Specific code 2015 ICD-9-CM Diagnosis Code 243
Congenital hypothyroidism
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 243 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 243 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 243 converts approximately to:
  • 2015/16 ICD-10-CM E00.9 Congenital iodine-deficiency syndrome, unspecified
Approximate Synonyms
  • Congenital iodine deficiency syndrome
  • Congenital iodine deficiency syndrome - mixed type
  • Congenital iodine deficiency syndrome - neurological type
  • Congenital iodine deficiency syndrome, mixed type
  • Congenital iodine deficiency syndrome, myxedematous
  • Congenital iodine deficiency syndrome, myxedematous ty
  • Congenital iodine deficiency syndrome, myxedematous type
  • Congenital iodine deficiency syndrome, neurological type
  • Endemic congenital iodine deficiency syndrome of myxedematous type
  • Endemic cretinism
  • Hypothyroidism, congenital
Clinical Information
  • A condition in infancy or early childhood due to an in-utero deficiency of thyroid hormones that can be caused by genetic or environmental factors, such as thyroid dysgenesis or hypothyroidism in infants of mothers treated with thiouracil during pregnancy. Endemic cretinism is the result of iodine deficiency. Clinical symptoms include severe mental retardation, impaired skeletal development, short stature, and myxedema
  • A deficiency of thyroid hormone present at birth. The etiology can be genetic or environmental, or a combination of both; treatment is based on severity and causality
  • Condition due to congenital lack of thyroid hormone, marked by arrested physical and mental development, dystrophy of the bones and soft parts, and lowered basal metabolism; it is the congenital form of thyroid deficiency, while myxedema is the acquired form
243 Excludes
  • congenital (dyshormonogenic) goiter (246.1)
Applies To
  • Congenital thyroid insufficiency
  • Cretinism (athyrotic) (endemic)
Use Additional
  • Use additional code to identify associated intellectual disabilities
ICD-9-CM Volume 2 Index entries containing back-references to 243:
  • Absence (organ or part) (complete or partial)
    • thyroid (gland) (surgical) 246.8
      • with hypothyroidism 244.0
      • cartilage, congenital 748.3
      • congenital 243
  • Agenesis - see also Absence, by site, congenital
    • thyroid (gland) 243
  • Aplasia - see also Agenesis
    • thyroid 243
  • Athyrea (acquired) (see also Hypothyroidism) 244.9
    • congenital 243
  • Athyreosis (congenital) 243
    • acquired - see Hypothyroidism
  • Athyroidism (acquired) (see also Hypothyroidism) 244.9
    • congenital 243
  • Atrophy, atrophic
    • thyroid (gland) 246.8
      • with
        • cretinism 243
        • myxedema 244.9
      • congenital 243
  • Cretin, cretinism (athyrotic) (congenital) (endemic) (metabolic) (nongoitrous) (sporadic) 243
    • goitrous (sporadic) 246.1
    • pelvis (dwarf type) (male type) 243
      • with disproportion (fetopelvic) 653.1
        • affecting fetus or newborn 763.1
        • causing obstructed labor 660.1
          • affecting fetus or newborn 763.1
  • Cretinoid degeneration 243
  • Deaf mutism (acquired) (congenital) NEC 389.7
    • endemic 243
  • Degeneration, degenerative
    • cretinoid 243
  • Goiter (adolescent) (colloid) (diffuse) (dipping) (due to iodine deficiency) (endemic) (euthyroid) (heart) (hyperplastic) (internal) (intrathoracic) (juvenile) (mixed type) (nonendemic) (parenchymatous) (plunging) (sporadic) (subclavicular) (substernal) 240.9
    • familial (with deaf-mutism) 243
  • Hypoplasia, hypoplasis 759.89
    • thyroid (gland) 243
  • Hypothyroidism (acquired) 244.9
    • congenital 243
  • Insufficiency, insufficient
    • thyroid (gland) (acquired) - see also Hypothyroidism
      • congenital 243
  • Myxedema (adult) (idiocy) (infantile) (juvenile) (thyroid gland) (see also Hypothyroidism) 244.9
    • congenital 243
  • Pendred's syndrome (familial goiter with deaf-mutism) 243
  • Subthyroidism (acquired) (see also Hypothyroidism) 244.9
    • congenital 243
  • Syndrome - see also Disease
    • Pendred's (familial goiter with deaf-mutism) 243
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 243 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.