ModifiedCentenePolicy CP.MP.163

Total Parenteral Nutrition and Intradialytic Parenteral Nutrition

Defines medical necessity criteria, initial and continued approval durations, indications and non‑proven indications for TPN and IDPN for Centene-affiliated health plans, affecting providers who request authorization for parenteral nutrition services.

Policy Summary

PayerCentene

PolicyTotal Parenteral Nutrition and Intradialytic Parenteral Nutrition

Policy CodePolicy CP.MP.163

Change TypeCriteria revisions and terminology clarifications

Effective Date

Next Review Date

Key ActionObtain prior authorization and document nutritional insufficiency and conditions making enteral feeding inappropriate per policy criteria.

SourceLink

POLICY UPDATE CHANGES

Updated criteria I.A.1.a. regarding low body weight to include details by age group and expanded to I.A.1.a. through c.; removed previous laboratory-based criteria; updated list of conditions that make enteral feeding inappropriate, adding radiation enteritis, liver failure in children and adults, acute necrotizing pancreatitis, and small bowel ischemia.

Changed terminology in IDPN criteria from 'end-stage renal disease' to 'stage 5 chronic kidney disease.'

Initial approval duration for TPN and IDPN is three months; continued approval duration is six months with documented positive response and no unacceptable complications.

3 monthsInitial approval duration for TPN/IDPN

6 monthsContinued approval duration for TPN/IDPN

≥10% / 6 moAdult weight-loss threshold

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.

Coverage Criteria for TPN and IDPN

Initial TPN Coverage

Covered when ALL of the following are met

TPN eligibility: 1) Documentation of nutritional insufficiency in the absence of TPN as shown by age-specific thresholds: adults — involuntary weight loss of 10% of usual body weight within 6 months or 5% within 1 month; children — weight-for-length, weight-for-height, or sex < 10th percentile or inadequate weight gain or a significant decrease in usual growth percentile; neonates — extremely low birth weight <1000 g. 2) Evidence of structural or functional bowel disease or a condition in which the gastrointestinal tract is non-functioning or oral/tube feedings are inappropriate, including but not limited to: a) Crohn's disease; b) Short bowel syndrome; c) Single or multiple fistulae (enterocolic, enterovesical, enterocutaneous); d) Obstructing stricture; e) Motility disorder; f) Newborn gastrointestinal anomalies preventing or contraindicating oral feedings (e.g., tracheoesophageal fistula, gastroschisis, omphalocele, massive intestinal atresia); g) Infants/young children who fail to thrive due to cardiac or respiratory disease, short bowel syndrome, malabsorption, or chronic idiopathic diarrhea; h) Paralytic ileus in children or prolonged paralytic ileus following major surgery or multiple injuries; i) Radiation enteritis; j) Liver failure in children approved for liver transplant who fail to grow while receiving enteral nutritional support; k) Liver failure in adults with hepatic encephalopathy who cannot tolerate standard amino acid protein sources or enteral support (including use of liver-specific amino acid mixtures via TPN); l) Acute necrotizing pancreatitis in adults with inadequate oral intake >1 week where enteral feedings exacerbate symptoms; m) Necrotizing enterocolitis; n) Small bowel ischemia.

See policy sections I.A.1 and I.A.2 for full list of conditions.

Initial IDPN Coverage

Covered when ALL of the following are met

IDPN eligibility: 1) Meets TPN criteria in section A; 2) Member/enrollee has stage 5 chronic kidney disease; 3) Member/enrollee is undergoing hemodialysis; 4) IDPN is offered as an alternative to regularly scheduled TPN.

See policy section I.B.

Approval Duration

Approval durations

Approval durations: Initial approval duration for TPN and IDPN is 3 months. Continued approval duration is 6 months provided there is no evidence of unacceptable complications from treatment and documentation supports a positive response to therapy.

See policy criteria for renewal requirements.

The policy identifies specific pediatric oncology scenarios where TPN is considered not proven safe and effective and may be denied. This includes children who were previously well‑nourished or only mildly malnourished and who are undergoing oncologic treatment associated with a low nutrition risk (for example, less advanced disease, less intense cancer treatments, or advanced disease in remission during maintenance treatment). Additionally, TPN is considered not proven when provided for members with advanced cancer documented as unresponsive to chemotherapy or radiation, or when liver transplantation is not feasible and prognosis will not change despite TPN therapy.

When there is a conflict between this clinical policy and state Medicaid coverage provisions for Medicaid members/enrollees, the state Medicaid coverage provisions take precedence. Providers and reviewers should consult the applicable state Medicaid manual for any state‑specific coverage rules that supersede this policy.

Indications listed in section II of the policy are considered not proven safe and effective and therefore not medically necessary per this policy. Examples called out include TPN for previously well‑nourished or mildly malnourished children undergoing low nutrition‑risk oncology treatment, TPN for members with advanced cancer unresponsive to therapy, TPN when liver transplantation is not feasible and prognosis will not change, as well as certain IDPN uses (e.g., IDPN given in addition to regularly scheduled TPN or IDPN for acute kidney injury without ESRD).

Coding and Clinical Thresholds

Prior Authorization

Provider Action — Prior Authorization & Documentation

Prior Authorization is required for Total Parenteral Nutrition (TPN) and Intradialytic Parenteral Nutrition (IDPN). Providers must obtain prior authorization and provide documentation supporting medical necessity, including required clinical documentation of nutritional insufficiency and evidence that conservative/enteral therapies were attempted or are inappropriate. TPN and IDPN coverage determinations follow Medicaid/Medicare rules where applicable. TPN and IDPN have specific coding and billing requirements — use the HCPCS/administration codes listed below when submitting claims. Total Parenteral Nutrition (TPN) and Intradialytic Parenteral Nutrition (IDPN) are considered not proven safe and effective for indications not listed in the policy; TPN and IDPN provided without meeting coverage criteria or without prior authorization may be denied.

PA required for TPN and IDPN
Providers must submit prior authorization and clinical documentation demonstrating nutritional insufficiency and reason enteral nutrition is inappropriate
Medicaid/Medicare compliance applies where relevant — follow applicable program rules

Home infusion / TPN supply and administration (covered when criteria met)HCPCSCovered

B4164	Parenteral nutrition solutions and supplies
B9004	Parenteral nutrition infusion pump, portable
B9006	Parenteral nutrition infusion pump, stationary
S9364	Home infusion therapy, total parenteral nutrition (TPN); administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment including standard TPN formula, per diem
S9365	Home infusion therapy, total parenteral nutrition (TPN); one liter per day, administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment including standard TPN formula, per diem
S9366	Home infusion therapy, total parenteral nutrition (TPN); >1L to <=2L per day, administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment including standard TPN formula, per diem
S9367	Home infusion therapy, total parenteral nutrition (TPN); >2L to <=3L per day, administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment including standard TPN formula, per diem
S9368	Home infusion therapy, total parenteral nutrition (TPN); >3L per day, administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment including standard TPN formula, per diem

Provider Actions, Documentation & Billing Guidance

Prior Authorization

Follow plan prior authorization and administrative policies

Follow the Health Plan's administrative policies and any applicable prior authorization processes; this clinical policy is a guide to medical necessity but does not guarantee payment.

Providers must comply with plan-level PA procedures and coverage terms when submitting requests

Step Therapy

Trial conservative nutrition (oral/enteral) before IDPN

Before considering IDPN, attempt conservative measures such as oral nutritional supplements or enteral nutrition when feasible; reserve IDPN for patients unable to meet needs orally and who are not candidates for enteral nutrition or TPN.

Document efforts and reasons oral/enteral routes were inadequate or not feasible prior to IDPN request

Note

Background and Rationale

Parenteral nutrition provides macronutrients and micronutrients intravenously when the gastrointestinal tract cannot meet nutritional needs. Total parenteral nutrition (TPN) delivers all required nutrients via peripheral or central venous access and may be used short‑term or long‑term depending on the clinical context. Intradialytic parenteral nutrition (IDPN) is parenteral nutrition administered during hemodialysis for patients with stage 5 chronic kidney disease who remain malnourished despite oral supplementation; IDPN provides partial nutrient replacement and is offered as an alternative to regularly scheduled TPN in appropriate candidates.

Definitions

inv-22: Definition of TPN — intravenous administration of macronutrients and micronutrients when enteral nutrition is not possible

DefinitionTotal parenteral nutrition (TPN) is the intravenous administration of all necessary macronutrients and micronutrients that bypasses the gastrointestinal tract and meets a patient’s nutritional requirements when enteral nutrition cannot meet needs.

ComponentsIncludes macronutrients (proteins, fats, carbohydrates) and micronutrients (vitamins, minerals, trace elements)

IndicationsIndicated when the GI tract is incapable of digesting or absorbing nutrients via enteral (oral or tube) routes

inv-23: Definition of IDPN — parenteral nutrition administered during hemodialysis for patients with stage 5 CKD

DefinitionIntradialytic parenteral nutrition (IDPN) is parenteral nutrition administered during hemodialysis through the dialysis access for patients with stage 5 chronic kidney disease who remain malnourished despite oral supplements