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E00.9

E00.9Congenital iodine-deficiency syndrome, unspecified

Billable / specific codeICD-10-CM

E00.9 is a billable, specific ICD-10-CM code for congenital iodine-deficiency syndrome, unspecified. It is valid for submission on a claim.

Inclusion terms

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

  • Congenital iodine-deficiency hypothyroidism NOS
  • Endemic cretinism NOS

Risk adjustment

E00.9 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

E00.9 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.

  • A57361Billing and Coding: Monitored Anesthesia Care

How E00.9 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 E00.9.

  • Cretin, cretinism(congenital) (endemic) (nongoitrous) (sporadic)
  • Syndromeiodine-deficiency, congenital
  • Myopathyincretinism

Related codes at this level

Codes that share E00. If E00.9 is not quite right, the correct code is usually one of these.

Questions about E00.9

Is E00.9 a billable ICD-10-CM code?
Yes. E00.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does E00.9 sit in the tabular list?
Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of thyroid gland (E00-E07).
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.