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E84.11 ICD-10-CM Code: Meconium ileus in cystic fibrosis

E84.11 maps to CMS-HCC V28 277. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC Buddy coding tools

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Code lookupE84.11

FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Metabolic disorders (E70-E88)

E84.11

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Meconium ileus in cystic fibrosis

Meconium ileus is a serious intestinal blockage in newborns with cystic fibrosis caused by thick, sticky meconium (first stool) that cannot pass normally.

Buddy the Bee presenting code insight

Buddy Insight

Meconium ileus is a neonatal intestinal obstruction occurring in approximately 15-20% of newborns with cystic fibrosis and is often the presenting sign of the disease.

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

HCC 277

Coefficient HCC 277: 0.998 (Community Non-Dual Aged (CNA))

CMS-HCC V24

Historical

Historical

Not used for CY2026 payment

ACA/HHS

Context needed

HCC 159

Coefficient needs member context

ESRD/PACE

Context needed

HCC 110

Coefficient needs member context

RXHCC

Context needed

HCC 225

Coefficient needs member context

Code Book Path

Official
E84Cystic fibrosisE84.1Cystic fibrosis with intestinal manifestationsE84.11Meconium ileus in cystic fibrosis

Inclusion Terms

Official

No inclusion terms are included in this display for E84.11. Check the code and parent instructions in the Code Book.

Excludes 2

Official
  • Ehlers-Danlos syndromes (Q79.6-)Inherited from E70-E88

Related Codes

Official
E84.19Cystic fibrosis with other intestinal manifestations

Includes

Official
  • mucoviscidosisInherited from E84

Excludes 1

Official
  • meconium ileus not due to cystic fibrosis (P76.0)
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)Inherited from E00-E89, E70-E88
  • androgen insensitivity syndrome (E34.5-)Inherited from E00-E89, E70-E88
  • congenital adrenal hyperplasia (E25.0)Inherited from E00-E89, E70-E88
  • hemolytic anemias attributable to enzyme disorders (D55.-)Inherited from E00-E89, E70-E88
  • Marfan syndrome (Q87.4-)Inherited from E00-E89, E70-E88
  • 5-alpha-reductase deficiency (E29.1)Inherited from E00-E89, E70-E88

Code First

Official

No Code First sequencing instructions are included in this display for E84.11. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for E84.11. Check the code and parent instructions in the Code Book.

Code Also

Official
  • exocrine pancreatic insufficiency (K86.81)Inherited from E84

Buddy Documentation Tip

HCC Buddy guidance
Confirmed cystic fibrosis diagnosis
Documentation of meconium ileus (current or historical)
Surgical intervention history if applicable (bowel resection, ostomy)
Ongoing GI complications from meconium ileus

MEAT Support

HCC Buddy guidance
Confirmed cystic fibrosis diagnosis
Documentation of meconium ileus (current or historical)
Surgical intervention history if applicable (bowel resection, ostomy)
Ongoing GI complications from meconium ileus

Audit Caution

HCC Buddy guidance
Coding meconium ileus without confirming cystic fibrosis as the underlying etiology
Using this code in adult patients without confirming it is still clinically relevant and actively managed
Not coding additional CF manifestation codes when pulmonary disease is also present
Confusing meconium plug syndrome (P76.0) with meconium ileus in cystic fibrosis

Common Mistakes

HCC Buddy guidance
E84.19 — Cystic fibrosis with other intestinal manifestations: use for non-meconium-ileus GI involvement (DIOS, rectal prolapse)
E84.0 — Cystic fibrosis with pulmonary manifestations: for pulmonary involvement; may be coded in addition to E84.11
P76.0 — Meconium plug syndrome: neonatal condition NOT associated with cystic fibrosis
K56.0 — Paralytic ileus: acquired ileus not related to meconium or cystic fibrosis

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is E84.11 an HCC code?

Yes. E84.11 (Meconium ileus in cystic fibrosis) maps to HCC 277, Cystic Fibrosis under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.998. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: E84.11 is billable and maps to V28 HCC 277, Cystic Fibrosis. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code
E84.11
Description
Meconium ileus in cystic fibrosis
HCC (V28)
HCC 277 — Cystic Fibrosis
RAF reference coefficient
0.998
Billable
Yes
Payment year
2026

HCC Category Mapping

V28HCC 277, Cystic Fibrosis
0.998

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work E84.11 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for E84.11

For E84.11, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

  • MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
  • EEvaluate: test results, medication response, or physical findings reviewed by the provider
  • AAssess: explicit mention in the assessment or plan with acknowledgment of status
  • TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Coder workflow notes

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What This Code Means

E84.11 is the ICD-10-CM diagnosis code for meconium ileus in cystic fibrosis. Meconium ileus is a serious intestinal blockage in newborns with cystic fibrosis caused by thick, sticky meconium (first stool) that cannot pass normally. E84.11 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering metabolic disorders (e70-e88).

Under the CMS-HCC V28 risk adjustment model, E84.11 maps to Cystic Fibrosis (HCC 277) with a source-labeled community, non-dual, aged reference coefficient of 0.998. No V24 mapping is shown for E84.11; use the applicable model and payment year when reviewing the V28 mapping. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

This code is typically used in neonatal cases; verify the patient's age and clinical presentation matches meconium ileus specifically. For E84.11, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for E84.11 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • •This code is typically used in neonatal cases; verify the patient's age and clinical presentation matches meconium ileus specifically
  • •Document whether surgical intervention was required, as this affects severity and treatment coding

Clinical Significance

Meconium ileus is a neonatal intestinal obstruction occurring in approximately 15-20% of newborns with cystic fibrosis and is often the presenting sign of the disease.

Documentation Requirements

  • ✓Confirmed cystic fibrosis diagnosis
  • ✓Documentation of meconium ileus (current or historical)
  • ✓Surgical intervention history if applicable (bowel resection, ostomy)
  • ✓Ongoing GI complications from meconium ileus
  • ✓Current CF management plan including pancreatic enzyme replacement

Excludes 1, Do NOT code together

  • meconium ileus not due to cystic fibrosis (P76.0)

Commonly Confused Codes

  • •E84.19: Cystic fibrosis with other intestinal manifestations: use for non-meconium-ileus GI involvement (DIOS, rectal prolapse)
  • •E84.0: Cystic fibrosis with pulmonary manifestations: for pulmonary involvement; may be coded in addition to E84.11
  • •P76.0: Meconium plug syndrome: neonatal condition NOT associated with cystic fibrosis
  • •K56.0: Paralytic ileus: acquired ileus not related to meconium or cystic fibrosis

Child Codes

E84.11Meconium ileus in cystic fibrosis
HCC 277
E84.19Cystic fibrosis with other intestinal manifestations
HCC 277

Code Hierarchy

└E84Cystic fibrosis└E84.1Cystic fibrosis with intestinal manifestations└E84.11Meconium ileus in cystic fibrosis
└E84.11Meconium ileus in cystic fibrosis

Also searched as

  • E84 11
  • E8411

For E84.11, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

E84.11 maps to CMS-HCC V28 category 277, Cystic Fibrosis. See the ICD-10 to HCC mapping hub for how the V28 crosswalk works. The mapping identifies a payment HCC category for E84.11. Review its source-labeled HCC coefficient above, check the RAF Calculator with complete member context for CMS-HCC V28 PY2026, and confirm the documentation the chart needs before the code is submitted. HCC Buddy shows no RAF score unless every required source and calculation check passes.

Work E84.11 in HCC Buddy

Open E84.11 in the Code Book for the full Index-to-Tabular path, MEAT checklist, and V28 HCC mapping, or in the Encoder to code from a keyword search. Pro includes 7 days to try everything, no card required.

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