E20.818 — Other specified hypoparathyroidism due to impaired parathyroid hormone secretion
Is E20.818 billable?
Yes, but E20.818 is an unspecified code. E20.818 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, E20.818 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting E20.818 — the more specific alternatives are listed below.
E20.818 at a glance
| Code | E20.818 |
|---|---|
| Description | Other specified hypoparathyroidism due to impaired parathyroid hormone secretion |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does E20.818 group to?
E20.818 sits in MDC 10 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 643Endocrine Disorders with MCCmedical
- 644Endocrine Disorders with CCmedical
- 645Endocrine Disorders without CC/MCCmedical
How is E20.818 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to E20.818. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Hypoparathyroidism › familial › isolated
- Hypoparathyroidism › specified NEC › due to impaired parathyroid hormone secretion
Inclusion terms
Alternative wording in documentation that is classified to E20.818.
- Familial isolated hypoparathyroidism
Excludes1 — never code together — inherited from Chapter 4
The conditions below can never be reported together with E20.818 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- transitory endocrine and metabolic disorders specific to newborn (P70-P74)
Excludes1 — never code together — inherited from E20-E35
The conditions below can never be reported together with E20.818 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from E20
The conditions below can never be reported together with E20.818 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
How long has E20.818 existed?
E20.818 first appears in FY2024.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.