ICD-10-CM 2027
ICD-10 code for vision test
From the official ICD-10-CM alphabetic index entry “Test, tests, testing (for) › vision”. Page updated September 29, 2026.
About coding vision test
The ICD-10-CM code for vision test is Z01.00 (Encounter for examination of eyes and vision without abnormal findings). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Z01.00.
Within Z01.0, choose Z01.00 (without abnormal findings) only when documentation doesn't support a more specific option: with abnormal findings (Z01.01) and following failed vision screening (Z01.02).
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 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific vision test codes (official index)
- with abnormal findings Z01.01 — Encounter for examination of eyes and vision with abnormal findings
- following failed vision screening Z01.020 — Encounter for examination of eyes and vision following failed vision screening without abnormal findings
- with abnormal findings Z01.021 — Encounter for examination of eyes and vision following failed vision screening with abnormal findings
- infant or child (over 28 days old) Z00.129 — Encounter for routine child health examination without abnormal findings
- with abnormal findings Z00.121 — Encounter for routine child health examination with abnormal findings
Common questions about vision test ICD-10 codes
What is the ICD-10 code for vision test?
- Z01.00 — Encounter for examination of eyes and vision without abnormal findings. More specific codes apply when the documentation supports them: Z01.01, Z01.020, Z01.021, Z00.129 and others below.
What is the ICD-10 code for infant or child vision test?
- Z00.129 — Encounter for routine child health examination without abnormal findings.
Is Z01.00 billable?
- Yes. Z01.00 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z01.00 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Z01.00 as a principal diagnosis.
Is Z01.00 a CC or MCC?
- No. Z01.00 is neither a CC nor an MCC under MS-DRG v44.0.