2027 ICD-10-CM Diagnosis Code H05.839Thyroid orbitopathy, unspecified orbit

ICD-10-CM Codes›H00–H59›H00-H05›H05

ICD-10-CM H05.839
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H05.839 is a billable ICD-10-CM diagnosis code for thyroid orbitopathy, unspecified orbit. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Oculofacial plastics and orbital conditions and Thyroid disorders.

Code Identity

ICD-10-CM Code
H05.839
Billable Status
Yes — Valid for Submission
Code Describes
Thyroid orbitopathy, unspecified orbit
Short Description
Thyroid orbitopathy, unspecified orbit
Same as the full description in the CMS dataset.
Parent Code
H05.83
Thyroid orbitopathy

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH00-H05Disorders of eyelid, lacrimal system and orbit
CategoryH05Disorders of orbit
This CodeH05.839Thyroid orbitopathy, unspecified orbit

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H05.839: its own notes plus those printed at H05.83, H05, block H00-H05, and Chapter 7. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From H05 Disorders of orbit applies to 102 codes
  • congenital malformation of orbit (Q10.7)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block H00-H05 Disorders of eyelid, lacrimal system and orbit applies to 574 codes
From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury (trauma) of eye and orbit (S05.-)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From H05.83 Thyroid orbitopathy applies to 4 codes
  • if applicable, any associated conditions such as:
  • autoimmune thyroiditis (E06.3)
  • thyrotoxicosis with diffuse goiter (E05.0-)

Notes

General instructions on how these codes are used.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EYE008
Oculofacial plastics and orbital conditions
Default principal diagnosis: inpatient No · outpatient No
CCSR END001
Thyroid disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Graves Ophthalmopathy

    an autoimmune disorder of the eye, occurring in patients with graves disease. subtypes include congestive (inflammation of the orbital connective tissue), myopathic (swelling and dysfunction of the extraocular muscles), and mixed congestive-myopathic ophthalmopathy.

Code History & ChangesHistory

Replacement H05.839 replaces the following previously assigned code(s):

  • H05.83 - Thyroid orbitopathy
FY 2026AddedAdded to the ICD-10-CM code setEffective October 1, 2025.
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H05.839Overview

What is the ICD-10 code for thyroid orbitopathy, unspecified orbit?

The ICD-10-CM code for thyroid orbitopathy, unspecified orbit is H05.839 (sometimes written as H05839). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H05.839 (Thyroid orbitopathy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report thyroid orbitopathy, unspecified orbit on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H05.839 group to?

When thyroid orbitopathy, unspecified orbit is the principal diagnosis on an inpatient stay, it groups to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.

Can H05.839 be reported with Q10.7?

Not as a rule. The Excludes1 note at H05, which applies to H05.839, lists "congenital malformation of orbit (Q10.7)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).