2027 ICD-10-CM Diagnosis Code H04.012Acute dacryoadenitis, left lacrimal gland

ICD-10-CM Codes›H00–H59›H00-H05›H04

ICD-10-CM H04.012
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H04.012 is a billable ICD-10-CM diagnosis code for acute dacryoadenitis, left lacrimal gland. 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. Coders also document this condition as acute dacryoadenitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Oculofacial plastics and orbital conditions.

Code Identity

ICD-10-CM Code
H04.012
Billable Status
Yes — Valid for Submission
Code Describes
Acute dacryoadenitis, left lacrimal gland
Short Description
Acute dacryoadenitis, left lacrimal gland
Same as the full description in the CMS dataset.
Parent Code
H04.01
Acute dacryoadenitis

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH00-H05Disorders of eyelid, lacrimal system and orbit
CategoryH04Disorders of lacrimal system
This CodeH04.012Acute dacryoadenitis, left lacrimal gland

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute dacryoadenitis
  • Acute dacryoadenitis of left eye
  • Dacryoadenitis of left eye

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H04.012: its own notes plus those printed at H04, 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 H04 Disorders of lacrimal system applies to 120 codes
  • congenital malformations of lacrimal system (Q10.4-Q10.6)

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)

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 H04.012, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming H04.012: its condition is not part of those codes, and both may be reported when the patient has both.

  • L02.0 Cutaneous abscess, furuncle and carbuncle of face
    abscess of lacrimal gland (H04.0) names H04.0, which includes this code

Clinical ClassificationClinical

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

CCSR EYE008
Oculofacial plastics and orbital conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Dacryoadenitis

    inflammation and enlargement of the lacrimal gland.

Patient EducationClinical

Tears

You may only think of tears as those salty drops that fall from your eyes when you cry. Actually, your tears clean your eyes every time you blink. Tears also keep your eyes moist, which is important for your vision.

Read the full article at MedlinePlus

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

Convert H04.012 to ICD-9-CMHistory

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

ICD-9-CM
375.01 Acute dacryoadenitis
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 H04.012Overview

What is the ICD-10 code for acute dacryoadenitis, left lacrimal gland?

The ICD-10-CM code for acute dacryoadenitis, left lacrimal gland is H04.012 (sometimes written as H04012). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H04.012 (Acute dacryoadenitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acute dacryoadenitis, left lacrimal gland on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H04.012 group to?

When acute dacryoadenitis, left lacrimal gland 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.

What is the ICD-9 equivalent of H04.012?

Under the General Equivalence Mappings, acute dacryoadenitis, left lacrimal gland converts to ICD-9-CM 375.01 (acute dacryoadenitis). The mapping is approximate, so confirm the match fits the documentation.