Medicare reassignment and group enrollment: adding a provider to an existing practice.
Enrolling a physician as an individual and getting a group paid for that physician's work are two separate accomplishments, connected only by a correctly filed 855R. Practices that treat reassignment as a formality attached to hiring paperwork, rather than as its own filing with its own requirements, are the ones that discover a fully enrolled physician still can't be billed.
Key takeaways
- The 855R has to name every location where the reassignment applies — a location left off it is a location where claims deny.
- A physician splitting time across different tax IDs needs a separate 855R for each group, not one filing that covers both.
- Reassignment has to be formally terminated when a physician leaves — it doesn't lapse on its own just because they stopped showing up.
- The group's own 855B needs updating too whenever a new practice location opens, independent of any individual's paperwork.
What the 855R actually does
The 855R is a reassignment of benefits: it authorizes a group to receive Medicare payment on behalf of an individual practitioner who has separately enrolled with their own 855I. It is not a substitute for individual enrollment and it is not automatic once the individual is approved — it's a distinct filing, signed by both the individual (or their authorized delegate) and the group's Authorized Official, and it has to be current, accurate, and location-specific to actually function.
Because the 855R and 855I are commonly filed together in a single PECOS web session when hiring a new physician into an existing group, it's easy to assume reassignment is simply part of the individual enrollment rather than its own separate requirement. That assumption is exactly what causes a physician to show as fully enrolled in PECOS while the group's claims for that physician still deny — the 855I cleared, but the 855R was never actually filed, or was filed incompletely.
Multi-location practices: every service location has to be reflected
The 855R names specific practice locations where the reassignment applies. This is not a blanket statement that the group can bill for the physician everywhere the group operates — it is location-specific, and a location genuinely missing from the form is a location where that physician's claims will deny under the group, even while claims from the same physician at a location that was correctly listed process without issue. This inconsistency is confusing precisely because it looks like an intermittent problem when it's actually a straightforward gap in what was filed.
Practices expanding to a new office, or adding an existing physician to a location they didn't previously work from, need to update the 855R (or file a location addition through PECOS) before that physician starts seeing Medicare patients at the new address. Treat "which locations does this reassignment cover" as a question to actively verify against the physician's actual schedule, not an assumption to leave unchecked until a location-specific denial pattern surfaces.
| Scenario | What's required |
|---|---|
| Physician works at two offices, same group, same tax ID | One 855R listing both locations |
| Physician splits time between two groups with different tax IDs | A separate 855R filed against each group |
| Group opens a new office and moves an existing physician there | Update the 855R to add the new location before Medicare patients are seen there |
| Physician leaves the group entirely | Formal termination of the reassignment in PECOS, not simply removing them from the schedule |
Splitting time across locations tied to different group NPIs or tax IDs
A physician who works part-time for two genuinely separate organizations — different tax identification numbers, different Type 2 NPIs — needs a distinct 855R for each one. There is no single reassignment that covers both, because each 855R authorizes one specific receiving entity, and the individual's Medicare enrollment can support multiple concurrent reassignments as long as each is filed correctly and independently. This comes up often with physicians who split time between a hospital-employed role and an outside private practice, or between two unrelated group practices in the same market. Confirm at the time of hire exactly which tax ID the physician will bill under at each location, and file the corresponding 855R for each relationship rather than assuming one filing covers the physician's entire schedule.
Terminating a reassignment when a provider leaves
A reassignment does not expire automatically when a physician stops working at a practice. It has to be affirmatively terminated in PECOS, which is a step that's easy to overlook in the middle of an off-boarding process focused on more immediately visible tasks — returning equipment, deactivating EHR access, updating the website. An un-terminated reassignment left on file after a physician departs creates confusion during that group's next revalidation cycle, when the group has to account for every reassignment showing as active, and it can complicate the departing physician's ability to cleanly establish a new reassignment with their next employer if their enrollment record shows an unresolved prior relationship.
Build reassignment termination into the standard physician off-boarding checklist as its own line item, owned by whoever manages Medicare enrollment for the practice, with a target completion date tied to the physician's actual last day rather than left open-ended.
The group's own 855B obligations that get missed
Every new-hire or new-location project tends to focus entirely on the individual practitioner's paperwork — the 855I, the 855R, the license and malpractice documentation. What gets missed is that the group's own 855B enrollment has to independently reflect every practice location it operates from, and adding a physician to a new address doesn't automatically update the group's own enrollment record to include that address. These are two separate filings tracking two separate facts: where individual physicians are reassigned to bill, and where the group itself is enrolled as an operating entity.
A group's 855B falling out of date is the kind of gap that often doesn't surface immediately — claims may still process for a while — but it becomes a real problem at the group's next revalidation, or if a contractor conducts a site visit and finds an active location that isn't reflected in the group's own enrollment record. Whenever a new location opens, update the group's 855B and the affected physicians' 855Rs as two coordinated but distinct tasks, not one combined step.
Maintain a simple matrix of every enrolled physician against every practice location, marked with whether an active 855R covers that specific pairing. Cross-check it against the actual clinic schedule quarterly — this is the single fastest way to catch a location gap before it becomes a denial pattern.
Do and don't
- List every location where a physician actually sees patients on their 855R.
- File a separate 855R for each group with a different tax ID a physician bills under.
- Formally terminate a reassignment in PECOS as a standard off-boarding step.
- Update the group's own 855B whenever a new practice location opens.
- Don't assume one 855R covers a physician working across two different tax IDs.
- Don't move a physician to a new location before that location is added to their reassignment.
- Don't leave a departed physician's reassignment active on the theory that it doesn't matter anymore.
- Don't let the group's 855B fall out of date while individual paperwork gets all the attention.
Adding a provider to your practice?
We build the 855I and 855R together, verify every location is reflected correctly, and update your group's own 855B before it's ever an issue.
Frequently asked questions
Does one 855R cover a physician who works at two of our locations?
Yes, as long as both locations are part of the same group enrollment — the 855R has to list every practice location where the reassignment applies. A location left off the form is a location where claims for that physician will deny, even though the same physician bills cleanly at a location that was included. If the physician also works at a second practice with a different tax ID, that's a separate 855R against that second group entirely.
What happens to the reassignment when a physician leaves our group?
The reassignment doesn't end automatically just because the physician stops showing up — it has to be formally terminated in PECOS, generally by the group or the departing physician updating the enrollment record. Until that's done, the group's enrollment can still show an active reassignment for a physician who is no longer there, which creates confusion during any subsequent revalidation or contractor review, and can complicate that physician's ability to reassign benefits to a new group cleanly.
Do we need to update our group's own 855B when we open a new location?
Yes. The group's 855B has to reflect every practice location it operates from, independent of any individual practitioner's paperwork. This gets missed constantly because a new-location project tends to focus entirely on getting individual providers reassigned to the new address, while the group's own enrollment record quietly falls out of date in the background.
Confirm before you rely on this. Payer contact details, portal URLs, required documents and credentialing timelines change without notice, and payers periodically rename, merge or migrate their systems. The process information on this page reflects standard industry practice as of August 2026 and is provided for general education — verify current requirements directly with the payer before submitting an application.