243Congenital hypothyroidism
- Legacy / Not Valid for Submission
- Replaced October 1, 2015
243 is a legacy ICD-9-CM diagnosis code for congenital hypothyroidism. It was valid on U.S. claims through September 30, 2015 and cannot be reported for services on or after October 1, 2015, when ICD-10-CM replaced the ICD-9 code set. Under the CMS General Equivalence Mappings, its ICD-10-CM replacement is E00.9 (Congenital iodine-deficiency syndrome, unspecified), flagged as an approximate match.
Code Identity
Convert 243 to ICD-10-CM
Based on the final CMS General Equivalence Mappings (GEMs), 243 crosswalks to the following ICD-10-CM code.
Index of Diseases References
Entries in the final ICD-9-CM Index to Diseases and Injuries that point to 243. Tap the icons for the official index conventions.
- Absence organ or part complete or partial
- thyroid gland surgical 246.8
- congenital 243
- thyroid gland surgical 246.8
- Agenesis SEE ALSO Absence by site congenital
- thyroid gland 243
- cartilage 748.3
- 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
- congenital 243
- with
- thyroid gland 246.8
- Cretin cretinism athyrotic congenital endemic metabolic nongoitrous sporadic 243
- goitrous sporadic 246.1
- pelvis dwarf type male type 243
- pituitary 253.3
- 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
- Hypothyroidism acquired 244.9
- congenital 243
- Insufficiency insufficient
- thyroid gland acquired SEE ALSO Hypothyroidism
- congenital 243
- thyroid gland acquired SEE ALSO Hypothyroidism
- Jaundice yellow 782.4
- 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
- retroviral seroconversion acute V08
- Tumor M8000 1 SEE ALSO Neoplasm by site unspecified nature
- mucocarcinoid malignant M8243 3 see Neoplasm by site malignant
Information for Patients
Hypothyroidism
Hypothyroidism, or underactive thyroid, happens when your thyroid gland doesn't make enough thyroid hormones to meet your body's needs.
Read the full article at MedlinePlus
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Questions About 243
Is 243 (congenital hypothyroidism) still a valid code?
No. This code belonged to ICD-9-CM, which the United States retired after September 30, 2015. Claims with dates of service on or after October 1, 2015 must use ICD-10-CM codes, such as its replacement E00.9.
What is the ICD-10 replacement for 243?
The General Equivalence Mappings crosswalk this code to ICD-10-CM E00.9 (Congenital iodine-deficiency syndrome, unspecified). The match is flagged as approximate, so confirm it against the clinical documentation before use.
What did 243 mean?
In the final ICD-9-CM release, this code described congenital hypothyroidism. It sat in block 243 Congenital hypothyroidism under Endocrine, nutritional and metabolic diseases, and immunity disorders (240–279).
