2027 ICD-10-CM Diagnosis Code H44.122Parasitic endophthalmitis, unspecified, left eye

ICD-10-CM Codes›H00–H59›H43-H44›H44

ICD-10-CM H44.122
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H44.122 is a billable ICD-10-CM diagnosis code for parasitic endophthalmitis, unspecified, left eye. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 121 through 122. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 29 closely related codes. Coders also document this condition as left parasitic endophthalmitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Uveitis and ocular inflammation.

Code Identity

ICD-10-CM Code
H44.122
Billable Status
Yes — Valid for Submission
Code Describes
Parasitic endophthalmitis, unspecified, left eye
Short Description
Parasitic endophthalmitis, unspecified, left eye
Same as the full description in the CMS dataset.
Parent Code
H44.12
Parasitic endophthalmitis, unspecified

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH43-H44Disorders of vitreous body and globe
CategoryH44Disorders of globe
This CodeH44.122Parasitic endophthalmitis, unspecified, left eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Left parasitic endophthalmitis
  • Parasitic endophthalmitis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H44.122: its own notes plus those printed at H44.1, H44, and Chapter 7. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From H44 Disorders of globe applies to 158 codes
  • disorders affecting multiple structures of eye

Excludes1

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

From H44.1 Other endophthalmitis applies to 13 codes
  • bleb associated endophthalmitis (H59.4-)

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 H44.1 Other endophthalmitis applies to 13 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)

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.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name H44.122, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming H44.122: its condition is not part of those codes, and both may be reported when the patient has both.

  • H21 Other disorders of iris and ciliary body
    sympathetic uveitis (H44.1-) names H44.1-, which includes this code

Clinical ClassificationClinical

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

CCSR EYE004
Uveitis and ocular inflammation
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Parasitic Endophthalmitis

    infection of the interior of the eye, especially the aqueous and/or vitreous humor, by a parasite.

Patient EducationClinical

Eye Infections

Your eyes can get infections from bacteria, fungi, or viruses. Eye infections can occur in different parts of the eye and can affect just one eye or both. Two common eye infections are:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H44.122 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
360.13 Parasitic endophthal NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H44.122Overview

What is the ICD-10 code for parasitic endophthalmitis, unspecified, left eye?

The ICD-10-CM code for parasitic endophthalmitis, unspecified, left eye is H44.122 (sometimes written as H44122). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H44.122 (Parasitic endophthalmitis, unspecified) a billable code?

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

What MS-DRG does H44.122 group to?

When parasitic endophthalmitis, unspecified, left eye is the principal diagnosis on an inpatient stay, it groups to MS-DRG 122, 121, with relative weights from 0.7403 to 1.2249 depending on complications. Higher weights mean higher Medicare reimbursement.

Is H44.122 a CC or MCC?

CMS lists H44.122 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 29 closely related codes in its exclusion list.

Can H44.122 be reported with a code from H59.4?

Not as a rule. The Excludes1 note at H44.1, which applies to H44.122, lists "bleb associated endophthalmitis (H59.4-)". 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).