Yes, this happens commonly in specialty practices. However, I have seen some (rare) payers that won't cover two E/M on the same day even if it is 2 different subspecialties if they have the same Tax ID or group NPI. It depends on the payer. If you are doing a bill audit for a claimant, I am assuming it's work comp? You would have to check your payer rule. I am also assuming it was probably a spine surgeon and a physiatrist that saw the person on the same date? If subspecialties are recognized it would depend on their credentialing but usually these two are different. One is orthopedic surgery of the spine and the other is pain management or interventional pain management.
Medicare info:
"B. Office/Outpatient E/M Visits Provided on Same Day for Unrelated Problems As for all other E/M services except where specifically noted, the Medicare Administrative Contractors (MACs) may not pay two E/M office visits billed by a physician (or physician of the same specialty from the same group practice) for the same beneficiary on the same day unless the physician documents that the visits were for unrelated problems in the office, off campus-outpatient hospital, or on campus-outpatient hospital setting which could not be provided during the same encounter (e.g., office visit for blood pressure medication eva..."