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F98.21 vs P92

F98.21 (Rumination disorder of infancy and childhood) compared with P92 (Feeding problems of newborn), from the official CMS tabular data.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Summary

These codes can be reported together when both conditions are documented, because F98.21 lists P92 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named, billing status and chapter.F98.21 is “Rumination disorder of infancy and childhood”; P92 is “Feeding problems of newborn”. P92 is a non-billable header; F98.21 is billable. F98.21 sits in F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99); P92 in P00-P96 — Certain Conditions Originating in the Perinatal Period (P00-P96).

Registry fact

Can these codes be reported together?

Yes, when both are documented.F98.21 lists P92 under Excludes2: “feeding problems of newborn (P92.-)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes2 relationship?

Yes.F98.21’s tabular entry: “feeding problems of newborn (P92.-)”. The note covers P92.

Official ruleGuide: Excludes1 vs Excludes2

Is one a parent or header code?

One is a header.P92 is a non-billable header, but F98.21 is not one of its subdivisions.

Registry fact

Nothing found in 3 other checks; 1 check does not apply
Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. F98.21 carries 1 Excludes1 note and P92 carries 1 Excludes1 note covering other codes; the side-by-side table quotes them.

Official rule

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

F98.21
Rumination disorder of infancy and childhood
↔
P92
Feeding problems of newborn

What we found

Yes, when both are documented.F98.21 carries an Excludes2 note covering P92: “feeding problems of newborn (P92.-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

  • Section I.A.12.b — Excludes2 · applies to: Excludes2

    A type 2 Excludes note represents “Not included here.” An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

    ICD-10-CM Official Guidelines FY2027

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

Similar descriptions do not make codes interchangeable. The documentation and the official instructions decide which code applies.

Official descriptionDiffers
F98.21

Rumination disorder of infancy and childhood

P92

Feeding problems of newborn

StatusDiffers
F98.21
Billable
P92
Non-billable header

A header is not reported on a claim; a code beneath it is.

Report instead: P92.01, P92.09, P92.1, P92.2, P92.3

Excludes1Differs
F98.21
  • rumination disorder in adults (F50.84)
P92
  • eating disorders (F50.-)
Excludes2Differs
F98.21
  • anorexia nervosa and other eating disorders (F50.-)
  • feeding difficulties (R63.3-)
  • feeding problems of newborn (P92.-)
  • pica of infancy or childhood (F98.3)
  • breath-holding spells (R06.89)
  • gender identity disorder of childhood (F64.2)
  • Kleine-Levin syndrome (G47.13)
  • obsessive-compulsive disorder (F42.-)
  • sleep disorders not due to a substance or known physiological condition (F51.-)
P92
  • feeding problems in child over 28 days old (R63.3-)
CategoryDiffers
F98.21

F98 Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence

P92

Is itself a category

ChapterDiffers
F98.21

F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99)

P92

P00-P96 — Certain Conditions Originating in the Perinatal Period (P00-P96)

IncludesDiffers
F98.21
  • Rumination disorder in infancy or childhood, in remission
P92

None at this code

No Code first, Use additional code, Code also and 7th character note at either code.

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on. In a row that differs, each code’s own notes are listed under it, and the notes every code shares are listed once beneath them.

Edit this comparisonCheck a whole claim

Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources