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HCPCS B4155: Enteral Modular/Nutritionally Incomplete Formula

HCPCS Level II code B4155 designates enteral formulas that are nutritionally incomplete or modular nutrient products supplied for administration through an enteral feeding tube, with billing measured in units where 100 calories equals 1 unit. These products are used to supplement or customize enteral nutrition when a complete formula is not appropriate, such as when specific macronutrients (carbohydrates, amino acids, medium chain triglycerides) are required for clinical management. Nationally, B4155 matters because modular enteral products play a growing role in tailored nutrition plans for complex patients across care settings, influencing utilization, coverage policies, and spend for post-acute and home-based nutrition therapy.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code’s clinical context, typical sites of service, and how the product is quantified for billing. The publication summarizes common payer policy themes and coverage considerations, presents benchmark metrics and utilization patterns where available, and outlines relevant coding and billing considerations for enteral modular products. Data not available in the input is noted where applicable.

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Billing Code Overview

HCPCS Level II code B4155 describes an enteral formula that is nutritionally incomplete or a modular nutrient product, formulated to provide specific macronutrients such as carbohydrates (for example, glucose polymers), proteins or amino acids (for example, glutamine, arginine), fats (for example, medium chain triglycerides), or combinations of these. The code is reported in units where 100 calories = 1 unit.

Service Type: Enteral nutrition product — modular or incomplete enteral formula intended for administration via an enteral feeding tube

Typical Site of Service: Home health, long-term care facility, hospital inpatient or outpatient setting where enteral tube feeding is provided

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HCPCS B4155: Enteral Modular/Nutritionally Incomplete Formula

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Billing Code Overview

Service Type: Enteral nutrition product — modular or incomplete enteral formula intended for administration via an enteral feeding tube

Typical Site of Service: Home health, long-term care facility, hospital inpatient or outpatient setting where enteral tube feeding is provided

Clinical & Coding Specifications

Clinical Context

A 68-year-old patient with advanced head and neck cancer who has dysphagia and an existing percutaneous endoscopic gastrostomy (PEG) tube requires modular enteral nutrition to meet specific macronutrient goals. The patient is receiving home enteral nutrition delivered via the PEG tube because oral intake is inadequate. A registered dietitian prescribes a nutritionally incomplete modular formula containing additional protein (e.g., glutamine, arginine) and medium chain triglyceride fat to augment a commercial formula. Enteral formula units are billed as B4155 with 100 calories counted as one billing unit. The clinical workflow includes the outpatient or home health clinician documenting the nutritional assessment, the physician or advanced practice provider ordering the modular enteral formula, the durable medical equipment supplier dispensing B4155 in measured calorie-based units, and the home health nurse or caregiver administering the formula via the feeding tube. Typical encounters include initial nutritional assessment, periodic reassessment, coordination with pharmacy or supplier for delivery, and documentation of tube feeding tolerance and caloric delivery in the medical record.

Coding Specifications

Modifier	Description	When to Use
`11`	Office or other outpatient service	When `B4155` is provided during an outpatient clinic visit and a separate clinic visit is reported
`22`	Increased procedural services	When extra work is required for complex ordering, compounding, or extensive documentation beyond typical scope
`52`	Reduced services	If less than the usual supply or partial delivery of the prescribed modular formula occurs
`53`	Discontinued service	When the supply is canceled or discontinued before delivery or administration
`54`	Surgical care only	If billing is part of a surgical global period and supplier services are limited to intraoperative supply only
`55`	Postoperative management only	When the supplier provides formula exclusively during the postoperative period under global billing rules
`62`	Two surgeons	Rarely used; if two providers from different specialties share responsibility for complex enteral access and supply coordination
`78`	Return to operating room	If reoperation leads to additional enteral supply requirements tied to the surgical episode
`80`	Assistant surgeon	When an assistant surgeon is involved in surgical placement of access that directly affects supply provision
`KX`	Requirements specified in the medical policy are met	When documentation supports medical necessity according to payor policy for `B4155`
`NU`	New equipment	If the modular formula is billed in association with initial setup of enteral feeding supplies as a new service
`QX`	Requirements met for two-person billing (modifier QX often used with certified medical assistance)	When program rules require a specific modifier attestation for supplier services involving two-person care models
`RR`	Rental	When components associated with enteral feeding are rented and modifiers need to indicate rental status alongside supply billing
`UE`	Health professional short supply	When unusual supply chain issues require documentation and a modifier indicating special handling or shortage

Taxonomy Code	Specialty	Notes
`335000000X`	Dietitian/Nutritionist	Registered dietitians prescribe and monitor enteral nutrition regimens and document nutritional plans
`207Q00000X`	Gastroenterology	Gastroenterologists place and manage enteral access (PEG tubes) and oversee tube feeding complications
`363L00000X`	Home Health Care Provider	Home health nurses provide administration support, monitoring, and training for home enteral nutrition
`207P00000X`	Surgery	General or otolaryngologic surgeons perform PEG or other feeding tube placements relevant to enteral supply use
`208D00000X`	Internal Medicine	Hospitalists or primary care providers manage the overall care plan and order enteral nutrition supplies

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E43`	Unspecified severe protein-calorie malnutrition	Indicates severe malnutrition requiring enteral modular supplementation such as `B4155` to meet protein and calorie needs
`E46`	Unspecified protein-calorie malnutrition	Reflects malnutrition where modular enteral formulas are used to augment caloric and macronutrient intake
`R13.10`	Dysphagia, unspecified	Dysphagia necessitates enteral tube feeding, making `B4155` appropriate for tube administration
`C32.9`	Malignant neoplasm of larynx, unspecified	Head and neck cancers commonly cause dysphagia and require enteral nutrition support with modular formulas
`K91.2`	Postsurgical malabsorption	Impaired absorption postoperatively may require specialized modular enteral nutrients to optimize caloric delivery
`G91.9`	Hydrocephalus, unspecified (example of chronic neurologic condition)	Neurologic disorders causing dysphagia and impaired oral intake often require tube feeds using modular formulas

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`49440`	Insertion of gastrostomy tube, percutaneous, under endoscopic guidance (PEG)	Commonly performed before long-term use of enteral formulas such as `B4155`; establishes permanent access for tube feeding
`43246`	Esophagogastroduodenoscopy, flexible, transoral; with insertion of percutaneous gastrostomy tube	Alternative endoscopic approach associated with placement of the feeding access used for enteral formula administration
`44346`	Colonoscopy through stoma or tunneled catheter placement (as applicable)	Occasionally relevant when alternate enteral access or revisions are required impacting supply needs
`99304`	Initial nursing facility care, typically 30 days and under	Represents facility evaluation during which enteral nutrition needs and supplies like `B4155` may be assessed and ordered
`99406`	Smoking and tobacco use cessation counseling, intermediate	Ancillary counseling CPT sometimes billed during nutritional visits; not directly tied but commonly co-provided in comprehensive outpatient visits

HCPCS B4034: Enteral Feeding Supply Kit, Syringe-Fed, Per Day

HCPCS-B4035-ENTERAL-FEEDING-SUPPLY-KIT-PUMP-FED-PER-DAY

HCPCS B4035: Enteral Feeding Supply Kit, Pump-Fed, Per Day

HCPCS-B4036-ENTERAL-FEEDING-SUPPLY-KIT-GRAVITY-FED-DAILY

HCPCS Level II B4036: Enteral Feeding Supply Kit, Gravity-Fed, Per Day

HCPCS-B4081-NASOGASTRIC-TUBING-WITH-STYLET

HCPCS B4081: Nasogastric Tubing with Stylet

HCPCS-B4082-NASOGASTRIC-TUBING-WITHOUT-STYLET

HCPCS B4082: Nasogastric Tubing Without Stylet

HCPCS-B4083-LEVINE-STOMACH-TUBE-NASOGASTRIC-SUPPLY

HCPCS B4083: Levine-Type Stomach (Nasogastric) Tube

HCPCS-B4087-GASTROSTOMY-JEJUNOSTOMY-TUBE-STANDARD

HCPCS B4087: Gastrostomy/Jejunostomy Tube, Standard, Single

HCPCS-B4088-LOW-PROFILE-GASTROSTOMY-JEJUNOSTOMY-TUBE

HCPCS B4088: Low-Profile Gastrostomy/Jejunostomy Tube, Each

HCPCS-B4100-FOOD-THICKENER-ORAL-PER-OUNCE

HCPCS B4100: Food Thickener, Oral, per Ounce

HCPCS-B4102-ENTERAL-FLUID-ELECTROLYTE-REPLACEMENT-FORMULA-ADULT

HCPCS B4102: Adult Enteral Fluid and Electrolyte Replacement Formula, 500 ml unit

Showing 1–10 of 50

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

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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.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`11`	Office or other outpatient service	When `B4155` is provided during an outpatient clinic visit and a separate clinic visit is reported
`22`	Increased procedural services	When extra work is required for complex ordering, compounding, or extensive documentation beyond typical scope
`52`	Reduced services	If less than the usual supply or partial delivery of the prescribed modular formula occurs
`53`	Discontinued service	When the supply is canceled or discontinued before delivery or administration
`54`	Surgical care only	If billing is part of a surgical global period and supplier services are limited to intraoperative supply only
`55`	Postoperative management only	When the supplier provides formula exclusively during the postoperative period under global billing rules
`62`	Two surgeons	Rarely used; if two providers from different specialties share responsibility for complex enteral access and supply coordination
`78`	Return to operating room	If reoperation leads to additional enteral supply requirements tied to the surgical episode
`80`	Assistant surgeon	When an assistant surgeon is involved in surgical placement of access that directly affects supply provision
`KX`	Requirements specified in the medical policy are met	When documentation supports medical necessity according to payor policy for `B4155`
`NU`	New equipment	If the modular formula is billed in association with initial setup of enteral feeding supplies as a new service
`QX`	Requirements met for two-person billing (modifier QX often used with certified medical assistance)	When program rules require a specific modifier attestation for supplier services involving two-person care models
`RR`	Rental	When components associated with enteral feeding are rented and modifiers need to indicate rental status alongside supply billing
`UE`	Health professional short supply	When unusual supply chain issues require documentation and a modifier indicating special handling or shortage

Taxonomy Code	Specialty	Notes
`335000000X`	Dietitian/Nutritionist	Registered dietitians prescribe and monitor enteral nutrition regimens and document nutritional plans
`207Q00000X`	Gastroenterology	Gastroenterologists place and manage enteral access (PEG tubes) and oversee tube feeding complications
`363L00000X`	Home Health Care Provider	Home health nurses provide administration support, monitoring, and training for home enteral nutrition
`207P00000X`	Surgery	General or otolaryngologic surgeons perform PEG or other feeding tube placements relevant to enteral supply use
`208D00000X`	Internal Medicine	Hospitalists or primary care providers manage the overall care plan and order enteral nutrition supplies

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E43`	Unspecified severe protein-calorie malnutrition	Indicates severe malnutrition requiring enteral modular supplementation such as `B4155` to meet protein and calorie needs
`E46`	Unspecified protein-calorie malnutrition	Reflects malnutrition where modular enteral formulas are used to augment caloric and macronutrient intake
`R13.10`	Dysphagia, unspecified	Dysphagia necessitates enteral tube feeding, making `B4155` appropriate for tube administration
`C32.9`	Malignant neoplasm of larynx, unspecified	Head and neck cancers commonly cause dysphagia and require enteral nutrition support with modular formulas
`K91.2`	Postsurgical malabsorption	Impaired absorption postoperatively may require specialized modular enteral nutrients to optimize caloric delivery
`G91.9`	Hydrocephalus, unspecified (example of chronic neurologic condition)	Neurologic disorders causing dysphagia and impaired oral intake often require tube feeds using modular formulas

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`49440`	Insertion of gastrostomy tube, percutaneous, under endoscopic guidance (PEG)	Commonly performed before long-term use of enteral formulas such as `B4155`; establishes permanent access for tube feeding
`43246`	Esophagogastroduodenoscopy, flexible, transoral; with insertion of percutaneous gastrostomy tube	Alternative endoscopic approach associated with placement of the feeding access used for enteral formula administration
`44346`	Colonoscopy through stoma or tunneled catheter placement (as applicable)	Occasionally relevant when alternate enteral access or revisions are required impacting supply needs
`99304`	Initial nursing facility care, typically 30 days and under	Represents facility evaluation during which enteral nutrition needs and supplies like `B4155` may be assessed and ordered
`99406`	Smoking and tobacco use cessation counseling, intermediate	Ancillary counseling CPT sometimes billed during nutritional visits; not directly tied but commonly co-provided in comprehensive outpatient visits

HCPCS B4034: Enteral Feeding Supply Kit, Syringe-Fed, Per Day

HCPCS-B4035-ENTERAL-FEEDING-SUPPLY-KIT-PUMP-FED-PER-DAY

HCPCS B4035: Enteral Feeding Supply Kit, Pump-Fed, Per Day

HCPCS-B4036-ENTERAL-FEEDING-SUPPLY-KIT-GRAVITY-FED-DAILY

HCPCS Level II B4036: Enteral Feeding Supply Kit, Gravity-Fed, Per Day

HCPCS-B4081-NASOGASTRIC-TUBING-WITH-STYLET

HCPCS B4081: Nasogastric Tubing with Stylet

HCPCS-B4082-NASOGASTRIC-TUBING-WITHOUT-STYLET

HCPCS B4082: Nasogastric Tubing Without Stylet

HCPCS-B4083-LEVINE-STOMACH-TUBE-NASOGASTRIC-SUPPLY

HCPCS B4083: Levine-Type Stomach (Nasogastric) Tube

HCPCS-B4087-GASTROSTOMY-JEJUNOSTOMY-TUBE-STANDARD

HCPCS B4087: Gastrostomy/Jejunostomy Tube, Standard, Single

HCPCS-B4088-LOW-PROFILE-GASTROSTOMY-JEJUNOSTOMY-TUBE

HCPCS B4088: Low-Profile Gastrostomy/Jejunostomy Tube, Each

HCPCS-B4100-FOOD-THICKENER-ORAL-PER-OUNCE

HCPCS B4100: Food Thickener, Oral, per Ounce

HCPCS-B4102-ENTERAL-FLUID-ELECTROLYTE-REPLACEMENT-FORMULA-ADULT

HCPCS B4102: Adult Enteral Fluid and Electrolyte Replacement Formula, 500 ml unit

Showing 1–10 of 50

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

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 B4155: Enteral Modular/Nutritionally Incomplete Formula

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Billing Code Overview

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HCPCS B4155: Enteral Modular/Nutritionally Incomplete Formula

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References