Which Form Locator corresponds to the Optional field?

• A. Form Locator 50 - Payer Identification
• B. Form Locator 58 - Insured's Name
• C. Form Locator 59 - Patient's Relation to Insured
• D. Form Locator 57 - Other Providers ID - Optional

Answer: (D)

In UB-04, the field that is explicitly marked as optional is the one used to record an additional provider’s ID when another provider contributed to the claim. This field’s label is “Other Providers ID - Optional,” so it is the only locator that carries the term Optional and is used only when you have a second provider’s ID to report. If there isn’t another provider to report, you leave it blank.

The other options refer to fields that are typically required: Payer Identification identifies the payer, Insured’s Name identifies the insured, and Patient’s Relation to Insured determines eligibility and coverage. These are not optional, so they don’t carry the Optional designation.