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Dx

ICD-10-CM 2027

ICD-10 code for Wassermann test

Z11.3

Encounter for screening for infections with a predominantly sexual mode of transmission

✓ Billable / specificNot a principal dx

From the official ICD-10-CM alphabetic index entry “Test, tests, testing (for) › Wassermann”. Page updated September 29, 2026.

About coding Wassermann test

The ICD-10-CM code for Wassermann test is Z11.3 (Encounter for screening for infections with a predominantly sexual mode of transmission).

Within Z11 (encounter for screening for infectious and parasitic diseases), Z11.3 is specifically for encounter for screening for infections with a predominantly sexual mode of transmission. Related codes cover screening for intestinal infectious diseases (Z11.0), screening for respiratory tuberculosis (Z11.1), screening for other bacterial diseases (Z11.2), screening for human immunodeficiency virus [HIV] (Z11.4), screening for other viral diseases (Z11.5), screening for other protozoal diseases and helminthiases (Z11.6), testing for latent tuberculosis infection (Z11.7), screening for other infectious and parasitic diseases (Z11.8) and 1 more.

The conditions in its Excludes2 note aren't part of Z11.3, but may be coded alongside it if the patient has both: encounter for screening for human immunodeficiency virus [HIV] (Z11.4) and encounter for screening for human papillomavirus (Z11.51).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

More specific Wassermann test codes (official index)

  • positive

Common questions about Wassermann test ICD-10 codes

What is the ICD-10 code for Wassermann test?

Z11.3 — Encounter for screening for infections with a predominantly sexual mode of transmission.

Is Z11.3 billable?

Yes. Z11.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Z11.3 be used as a principal diagnosis?

No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.

Is Z11.3 a CC or MCC?

No. Z11.3 is neither a CC nor an MCC under MS-DRG v44.0.