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ICD-10-CM A50.30: Late congenital syphilitic oculopathy, unspecified

A50.30 is the billable ICD-10-CM code for late congenital syphilitic oculopathy, unspecified, in category A50 (Congenital syphilis) of the Infections with a predominantly sexual mode of transmission section. As a principal diagnosis it groups to MS-DRG 867 Other Infectious and Parasitic Diseases Diagnoses with MCC, MS-DRG 868 Other Infectious and Parasitic Diseases Diagnoses with CC, MS-DRG 869 Other Infectious and Parasitic Diseases Diagnoses without CC/MCC (MDC 18 MDC 18: Infectious and Parasitic Diseases, Systemic or Unspecified Sites). As a secondary diagnosis it is a CC, excluded with 79 principal diagnoses.

Compiled from CMS files by the QuickIntell RCM Editorial Team · Data effective · Method: reference methodology · Report a data correction

Data currency: ICD-10-CM code descriptions: FY2027 (effective October 1, 2026); IPPS Table 5 (MS-DRG weights): v44 FY2027 (final rule + CN3) (effective October 1, 2026); ICD-10-CM to HCC mapping: PY2027 initial ICD-10-CM mappings (dates of service 2026) (payment year 2027); Medicare Coverage Database billing and coding articles: MCD release October 8, 2026 (effective October 4, 2026). Next CMS release: FY2028 code files, effective October 1, 2027 for the ICD-10-CM code descriptions; FY2028 final rule (August 2027), effective October 1, 2027; an April 1 interim grouper update when CMS issues one for the IPPS Table 5 (MS-DRG weights); PY2028 advance notice (February 2027) and the PY2027 midyear final mapping (spring 2027) for the ICD-10-CM to HCC mapping; weekly, every Thursday for the Medicare Coverage Database billing and coding articles.

Code
A50.30
billable FY2027 ICD-10-CM code
Category
A50 Congenital syphilis
Chapter
1: Certain infectious and parasitic diseases (A00-B99)
CC/MCC (MS-DRG v44)
CC
CMS-HCC V28
Not mapped
POA reporting
Required

Tabular list notes for A50.30

The tabular list has no notes on A50.30 itself; the notes below apply from its parent headings.

Inherited from A50.3 (Late congenital syphilitic oculopathy)

Excludes1 (never coded together)
  • Hutchinson's triad (A50.53)

MS-DRG grouping when A50.30 is the principal diagnosis

MS-DRG v44 groups for A50.30 as principal diagnosis
MDCMS-DRGs
18 MDC 18: Infectious and Parasitic Diseases, Systemic or Unspecified Sites867868869

The final group also depends on procedures, secondary diagnoses and discharge status; the MS-DRG lookup for A50.30 shows the full grouping logic.

CC/MCC status and inpatient edits

As a secondary diagnosis, A50.30 is a CC under MS-DRG v44, unless the principal diagnosis is one of the 79 codes in its exclusion list. Check A50.30 against a principal diagnosis.

  • Present on admission: a POA indicator is required on inpatient claims.

CMS-HCC V28 risk adjustment

A50.30 does not map to a payment HCC in the PY2027 CMS-HCC V28 model, so on its own it does not change a Medicare Advantage risk score.

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Frequently asked questions

What does ICD-10-CM A50.30 mean?

A50.30 means late congenital syphilitic oculopathy, unspecified. It is one of 25 billable codes under A50, congenital syphilis.

What can't be coded with A50.30?

Excludes1 at A50.3: Hutchinson's triad (A50.53). These are never reported together with A50.30.

Which MS-DRG does A50.30 group to?

As the principal diagnosis, A50.30 groups to MS-DRG 867 Other Infectious and Parasitic Diseases Diagnoses with MCC, MS-DRG 868 Other Infectious and Parasitic Diseases Diagnoses with CC, MS-DRG 869 Other Infectious and Parasitic Diseases Diagnoses without CC/MCC (MDC 18 MDC 18: Infectious and Parasitic Diseases, Systemic or Unspecified Sites) under MS-DRG v44, before procedures and secondary diagnoses are applied.

Is A50.30 a CC or MCC?

A50.30 is a CC under MS-DRG v44; 79 principal diagnoses exclude it.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Disclaimer

The descriptor and notes are reproduced from the FY2027 ICD-10-CM files; MS-DRG, CC/MCC and HCC facts come from the CMS FY2027 and PY2027 tables. Code from the medical record and the ICD-10-CM Official Guidelines. Not legal, clinical or billing advice.

Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.