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R62.51

R62.51Failure to thrive (child)

Billable / specific codeICD-10-CM

R62.51 is a billable, specific ICD-10-CM code for failure to thrive (child). It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • failure to thrive in child under 28 days old (P92.6)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Failure to gain weight
  • Faltering growth

Other codes that can never be billed with R62.51

These codes carry an Excludes1 note pointing at R62.51. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R62.51 alone.

  • P92.6Failure to thrive in newborn

Risk adjustment

R62.51 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

R62.51 is named in 1 Medicare coverage policy 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A56679Billing and Coding: Hospice The Adult Failure To Thrive Syndrome

How R62.51 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to R62.51.

  • Faltering growth
  • Failure, failedgain weight(child over 28 days old)
  • Failure, failedto thrive(child over 28 days old)
  • Lack ofdevelopmentfailure to thrive(child over 28 days old)

Related codes at this level

Codes that share R62.5. If R62.51 is not quite right, the correct code is usually one of these.

Questions about R62.51

Is R62.51 a billable ICD-10-CM code?
Yes. R62.51 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does R62.51 sit in the tabular list?
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block General symptoms and signs (R50-R69).
What cannot be coded together with R62.51?
R62.51 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.