MS-DRG · FY 2026 v43.0
MS-DRG 123 – Neurological Eye Disorders
A Medical DRG in MDC 02 (Diseases & Disorders of the Eye). Inpatient cases group to DRG 123 when the ICD-10-CM principal diagnosis is one of the 210 codes listed below. Its FY 2026 relative weight is 0.7986 with a geometric mean length of stay of 2.1 days.
Medical DRG – assigned by principal diagnosis✓ Official CMS v43.0 dataset
0.7986
Relative Weight
2.1
Geometric Mean LOS (days)
2.6
Arithmetic Mean LOS (days)
210
Principal Diagnosis Codes
How a case is assigned to DRG 123
The grouper first assigns the case to MDC 02 from the principal diagnosis and finds no qualifying operating-room procedure (this is a Medical DRG; ICD-10-PCS codes do not drive assignment here).
ICD-10-CM
Principal Diagnosis Codes 210 codes · 16 categories
210 of 210 shown
A39 Meningococcal infection1 code
- A39.82 Meningococcal retrobulbar neuritis
G45 Transient cerebral ischemic attacks and related syndromes1 code
- G45.3 Amaurosis fugax
H02 Other disorders of eyelid13 codes
- H02.401 Unspecified ptosis of right eyelid
- H02.402 Unspecified ptosis of left eyelid
- H02.403 Unspecified ptosis of bilateral eyelids
- H02.409 Unspecified ptosis of unspecified eyelid
- H02.421 Myogenic ptosis of right eyelid
- H02.422 Myogenic ptosis of left eyelid
- H02.423 Myogenic ptosis of bilateral eyelids
- H02.429 Myogenic ptosis of unspecified eyelid
- H02.431 Paralytic ptosis of right eyelid
- H02.432 Paralytic ptosis of left eyelid
- H02.433 Paralytic ptosis of bilateral eyelids
- H02.439 Paralytic ptosis unspecified eyelid
- H02.59 Other disorders affecting eyelid function
H05 Disorders of orbit16 codes
- H05.211 Displacement (lateral) of globe, right eye
- H05.212 Displacement (lateral) of globe, left eye
- H05.213 Displacement (lateral) of globe, bilateral
- H05.219 Displacement (lateral) of globe, unspecified eye
- H05.251 Intermittent exophthalmos, right eye
- H05.252 Intermittent exophthalmos, left eye
- H05.253 Intermittent exophthalmos, bilateral
- H05.259 Intermittent exophthalmos, unspecified eye
- H05.261 Pulsating exophthalmos, right eye
- H05.262 Pulsating exophthalmos, left eye
- H05.263 Pulsating exophthalmos, bilateral
- H05.269 Pulsating exophthalmos, unspecified eye
- H05.821 Myopathy of extraocular muscles, right orbit
- H05.822 Myopathy of extraocular muscles, left orbit
- H05.823 Myopathy of extraocular muscles, bilateral
- H05.829 Myopathy of extraocular muscles, unspecified orbit
H34 Retinal vascular occlusions37 codes
- H34.00 Transient retinal artery occlusion, unspecified eye
- H34.01 Transient retinal artery occlusion, right eye
- H34.02 Transient retinal artery occlusion, left eye
- H34.03 Transient retinal artery occlusion, bilateral
- H34.211 Partial retinal artery occlusion, right eye
- H34.212 Partial retinal artery occlusion, left eye
- H34.213 Partial retinal artery occlusion, bilateral
- H34.219 Partial retinal artery occlusion, unspecified eye
- H34.8110 Central retinal vein occlusion, right eye, with macular edema
- H34.8111 Central retinal vein occlusion, right eye, with retinal neovascularization
- H34.8112 Central retinal vein occlusion, right eye, stable
- H34.8120 Central retinal vein occlusion, left eye, with macular edema
- H34.8121 Central retinal vein occlusion, left eye, with retinal neovascularization
- H34.8122 Central retinal vein occlusion, left eye, stable
- H34.8130 Central retinal vein occlusion, bilateral, with macular edema
- H34.8131 Central retinal vein occlusion, bilateral, with retinal neovascularization
- H34.8132 Central retinal vein occlusion, bilateral, stable
- H34.8190 Central retinal vein occlusion, unspecified eye, with macular edema
- H34.8191 Central retinal vein occlusion, unspecified eye, with retinal neovascularization
- H34.8192 Central retinal vein occlusion, unspecified eye, stable
- H34.821 Venous engorgement, right eye
- H34.822 Venous engorgement, left eye
- H34.823 Venous engorgement, bilateral
- H34.829 Venous engorgement, unspecified eye
- H34.8310 Tributary (branch) retinal vein occlusion, right eye, with macular edema
- H34.8311 Tributary (branch) retinal vein occlusion, right eye, with retinal neovascularization
- H34.8312 Tributary (branch) retinal vein occlusion, right eye, stable
- H34.8320 Tributary (branch) retinal vein occlusion, left eye, with macular edema
- H34.8321 Tributary (branch) retinal vein occlusion, left eye, with retinal neovascularization
- H34.8322 Tributary (branch) retinal vein occlusion, left eye, stable
- H34.8330 Tributary (branch) retinal vein occlusion, bilateral, with macular edema
- H34.8331 Tributary (branch) retinal vein occlusion, bilateral, with retinal neovascularization
- H34.8332 Tributary (branch) retinal vein occlusion, bilateral, stable
- H34.8390 Tributary (branch) retinal vein occlusion, unspecified eye, with macular edema
- H34.8391 Tributary (branch) retinal vein occlusion, unspecified eye, with retinal neovascularization
- H34.8392 Tributary (branch) retinal vein occlusion, unspecified eye, stable
- H34.9 Unspecified retinal vascular occlusion
H40 Glaucoma20 codes
- H40.1210 Low-tension glaucoma, right eye, stage unspecified
- H40.1211 Low-tension glaucoma, right eye, mild stage
- H40.1212 Low-tension glaucoma, right eye, moderate stage
- H40.1213 Low-tension glaucoma, right eye, severe stage
- H40.1214 Low-tension glaucoma, right eye, indeterminate stage
- H40.1220 Low-tension glaucoma, left eye, stage unspecified
- H40.1221 Low-tension glaucoma, left eye, mild stage
- H40.1222 Low-tension glaucoma, left eye, moderate stage
- H40.1223 Low-tension glaucoma, left eye, severe stage
- H40.1224 Low-tension glaucoma, left eye, indeterminate stage
- H40.1230 Low-tension glaucoma, bilateral, stage unspecified
- H40.1231 Low-tension glaucoma, bilateral, mild stage
- H40.1232 Low-tension glaucoma, bilateral, moderate stage
- H40.1233 Low-tension glaucoma, bilateral, severe stage
- H40.1234 Low-tension glaucoma, bilateral, indeterminate stage
- H40.1290 Low-tension glaucoma, unspecified eye, stage unspecified
- H40.1291 Low-tension glaucoma, unspecified eye, mild stage
- H40.1292 Low-tension glaucoma, unspecified eye, moderate stage
- H40.1293 Low-tension glaucoma, unspecified eye, severe stage
- H40.1294 Low-tension glaucoma, unspecified eye, indeterminate stage
H46 Optic neuritis12 codes
- H46.00 Optic papillitis, unspecified eye
- H46.01 Optic papillitis, right eye
- H46.02 Optic papillitis, left eye
- H46.03 Optic papillitis, bilateral
- H46.10 Retrobulbar neuritis, unspecified eye
- H46.11 Retrobulbar neuritis, right eye
- H46.12 Retrobulbar neuritis, left eye
- H46.13 Retrobulbar neuritis, bilateral
- H46.2 Nutritional optic neuropathy
- H46.3 Toxic optic neuropathy
- H46.8 Other optic neuritis
- H46.9 Unspecified optic neuritis
H47 Other disorders of optic [2nd] nerve and visual pathways34 codes
- H47.011 Ischemic optic neuropathy, right eye
- H47.012 Ischemic optic neuropathy, left eye
- H47.013 Ischemic optic neuropathy, bilateral
- H47.019 Ischemic optic neuropathy, unspecified eye
- H47.021 Hemorrhage in optic nerve sheath, right eye
- H47.022 Hemorrhage in optic nerve sheath, left eye
- H47.023 Hemorrhage in optic nerve sheath, bilateral
- H47.029 Hemorrhage in optic nerve sheath, unspecified eye
- H47.031 Optic nerve hypoplasia, right eye
- H47.032 Optic nerve hypoplasia, left eye
- H47.033 Optic nerve hypoplasia, bilateral
- H47.039 Optic nerve hypoplasia, unspecified eye
- H47.091 Other disorders of optic nerve, not elsewhere classified, right eye
- H47.092 Other disorders of optic nerve, not elsewhere classified, left eye
- H47.093 Other disorders of optic nerve, not elsewhere classified, bilateral
- H47.099 Other disorders of optic nerve, not elsewhere classified, unspecified eye
- H47.20 Unspecified optic atrophy
- H47.211 Primary optic atrophy, right eye
- H47.212 Primary optic atrophy, left eye
- H47.213 Primary optic atrophy, bilateral
- H47.219 Primary optic atrophy, unspecified eye
- H47.22 Hereditary optic atrophy
- H47.291 Other optic atrophy, right eye
- H47.292 Other optic atrophy, left eye
- H47.293 Other optic atrophy, bilateral
- H47.299 Other optic atrophy, unspecified eye
- H47.321 Drusen of optic disc, right eye
- H47.322 Drusen of optic disc, left eye
- H47.323 Drusen of optic disc, bilateral
- H47.329 Drusen of optic disc, unspecified eye
- H47.331 Pseudopapilledema of optic disc, right eye
- H47.332 Pseudopapilledema of optic disc, left eye
- H47.333 Pseudopapilledema of optic disc, bilateral
- H47.339 Pseudopapilledema of optic disc, unspecified eye
H49 Paralytic strabismus25 codes
- H49.00 Third [oculomotor] nerve palsy, unspecified eye
- H49.01 Third [oculomotor] nerve palsy, right eye
- H49.02 Third [oculomotor] nerve palsy, left eye
- H49.03 Third [oculomotor] nerve palsy, bilateral
- H49.10 Fourth [trochlear] nerve palsy, unspecified eye
- H49.11 Fourth [trochlear] nerve palsy, right eye
- H49.12 Fourth [trochlear] nerve palsy, left eye
- H49.13 Fourth [trochlear] nerve palsy, bilateral
- H49.20 Sixth [abducent] nerve palsy, unspecified eye
- H49.21 Sixth [abducent] nerve palsy, right eye
- H49.22 Sixth [abducent] nerve palsy, left eye
- H49.23 Sixth [abducent] nerve palsy, bilateral
- H49.30 Total (external) ophthalmoplegia, unspecified eye
- H49.31 Total (external) ophthalmoplegia, right eye
- H49.32 Total (external) ophthalmoplegia, left eye
- H49.33 Total (external) ophthalmoplegia, bilateral
- H49.40 Progressive external ophthalmoplegia, unspecified eye
- H49.41 Progressive external ophthalmoplegia, right eye
- H49.42 Progressive external ophthalmoplegia, left eye
- H49.43 Progressive external ophthalmoplegia, bilateral
- H49.881 Other paralytic strabismus, right eye
- H49.882 Other paralytic strabismus, left eye
- H49.883 Other paralytic strabismus, bilateral
- H49.889 Other paralytic strabismus, unspecified eye
- H49.9 Unspecified paralytic strabismus
H50 Other strabismus1 code
- H50.89 Other specified strabismus
H51 Other disorders of binocular movement1 code
- H51.8 Other specified disorders of binocular movement
H52 Disorders of refraction and accommodation4 codes
H53 Visual disturbances31 codes
- H53.121 Transient visual loss, right eye
- H53.122 Transient visual loss, left eye
- H53.123 Transient visual loss, bilateral
- H53.129 Transient visual loss, unspecified eye
- H53.131 Sudden visual loss, right eye
- H53.132 Sudden visual loss, left eye
- H53.133 Sudden visual loss, bilateral
- H53.139 Sudden visual loss, unspecified eye
- H53.2 Diplopia
- H53.40 Unspecified visual field defects
- H53.411 Scotoma involving central area, right eye
- H53.412 Scotoma involving central area, left eye
- H53.413 Scotoma involving central area, bilateral
- H53.419 Scotoma involving central area, unspecified eye
- H53.431 Sector or arcuate defects, right eye
- H53.432 Sector or arcuate defects, left eye
- H53.433 Sector or arcuate defects, bilateral
- H53.439 Sector or arcuate defects, unspecified eye
- H53.451 Other localized visual field defect, right eye
- H53.452 Other localized visual field defect, left eye
- H53.453 Other localized visual field defect, bilateral
- H53.459 Other localized visual field defect, unspecified eye
- H53.461 Homonymous bilateral field defects, right side
- H53.462 Homonymous bilateral field defects, left side
- H53.469 Homonymous bilateral field defects, unspecified side
- H53.47 Heteronymous bilateral field defects
- H53.481 Generalized contraction of visual field, right eye
- H53.482 Generalized contraction of visual field, left eye
- H53.483 Generalized contraction of visual field, bilateral
- H53.489 Generalized contraction of visual field, unspecified eye
- H53.52 Acquired color vision deficiency
H55 Nystagmus and other irregular eye movements4 codes
H57 Other disorders of eye and adnexa9 codes
Z45 Encounter for adjustment and management of implanted device1 code
- Z45.31 Encounter for adjustment and management of implanted visual substitution device
ICD-10-PCS
Procedure Codes
Procedure codes do not drive assignment for this DRG. DRG 123 is a Medical DRG, assigned from the principal diagnosis above.
Frequently Asked Questions
What is MS-DRG 123?
MS-DRG 123 (Neurological Eye Disorders) is a medical DRG in MDC 02 (Diseases & Disorders of the Eye). Its FY 2026 relative weight is 0.7986 with a geometric mean length of stay of 2.1 days.
How many diagnosis codes group to DRG 123?
210 ICD-10-CM principal diagnosis codes group to this DRG, spanning 16 three-character categories.
What is the relative weight of DRG 123?
The FY 2026 relative weight of this DRG is 0.7986, meaning reimbursement of roughly 0.80 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.
← PreviousDRG 122 – Acute Major Eye Infections without CC/MCCNext →DRG 124 – Other Disorders of the Eye with MCC or Thrombolytic Agent
Source: CMS ICD-10 MS-DRG v43.0 Definitions Manual and the FY 2026 IPPS Final Rule (Table 5), effective October 1, 2025 through September 30, 2026. We publish the DRG assignments as CMS defines them and add the navigation, search, and code links.
