ModifiedCentenePolicy CP.MP.163

Total Parenteral Nutrition and Intradialytic Parenteral Nutrition

Medical necessity criteria, indications, limitations, and coding implications for TPN and IDPN for members/enrollees of Centene-affiliated health plans.

Policy Summary

PayerCentene

PolicyTotal Parenteral Nutrition and Intradialytic Parenteral Nutrition

Policy CodePolicy CP.MP.163

Change TypeCriteria revisions and clarifications (material)

Effective Date

Next Review Date

Key ActionObtain prior authorization and document medical necessity including age-specific weight loss or growth metrics and evidence that enteral nutrition is inappropriate.

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 prior criteria regarding total protein and serum albumin.

Added indications including radiation enteritis, liver failure in children and adults, and acute necrotizing pancreatitis in adults to the list of conditions making oral or tube feedings inappropriate.

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

3 monthsinitial approval duration

6 monthscontinued approval duration

20-70%malnutrition prevalence on dialysis

<3.4 g/dL

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.

albumin threshold (IDPN)

Medicaid/Medicareadministrative precedence

Medical Necessity Criteria for TPN and IDPN

Intradialytic Parenteral Nutrition (IDPN) — Initial Coverage

Covered when ALL of the following are met

IDPN coverage criteria: 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.all criteria must be met

Initial approval 3 months; continued approval 6 months with documentation of positive response and absence of unacceptable complications.

TPN may be considered not proven safe and effective for certain pediatric oncology situations and in patients with advanced, treatment‑refractory cancer. Specifically, TPN is not proven safe and effective for children who were previously well nourished or only mildly malnourished and who are undergoing oncologic treatment associated with low nutrition risk (for example, less advanced disease or less intensive therapy and maintenance-phase disease in remission). The policy also identifies members with advanced cancer unresponsive to chemotherapy or radiation as a population where TPN may be inappropriate because prognosis will not change. These limitations should inform authorization decisions and clinical discussions about goals of care and expected benefit.

IDPN is limited by evidence and clinical positioning: it is intended as an option for patients on hemodialysis with stage 5 chronic kidney disease who remain malnourished despite other measures. The policy explicitly states that IDPN treatments offered in addition to regularly scheduled infusions of TPN are not proven safe and effective. Providers should therefore not expect concurrent use of routine TPN and IDPN to meet medical necessity based on this policy.

When state Medicaid coverage provisions conflict with this clinical policy, state Medicaid provisions take precedence. Providers should refer to the applicable state Medicaid manual for any differing coverage provisions or exclusions before submitting claims or requesting prior authorization. Similarly, for Medicare members/enrollees, applicable NCDs and LCDs should be reviewed to ensure consistency with Medicare coverage rules.

The policy explicitly lists two situations where IDPN is considered not proven safe and effective: IDPN for acute kidney injury in patients who do not have end‑stage renal disease (ESRD), and IDPN administered in addition to regularly scheduled TPN. Authorization requests in these scenarios are at high risk for denial under this policy.

Billing Codes and Key Clinical Thresholds

Parenteral nutrition HCPCS/S codesHCPCS

B4164-B5200	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 (do not use with home infusion codes S9365 through S9368 using daily volume scales).
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); more than one liter but no more than two liters 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); more than two liters but no more than three liters per day, administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment including standard TPN formula, per diem.

Additional home infusion codeHCPCS

S9368

Home infusion therapy, total parenteral nutrition (TPN); more than three liters per day, administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment including standard TPN formula, per diem.

inv-09: Serum albumin — key threshold mentioned for considering IDPN

Serum albumin threshold< 3.4 g/dL — noted in policy as a very low level used to consider IDPN when persistent despite oral supplements

Context for useApplied when patients continue to lose weight or have very low serum albumin despite oral supplements or have severe gastroparesis

Associated patient populationChronic hemodialysis or peritoneal dialysis patients with malnutrition (prevalence 20–70%)

inv-10: Adult weight loss thresholds used as documentation of nutritional insufficiency

Adult weight loss — 6 monthsInvoluntary loss of 10% of usual body weight within six months

Adult weight loss — 1 month

Prior Authorization, Documentation, and Billing Instructions

Prior Authorization

Prior Authorization Required

Prior authorization is required for TPN and IDPN services. Providers must obtain prior authorization from the Health Plan before initiating home infusion or facility-based TPN/IDPN and verify any plan- or state-specific requirements. Use applicable HCPCS/B/S home infusion codes when billing (see coding block elsewhere in this policy) and follow any Health Plan directions for home infusion billing and per‑diem codes.

Prior authorization required for TPN and IDPN
Verify state Medicaid and Medicare NCD/LCD requirements prior to submission
Use HCPCS B4xxx–B5xxx, B9004/B9006, and S9364–S9368 as applicable for home infusion billing

Denial Risk

TPN — Not Proven Safe/Effective in These Situations

TPN is considered not proven safe and effective in specified populations. Do not initiate or continue TPN for these excluded indications; documentation supporting these exclusions should be present in the medical record.

Clinical Background and Scope

Parenteral nutrition provides macronutrients and micronutrients intravenously when the gastrointestinal tract cannot meet nutritional needs. Total Parenteral Nutrition (TPN) delivers full nutritional support via peripheral or central venous access and is used when enteral feeding is not possible or adequate. Intradialytic Parenteral Nutrition (IDPN) is given during hemodialysis through the dialysis access for patients with stage 5 chronic kidney disease who remain malnourished despite oral or enteral strategies and may avoid the need for additional venous access.

Key Definitions

inv-22: Definition — Total Parenteral Nutrition (TPN)

DefinitionTotal Parenteral Nutrition (TPN) — intravenous delivery of all necessary macronutrients and micronutrients that bypasses the gastrointestinal tract

Access routesShort-term: peripheral/central venous catheter; long-term: tunneled central venous catheter or implanted port

Indication summaryIndicated when the GI tract cannot meet nutritional needs or is non-functioning for a period of time

inv-23: Definition — Intradialytic Parenteral Nutrition (IDPN)

DefinitionIntradialytic Parenteral Nutrition (IDPN) — parenteral nutrition administered during hemodialysis through the dialysis access for patients with stage 5 CKD who are malnourished or cannot tolerate oral/enteral nutrition

Nutrient delivery note

Policy Summary

PayerCentene

PolicyTotal Parenteral Nutrition and Intradialytic Parenteral Nutrition

Policy CodePolicy CP.MP.163

Change TypeCriteria revisions and clarifications (material)

Effective Date

Next Review Date

Key ActionObtain prior authorization and document medical necessity including age-specific weight loss or growth metrics and evidence that enteral nutrition is inappropriate.

SourceLink

On This Page

Involuntary loss of 5% of usual body weight within one month

PurposeServes as documentation of nutritional insufficiency when considering TPN

inv-11: Neonate extremely low birth weight threshold (< 1000 g)

Neonate extremely low birth weight< 1000 g

Role in criteriaUsed as documentation of nutritional insufficiency for neonatal TPN consideration

Referenced sectionTPN initial coverage criteria I.A.1.c in policy

Children previously well-nourished or mildly malnourished undergoing low nutrition‑risk oncologic treatment
Members with advanced cancer unresponsive to chemotherapy or radiation therapy
Members for whom liver transplantation is not feasible and prognosis will not change with TPN therapy

Denial Risk

IDPN — Not Proven Safe/Effective in These Situations

IDPN is considered not proven safe and effective when used in addition to scheduled TPN or for patients with acute kidney injury without end‑stage renal disease (ESRD). Providers should not bill or seek authorization for IDPN in these scenarios.

IDPN given in addition to regularly scheduled TPN — excluded
IDPN for patients with acute kidney injury who do not have ESRD/Stage 5 CKD — excluded

Denial Risk

Coverage Precedence and Denial Risk

State Medicaid rules and Medicare NCDs/LCDs may supersede this clinical policy. Providers must review and comply with applicable state Medicaid manuals and Medicare coverage determinations prior to submitting prior authorization requests or claims, as inconsistencies can result in denial of payment.

State Medicaid coverage provisions take precedence over this policy where they conflict
Review Medicare NCDs, LCDs, and Coverage Articles for Medicare members prior to applying policy criteria

Documentation Required

Required Documentation to Support Medical Necessity

Document clinical justification thoroughly to support medical necessity for initiation and continuation of TPN or IDPN. Include objective measurements, clinical diagnoses, and evidence that oral/enteral nutrition was insufficient or inappropriate.

Adults: involuntary weight loss (e.g., ≥10% in 6 months or ≥5% in 1 month)
Children: weight-for-length/height or sex < 10th percentile, inadequate weight gain, or significant decline in growth percentiles
Neonates: extremely low birth weight (e.g., < 1000 g)
Documentation of structural or functional GI disease preventing enteral/oral feeding (examples: short bowel syndrome, fistulae, obstructing stricture, severe motility disorder, NEC, severe pancreatitis, small bowel ischemia)
For IDPN: documentation that TPN criteria are met, the member has stage 5 CKD, is on hemodialysis, and IDPN is being considered as an alternative to regularly scheduled TPN
Clinical progress notes, weight trends, lab data (albumin/prealbumin when relevant), nutrition support consults, and treatment response for continuation requests

Note

Documentation Standard — Follow Accepted Medical Practice

This policy and its documentation expectations are based on generally accepted standards of medical practice and prevailing clinical documentation norms. Providers are expected to follow these standards when preparing prior authorization requests and medical records.

Rely on accepted medical practice standards, peer‑reviewed evidence, and specialty society guidance when documenting necessity
Keep contemporaneous clinical records that substantiate the indications and treatment response

Provides approximately 70% of nutrients to the patient due to loss into the dialysate

Clinical contextUsed for dialysis patients who continue to lose weight or have very low serum albumin despite oral supplements; avoids additional venous catheter placement

inv-24: Related definitions per A.S.P.E.N.

A.S.P.E.N. definitions referencedPolicy references definitions published by the American Society for Parenteral and Enteral Nutrition (A.S.P.E.N.)

Guidance roleA.S.P.E.N. definitions and resources are cited to support terminology and clinical context in the policy

Source link exampleA.S.P.E.N. Definitions toolkit referenced in policy bibliography