specifically educated and trained to manage comprehensive prosthetic patient care for individuals who have sustained…

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 L9900: Orthotic and Prosthetic Supply or Accessory

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OpenPayer

HCPCS L9900: Orthotic and Prosthetic Supply or Accessory

Sign up for hcpcs L9900 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related Codes

References

HCPCS L9900: Orthotic and Prosthetic Supply or Accessory

Sign up for hcpcs L9900 policy alerts

HCPCS L9900: Orthotic and Prosthetic Supply or Accessory

Sign up for hcpcs L9900 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related Codes

What is the clinical context for using HCPCS code `L9900` for orthotic/prosthetic supplies or accessories?

Which CPT codes are related to the provision of orthotic/prosthetic accessories and how?

What ICD-10 codes are clinically relevant for orthotic/prosthetic accessory replacement?

What is the typical site of service for billing HCPCS code `L9900`?

Which payers cover HCPCS code `L9900` for orthotic/prosthetic supplies or accessories?

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related Codes

What is the clinical context for using HCPCS code `L9900` for orthotic/prosthetic supplies or accessories?

Which CPT codes are related to the provision of orthotic/prosthetic accessories and how?

What ICD-10 codes are clinically relevant for orthotic/prosthetic accessory replacement?

What is the typical site of service for billing HCPCS code `L9900`?

Which payers cover HCPCS code `L9900` for orthotic/prosthetic supplies or accessories?

References