For tax purposes or when a provider needs to verify a company’s legal identity, they may use the company's . This is a nine-digit number used by the IRS to identify the business entity. How to Locate Your Company's ID
While this identifies you rather than the company, it is often what people mean when they ask for their "insurance ID".
If the number isn't clearly visible on your physical or digital ID card, you can try these methods:
This is the summary page of your policy that lists your coverage limits and premiums; the company code is almost always listed here.