HCPCS Level II A4479: Electronic Transanal Irrigation System

HCPCS Level II code A4479 identifies an electronic transanal irrigation system including an electronic pump, water reservoir, tubing, and accessories (without catheter) used to manage bowel dysfunction; the service is the provision of an electronic transanal irrigation device and supplies, typically supplied for use in the outpatient or home setting where patients receive bowel management therapy.

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HCPCS Level II A4479: Electronic Transanal Irrigation System

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Sign up for hcpcs A4479 policy alerts

Get alerted when payer policies referencing A4479 are released or updated.

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

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult with chronic neurogenic bowel or defecatory dysfunction (for example, spinal cord injury, multiple sclerosis, or refractory functional constipation) who requires regular antegrade or retrograde bowel irrigation to achieve predictable bowel evacuation. The electronic transanal irrigation system (A4479) is provided by a colorectal surgeon, gastroenterologist, wound/ostomy nurse, or pelvic floor physical therapist as part of a bowel management program. Clinical workflow: initial evaluation documents history of bowel dysfunction, prior conservative measures (dietary, laxatives, enemas), and assessment of manual dexterity and caregiver support. The clinician prescribes the electronic pump-based transanal irrigation system, arranges device training with nursing or therapy, completes home medical equipment documentation and justification, and sends the order to durable medical equipment. Training includes device setup, reservoir filling, tubing connection, irrigation technique, hygiene, and complication recognition (e.g., abdominal pain, bleeding). Follow-up visits assess efficacy, device tolerability, troubleshooting, and need for supplies. Typical site of service is outpatient clinic or home with training performed in clinic or home health setting.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Used for the initial office visit to evaluate bowel dysfunction and prescribe the irrigation system
`97530`	Therapeutic activities, direct (one-on-one) therapeutic services, functional performance activities	Used by pelvic floor therapists for training and functional rehabilitation related to bowel management
`94640`	Pressurized or non-pressurized inhalation treatment for acute airway obstruction (not directly related)	Data not available in the input.
`97161`	Physical therapy evaluation, low complexity	Used when a physical therapist or pelvic floor specialist evaluates the patient prior to device training
`99501`	Home visit for administration of administration of medical equipment education (example code for education)	Used for in-home training visits by clinicians or home health when teaching device use and safety

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…
P2	Modifier P2 denotes an ASA Physical Status II — a patient with mild systemic disease. Per AMA/AAPC, examples include well-controlled hypertension or diabetes, mild obesity (BMI 30–40), current smoker…	- When to use: Append modifier -P2 to anesthesia CPT codes (00100–01999) when the anesthesia provider documents the patient has mild systemic disease (ASA Physical Status II) — for example…
56	Modifier ‑56 indicates the reporting provider furnished only the preoperative management for a surgical procedure and did not perform the intraoperative or postoperative care. It is used in…	- Use Modifier -56 when a provider performs only the preoperative management in a split‑care situation (one physician manages preop care while a different physician performs the intraoperative…
1P	Modifier 1P is a Category II performance measure exclusion modifier used to indicate that a patient’s medical condition prevented performance of the action specified by a Category II quality measure…	- Use modifier 1P only with Category II (quality reporting) codes when the specific measure’s reporting instructions explicitly allow a medical-reason exclusion; it marks the patient as medically…
55	Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…	- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207RG0300X	Geriatric Medicine (Internal Medicine) Physician	An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects o…
163W00000X	Registered Nurse	(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive…
363L00000X	Nurse Practitioner	(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
103TM1800X	Intellectual & Developmental Disabilities Psychologist	Behavioral Health & Social Service Providers · Psychologist
102L00000X	Psychoanalyst	Psychoanalysis is a comprehensive, theoretical framework which, when applied to a treatment process, consists of an intensive verbal, therapeutic rela…
2251H1200X	Hand Physical Therapist	Respiratory, Developmental, Rehabilitative and Restorative Service Providers · Physical Therapist
207YS0012X	Sleep Medicine (Otolaryngology) Physician	An Otolaryngologist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physio…
152W00000X	Optometrist	Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injurie…

Related Codes

HCPCS-A4206-STERILE-SYRINGE-1CC-NEEDLE

HCPCS A4206: Syringe with Needle, 1 cc or Less, Sterile

HCPCS-A4207-STERILE-2CC-SYRINGE-WITH-NEEDLE

HCPCS Level II A4207: Syringe with Needle, Sterile 2 cc

HCPCS-A4208-STERILE-3CC-SYRINGE-WITH-NEEDLE

HCPCS Level II A4208: Syringe with Needle, Sterile 3 cc

HCPCS-A4209-STERILE-SYRINGE-WITH-NEEDLE-5CC-OR-GREATER

HCPCS Level II A4209: Syringe with Needle, Sterile 5 cc or Greater

HCPCS-A4210-NEEDLE-FREE-INJECTION-DEVICE

HCPCS Level II A4210: Needle-free Injection Device, Each

HCPCS-A4211-SUPPLIES-SELF-ADMINISTERED-INJECTIONS

HCPCS Level II A4211: Supplies for Self-Administered Injections

HCPCS-A4212-NON-CORING-NEEDLE-STYLET-CATHETER-ACCESS-SUPPLY

HCPCS Level II A4212: Non-coring Needle or Stylet with/without Catheter

HCPCS-A4213-STERILE-SYRINGE-20CC-OR-GREATER

HCPCS Level II A4213: Syringe, Sterile, 20 cc or Greater, Each

HCPCS-A4215-STERILE-NEEDLE-SINGLE-EACH

HCPCS Level II A4215: Needle, Sterile, Any Size

HCPCS-A4216-STERILE-DILUENT-FLUSH-10ML

HCPCS Level II A4216: Sterile Diluent/Flush, 10 ml

Showing 1–10 of 633

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
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Used for the initial office visit to evaluate bowel dysfunction and prescribe the irrigation system
`97530`	Therapeutic activities, direct (one-on-one) therapeutic services, functional performance activities	Used by pelvic floor therapists for training and functional rehabilitation related to bowel management
`94640`	Pressurized or non-pressurized inhalation treatment for acute airway obstruction (not directly related)	Data not available in the input.
`97161`	Physical therapy evaluation, low complexity	Used when a physical therapist or pelvic floor specialist evaluates the patient prior to device training
`99501`	Home visit for administration of administration of medical equipment education (example code for education)	Used for in-home training visits by clinicians or home health when teaching device use and safety

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…
P2	Modifier P2 denotes an ASA Physical Status II — a patient with mild systemic disease. Per AMA/AAPC, examples include well-controlled hypertension or diabetes, mild obesity (BMI 30–40), current smoker…	- When to use: Append modifier -P2 to anesthesia CPT codes (00100–01999) when the anesthesia provider documents the patient has mild systemic disease (ASA Physical Status II) — for example…
56	Modifier ‑56 indicates the reporting provider furnished only the preoperative management for a surgical procedure and did not perform the intraoperative or postoperative care. It is used in…	- Use Modifier -56 when a provider performs only the preoperative management in a split‑care situation (one physician manages preop care while a different physician performs the intraoperative…
1P	Modifier 1P is a Category II performance measure exclusion modifier used to indicate that a patient’s medical condition prevented performance of the action specified by a Category II quality measure…	- Use modifier 1P only with Category II (quality reporting) codes when the specific measure’s reporting instructions explicitly allow a medical-reason exclusion; it marks the patient as medically…
55	Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…	- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207RG0300X	Geriatric Medicine (Internal Medicine) Physician	An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects o…
163W00000X	Registered Nurse	(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive…
363L00000X	Nurse Practitioner	(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
103TM1800X	Intellectual & Developmental Disabilities Psychologist	Behavioral Health & Social Service Providers · Psychologist
102L00000X	Psychoanalyst	Psychoanalysis is a comprehensive, theoretical framework which, when applied to a treatment process, consists of an intensive verbal, therapeutic rela…
2251H1200X	Hand Physical Therapist	Respiratory, Developmental, Rehabilitative and Restorative Service Providers · Physical Therapist
207YS0012X	Sleep Medicine (Otolaryngology) Physician	An Otolaryngologist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physio…
152W00000X	Optometrist	Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injurie…

Related Codes

HCPCS-A4206-STERILE-SYRINGE-1CC-NEEDLE

HCPCS A4206: Syringe with Needle, 1 cc or Less, Sterile

HCPCS-A4207-STERILE-2CC-SYRINGE-WITH-NEEDLE

HCPCS Level II A4207: Syringe with Needle, Sterile 2 cc

HCPCS-A4208-STERILE-3CC-SYRINGE-WITH-NEEDLE

HCPCS Level II A4208: Syringe with Needle, Sterile 3 cc

HCPCS-A4209-STERILE-SYRINGE-WITH-NEEDLE-5CC-OR-GREATER

HCPCS Level II A4209: Syringe with Needle, Sterile 5 cc or Greater

HCPCS-A4210-NEEDLE-FREE-INJECTION-DEVICE

HCPCS Level II A4210: Needle-free Injection Device, Each

HCPCS-A4211-SUPPLIES-SELF-ADMINISTERED-INJECTIONS

HCPCS Level II A4211: Supplies for Self-Administered Injections

HCPCS-A4212-NON-CORING-NEEDLE-STYLET-CATHETER-ACCESS-SUPPLY

HCPCS Level II A4212: Non-coring Needle or Stylet with/without Catheter

HCPCS-A4213-STERILE-SYRINGE-20CC-OR-GREATER

HCPCS Level II A4213: Syringe, Sterile, 20 cc or Greater, Each

HCPCS-A4215-STERILE-NEEDLE-SINGLE-EACH

HCPCS Level II A4215: Needle, Sterile, Any Size

HCPCS-A4216-STERILE-DILUENT-FLUSH-10ML

HCPCS Level II A4216: Sterile Diluent/Flush, 10 ml

Showing 1–10 of 633

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.

HCPCS Level II A4479: Electronic Transanal Irrigation System

Sign up for hcpcs A4479 policy alerts

HCPCS Level II A4479: Electronic Transanal Irrigation System

Sign up for hcpcs A4479 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related Codes

What does HCPCS code A4479 represent?

Which patients and clinical scenarios are appropriate for A4479 based on the provided clinical context?

Who provides device training and what does training typically include?

What related CPT codes are commonly used alongside A4479 and for what purposes?

Which ICD-10 diagnoses are associated with clinical use of the electronic transanal irrigation system (A4479)?

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related Codes

What does HCPCS code A4479 represent?

Which patients and clinical scenarios are appropriate for A4479 based on the provided clinical context?

Who provides device training and what does training typically include?

What related CPT codes are commonly used alongside A4479 and for what purposes?

Which ICD-10 diagnoses are associated with clinical use of the electronic transanal irrigation system (A4479)?

References