PECOS
PECOS (Provider Enrollment, Chain, and Ownership System) is the online system CMS uses to manage Medicare provider and supplier enrollment. Home health agencies use PECOS to enroll, revalidate, and report changes such as ownership or new locations, and Medicare uses it to verify that the practitioner certifying home health services is eligible to do so. Claims can deny when the certifying practitioner is not properly enrolled.
What PECOS is and what it tracks
PECOS is the electronic front door for Medicare enrollment, replacing pure paper processing of the CMS-855 application series. A home health agency enrolls and maintains its record using the CMS-855A application, which captures the agency's legal identity, practice locations, ownership chain, managing employees, and authorized officials. PECOS also holds the enrollment records of individual practitioners. CMS and the Medicare Administrative Contractors (MACs) use this data to screen who is allowed to bill Medicare and who is allowed to order and certify services for Medicare patients.
Why certifying practitioner enrollment matters
Home health claims identify the certifying practitioner, and Medicare claim edits check that practitioner against PECOS. If the physician, nurse practitioner, physician assistant, or clinical nurse specialist who signed the certification is not enrolled in Medicare (or validly opted out) with an eligible specialty, the claim will deny. The fix is operational: verify the certifying practitioner's enrollment status at intake, before the start of care, rather than discovering the problem when the final claim rejects. Referrals from hospitalists, residents, or practitioners new to the area are the most common tripwires.
Keeping the agency's own record current
Agencies have ongoing reporting duties in PECOS. Changes in ownership or control and certain adverse actions generally must be reported within 30 days, and most other changes within 90 days. CMS also requires periodic revalidation, generally every five years for home health agencies, and can request off-cycle revalidation. Missing a revalidation deadline can lead to a hold on payments or deactivation of billing privileges, which stops cash entirely until the record is corrected. Someone in the organization should own PECOS accuracy the way someone owns payroll.
Common pitfalls
Recurring problems include accepting referrals without checking the certifying practitioner's enrollment, mismatches between the name or NPI on the claim and the PECOS record, stale ownership and managing employee data discovered during a change of ownership, and revalidation notices sent to an old address and never seen. Each is cheap to prevent and expensive to unwind after claims start denying.
Frequently asked questions
What happens if the certifying practitioner is not in PECOS?
Medicare's ordering and certifying edits will deny the home health claim. The agency either obtains a valid certification from an enrolled practitioner or absorbs the loss, so enrollment status should be verified at intake, before care begins.
How often does a home health agency revalidate its PECOS enrollment?
Generally every five years, though CMS can require off-cycle revalidation. Failing to respond to a revalidation request can result in deactivation of billing privileges, so revalidation due dates should be tracked like license renewals.
Is PECOS the same as NPPES?
No. NPPES is the system that issues National Provider Identifiers (NPIs), while PECOS handles Medicare enrollment and billing privileges. An NPI alone does not allow anyone to bill or certify for Medicare; the two records must exist and match.