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H16.229 vs M35.01

H16.229 (Keratoconjunctivitis sicca, not specified as Sjögren's, unspecified eye) compared with M35.01 (Sjögren syndrome with keratoconjunctivitis), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.

Relationship

Conflict

Excludes1 conflict

H16.229
Keratoconjunctivitis sicca, not specified as Sjögren's, unspecified eye
↔
M35.01
Sjögren syndrome with keratoconjunctivitis

Not coded here — these two are mutually exclusive.

“Sjögren's syndrome (M35.01)”

An Excludes1 note means the two conditions cannot occur together, so the pair should not be reported for the same encounter. The sole exception is when the conditions are documented as unrelated to each other.

Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a

Can these codes be reported together?

No — do not report together. H16.229 carries an Excludes1 note covering M35.01: “Sjögren's syndrome (M35.01)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Side by side

H16.229Keratoconjunctivitis sicca, not specified as Sjögren's, unspecified eyeM35.01Sjögren syndrome with keratoconjunctivitis
Billing statusBillableBillable
ClassificationH00-H59 — Diseases of the Eye and Adnexa (H00-H59)M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
DefinitionKeratoconjunctivitis sicca, not specified as Sjögren's, unspecified eye is a billable ICD-10-CM diagnosis code (H16.229).Sjögren syndrome with keratoconjunctivitis is a billable ICD-10-CM diagnosis code (M35.01).
Includes—
autoimmune disease NOS
collagen (vascular) disease NOS
systemic autoimmune disease
systemic collagen (vascular) disease
Use additional code—
code to identify associated manifestations
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources