ICD-10-CM 2027 diagnosis code
D44.2Neoplasm of uncertain behavior of parathyroid gland
D44.2 is a valid, billable ICD-10-CM code for neoplasm of uncertain behavior of parathyroid gland. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About D44.2
D44.2 is the ICD-10-CM diagnosis code for neoplasm of uncertain behavior of parathyroid gland. It belongs to category D44 (neoplasm of uncertain behavior of endocrine glands), block D37-D48 (neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes) and chapter 2 (neoplasms). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within D44 (neoplasm of uncertain behavior of endocrine glands), D44.2 is specifically for neoplasm of uncertain behavior of parathyroid gland. Related codes cover thyroid gland (D44.0), adrenal gland (D44.1), pituitary gland (D44.3), craniopharyngeal duct (D44.4), pineal gland (D44.5), carotid body (D44.6), aortic body and other paraganglia (D44.7) and unspecified endocrine gland (D44.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 643 (Endocrine Disorders with MCC, relative weight 1.6139), DRG 644 (Endocrine Disorders with CC, relative weight 1.0044) and DRG 645 (Endocrine Disorders without CC/MCC, relative weight 0.7459), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 237.4 (neoplasm of uncertain behavior of other and unspecified endocrine glands).
Notes that apply from higher levels
Instructions written at a parent level also apply to D44.2.
Broader instructions also apply from D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes and Chapter 2: Neoplasms.
Table of Drugs & Neoplasms entries
- Neoplasm, neoplastic › parathyroid (gland) — Uncertain Behavior
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 10 · Endocrine, Nutritional and Metabolic Diseases and Disorders
ICD-9-CM equivalent
Converter →- 237.4Neoplasm of uncertain behavior of other and unspecified endocrine glandsapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about D44.2
Is D44.2 billable?
- Yes. D44.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D44.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D44.2 as a principal diagnosis.
Is D44.2 a CC or MCC?
- No. D44.2 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does D44.2 group to?
- D44.2 is used in the MS-DRG v44.0 logic for MS-DRG 643 (Endocrine Disorders with MCC), MS-DRG 644 (Endocrine Disorders with CC) and MS-DRG 645 (Endocrine Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for D44.2?
- The CMS General Equivalence Mappings map D44.2 to ICD-9-CM 237.4.