- E21.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2024 edition of ICD-10-CM E21.0 became effective on October 1, 2022.
- This is the American ICD-10-CM version of E21.0 – other international versions of ICD-10 E21.0 may differ.
ICD-10-CM E21.0 is grouped within Diagnostic Related Group(s):
- 643 Endocrine disorders with mcc
- 644 Endocrine disorders with cc
- 645 Endocrine disorders without cc/mcc
Applicable To
- Hyperplasia of parathyroid
- Osteitis fibrosa cystica generalisata [von Recklinghausen’s disease of bone]
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2016 (effective 10/1/2015): No change
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2024 (effective 10/1/2022): No change
Diagnosis Index entries containing back-references to E21.0:
- fibrosa cystica > osteitis M88.88
- osteofibrocystic > Disease, diseased
- parathyroid (gland) > Enlargement, enlarged
- primary > Hyperparathyroidism E21.3
- parathyroid (gland) > Hyperplasia, hyperplastic
- parathyroid (gland) > Hypertrophy, hypertrophic
- cystica (generalisata) > fibrosa NEC
- osteoplastica > fibrosa NEC
- parathyroid > Osteitis
- bones > Recklinghausen disease Q85.01
- bones > disease (neurofibromatosis) Q85.01