CurrentKaiser PermanentePolicy N/A

Clinical Review Criteria — Enteral Formula (Elemental and Non-elemental) Coverage

Clinical review criteria for medical necessity and coverage of enteral nutritional formulas (elemental, non-elemental, and formulas for inborn errors of metabolism) for Kaiser Foundation Health Plan of Washington members; affects providers requesting home enteral formula and billing staff.

Policy Summary

PayerKaiser Permanente

PolicyEnteral Formula (Elemental and Non-elemental) Coverage

Policy CodePolicy N/A

Change TypeNo material changes

Effective DateN/A

Next Review DateN/A

Key ActionVerify authorization requirements for enteral formula HCPCS codes using the Pre-authorization Code Check and submit last 6 months of clinical notes to support medical necessity.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

4distinct clinical indication groups

3 monthslong-term tube feeding threshold

multipleHCPCS billing codes specified

Coverage Criteria for Enteral Formulas

Coverage criteria (I–IV)

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.

Overall: Member meets ONE of groups I, II, III, or IV

Top-level grouping

I. Nutritional Replacement Therapy (elemental): Member must meet ONE diagnosis from list A AND meet ALL items in B

Elemental replacement

I.A Diagnoses: Crohn's Disease OR Inflammatory Bowel Disease OR Short Bowel Syndrome OR Eosinophilic gastrointestinal associated disorders

See chunk 2

I.B Replacement additional requirements: Formula intended for home use; member managed by a Gastroenterologist; evaluated and will be followed by a Registered Dietitian; elemental total nutritional replacement represents 80-100% of diet or >=80% of daily dietary requirements; alternative approaches have failed to result in adequate nutrition and control of symptoms; member meets feeding ability criteria

Feeding ability includes tolerance of oral supplementation or demonstration by member/caregiver to place/manage nasogastric or surgically placed feeding tube and regulate flow via gravity drip or pump (see chunk 2)

II. Nutritional Supplementation Therapy (elemental): Member must have ONE diagnosis from list A AND meet ALL items in B AND meet ONE of C

Supplemental elemental therapy requirements

II.A Diagnoses: Crohn's Disease OR Inflammatory Bowel Disease OR Short Bowel Syndrome OR Cystic Fibrosis involving the intestine OR Eosinophilic gastrointestinal associated disorders

See chunk 3

II.B Supplementation additional requirements: Intended for home use; documented growth failure/retardation or cachexia; member managed by a Gastroenterologist; evaluated and will be followed by a Registered Dietitian; other therapies (e.g., medication) have not resulted in adequate nutrition/weight gain

See chunk 3

II.C Feeding ability: Able to tolerate oral supplementation OR if unable to tolerate oral supplementation, member/caregiver demonstrates ability to place/manage nasogastric tube or surgically placed feeding tube AND demonstrate ability to regulate flow via gravity drip or pump

See chunk 3

III. Oral non-elemental formula for inborn errors of metabolism: Member must have ONE listed inherited metabolic disorder AND formula intended for home use (not for hospital or nursing facility)

Covered diagnoses include PKU, MSUD, Homocystinuria, Histidinemia, Tyrosinemia, Glycogen Storage Type II (Pompe) (see chunk 3)

IV. Non-elemental formula for tube feeding: Member requires tube feeding due to non-function or disease of the structures that normally permit food to reach the small bowel (anatomic or motility disorder) AND requires tube feeding to maintain weight and strength commensurate with overall health status AND condition anticipated to be long term (typically >=3 months/90 days)

Elemental formula may be delivered by tube only if indications in I or II are met (see chunk 4)

HCPCS and Coding Guidance

Elemental formulaHCPCSCovered

B4153	Enteral formula, nutritionally complete, hydrolyzed proteins (amino acids and peptide chain), includes fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit
B4161	Enteral formula, for pediatrics, hydrolyzed/amino acids and peptide chain proteins, includes fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit

Formulas for inborn errors of metabolismHCPCSCovered

B4157	Enteral formula, nutritionally complete, for special metabolic needs for inherited disease of metabolism, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit
B4162	Enteral formula, for pediatrics, special metabolic needs for inherited disease of metabolism, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit

Non-elemental formulaHCPCSCovered

B4150	Enteral formula, nutritionally complete with intact nutrients, includes proteins, fats, carbohydrates and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit
B4152	Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit
B4158	Enteral formula, for pediatrics, nutritionally complete with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber and/or iron, administered through an enteral feeding tube, 100 calories = 1 unit
B4159	Enteral formula, for pediatrics, nutritionally complete soy based with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber and/or iron, administered through an enteral feeding tube, 100 calories = 1 unit
B4160	Enteral formula, for pediatrics, nutritionally complete calorically dense (equal to or greater than 0.7 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit

Other / Not routinely covered by Medicare or specializedHCPCS

B4102	Enteral formula, for adults, used to replace fluids and electrolytes (e.g., clear liquids), 500 ml = 1 unit
B4103	Enteral formula, for pediatrics, used to replace fluids and electrolytes (e.g., clear liquids), 500 ml = 1 unit
B4105	In-line cartridge containing digestive enzyme(s) for enteral feeding, each
B4149	Enteral formula, manufactured blenderized natural foods with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit
B4154	Enteral formula, nutritionally complete, for special metabolic needs, excludes inherited disease of metabolism, includes altered composition of proteins, fats, carbohydrates, vitamins and/or minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit
B4155	Enteral formula, nutritionally incomplete/modular nutrients, includes specific nutrients, carbohydrates (e.g., glucose polymers), proteins/amino acids (e.g., glutamine, arginine), fat (e.g., medium chain triglycerides) or combination, administered through an enteral feeding tube, 100 calories = 1 unit

Caloric proportion thresholds — Nutritional Replacement and Supplementation Therapy

Nutritional Replacement Therapy (elemental)Elemental total nutritional replacement represents 80–100% of diet or ≥80% of daily dietary requirements; policy notes >90% (preferably 100%) in definitions

Nutritional Supplementation Therapy (elemental)Elemental supplementation requires >50% of caloric intake provided by the elemental formula

Clinical management requirementsFormula intended for home use; member managed by a Gastroenterologist and evaluated/followed by a Registered Dietitian

Prior therapy and alternativesAlternative approaches or other therapies (e.g., medications) must have failed to result in adequate nutrition/weight gain or symptom control

Feeding ability criteriaAble to tolerate oral supplementation OR member/caregiver can place/manage NG or surgically placed feeding tube and regulate flow via gravity drip or pump

Provider Actions, Authorization & Documentation

Prior Authorization

Authorization requirement for HCPCS codes

Enteral formula HCPCS codes listed in this policy are considered medically necessary only when the clinical criteria are met and any applicable prior authorization requirements are satisfied. Verify authorization requirements for specific HCPCS codes and plan type using the Pre-authorization Code Check.

To verify authorization requirements for a specific code by plan type, use the Pre-authorization Code Check.

Note

Concurrent therapy expectation

Elemental enteral nutrition is intended to be used in conjunction with other drug therapies (for example, 5-ASA compounds, corticosteroids, immunosuppressives, and antibiotics) and not as a substitute for these treatments. Consideration of surgery as primary therapy should be made for patients with significant strictures complicating nutrition.

Elemental nutrition may be used for nutritional replacement (>90% of caloric intake) or supplementation (>50% of caloric intake).

Documentation Required

Required documentation

Submit documentation to support medical necessity with the request. Required documents include:

Last 6 months of clinical notes from the requesting provider and/or specialist (e.g., PCP, GI specialist).
Last 6 months of radiology notes, if applicable.

Denial Risk

Experimental exclusion — intra‑peritoneal nutrition

Intra-peritoneal nutrition is considered experimental and investigational and is not covered.

Definitions

Elemental formula — definition and notes

DefinitionFormulas composed of amino acids, fats, sugars, vitamins, and minerals that lack whole or partial protein

Example productVivonex

Typical composition noteContains oligo-peptides as the major protein source (elementary diets like Vivonex, Vital HN) and may vary in fat content

Clinical roleUsed as elemental enteral nutrition with therapeutic role in Crohn's disease of the small intestine

Coverage contextCovered when member meets elemental formula criteria for replacement or supplementation under this policy

Non-elemental formula — definition and examples

DefinitionFormulas containing intact proteins and complex carbohydrates used for general tube feeding or specific conditions

Example productsEnsure, ProSobee

HCPCS groupNon-elemental formula codes include B4150, B4152, B4158, B4159, B4160 (100 calories = 1 unit)

Typical useUsed for tube feeding when structural or motility issues prevent oral intake and for long-term tube feeding (typically ≥3 months)

Product characteristicsMay be calorically dense (e.g., ≥1.5 kcal/ml for some products) and may include fiber and/or iron in pediatric formulations

OpenPayer

Clinical Review Criteria — Enteral Formula (Elemental and Non-elemental) Coverage

Coverage Criteria for Enteral Formulas

HCPCS and Coding Guidance

Provider Actions, Authorization & Documentation

Background

Definitions