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    OpenPayerBilling CodesEnteral and Parenteral TherapyHCPCS hcpcs-b4155-enteral-modular-nutrient-formula
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    HCPCS B4155: Modular Enteral Nutrients, 100 Calorie Unit

    HCPCS Level II code B4155 describes an enteral formula product that is nutritionally incomplete or modular, containing specific nutrients such as carbohydrates (e.g., glucose polymers), proteins/amino acids (e.g., glutamine, arginine), fats (e.g., medium chain triglycerides), or combinations, billed per 100 calories as one unit; the service is the provision of modular enteral nutrients administered through an enteral feeding tube and is typically provided in inpatient, hospital outpatient, long-term care, or home enteral nutrition settings where tube feeding is required.

    For related coverage guidance, see recent payer policy updates: Achalasia and Gastroesophageal Reflux Disease (GERD) - Minimally Invasive Procedures - Medical Policy, Percutaneous Electrical Nerve Field Stimulation for Functional Abdominal Pain Disorders, Percutaneous Electrical Nerve Field Stimulation for Disorders of Gut-Brain Interaction.

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    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.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    49440Insertion 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
    43246Esophagogastroduodenoscopy, flexible, transoral; with insertion of percutaneous gastrostomy tubeAlternative endoscopic approach associated with placement of the feeding access used for enteral formula administration
    44346Colonoscopy through stoma or tunneled catheter placement (as applicable)Occasionally relevant when alternate enteral access or revisions are required impacting supply needs
    99304Initial nursing facility care, typically 30 days and underRepresents facility evaluation during which enteral nutrition needs and supplies like B4155 may be assessed and ordered
    99406Smoking and tobacco use cessation counseling, intermediateAncillary counseling CPT sometimes billed during nutritional visits; not directly tied but commonly co-provided in comprehensive outpatient visits

    Related Modifiers

    8 rows

    ModifierDescriptionWhen to Use
    22Modifier –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…
    52Modifier ‑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…
    53Modifier 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…
    54Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
    55Modifier –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…
    62Modifier 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…
    78CPT 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…
    80CPT® 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
    207Q00000X
    363L00000X
    207P00000X
    208D00000X
    221700000X
    2088F0040X
    101YA0400X
    163WA2000X

    Related Payer Policy Updates

    Specialty: Gastroenterology1 / 2

    10 rows

    PolicyPayerEffective Date
    Achalasia and Gastroesophageal Reflux Disease (GERD) - Minimally Invasive Procedures - Medical PolicyHealth-New-England2027-02-01
    Percutaneous Electrical Nerve Field Stimulation for Functional Abdominal Pain Disordersbcbsvermont2026-12-01
    Percutaneous Electrical Nerve Field Stimulation for Disorders of Gut-Brain Interactionpremerabluecrossofwashington2026-11-06
    Percutaneous electrical nerve field stimulation for disorders of gut-brain interactionpremerabluecrossofwashington2026-11-06
    Percutaneous Electrical Nerve Field Stimulation for Disorders of Gut-Brain Interactionpremerabluecrossofwashington2026-11-06
    Esophagogastroduodenoscopy (EGD) Coverage Policyevicore2026-11-05
    Radiofrequency Therapy for Fecal IncontinenceCigna2026-10-15
    Magnetic Sphincter Augmentation for the Treatment of Gastroesophageal Reflux Disease (GERD)univerahealthcare2026-10-15
    High-Resolution Anoscopy (HRA)Premera Bluecross2026-10-01
    Gastroesophageal and Gastrointestinal (GI) Services and ProceduresColorado Rocky Mountain Health Plans2026-10-01

    Related Codes

    HCPCS-B4034-ENTERAL-FEEDING-SYRINGE-FED-DAILY-KIT

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

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

    HCPCS Level II 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 Level II B4081: Nasogastric Tubing With Stylet

    HCPCS-B4082-NASOGASTRIC-TUBING-WITHOUT-STYLET

    HCPCS Level II B4082: Nasogastric Tubing Without Stylet

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

    HCPCS Level II B4083: Levine Stomach Tube

    HCPCS-B4087-GASTROSTOMY-JEJUNOSTOMY-TUBE-STANDARD

    HCPCS Level II B4087: Gastrostomy/Jejunostomy Feeding Tube, Standard

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

    HCPCS Level II B4088: Low-Profile Gastrostomy/Jejunostomy Tube

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

    HCPCS Level II B4100: Food Thickener, Oral, Per Ounce

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

    HCPCS Level II B4102: Enteral Formula for Fluid and Electrolyte Replacement

    Showing 1–10 of 50

    Frequently Asked Questions

    References

    1. 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. 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. 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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