PECOS reassignment missing
An 855I without the matching 855R leaves payment with nowhere to go and blocks Medicare Advantage participation.
Medicare Advantage
UnitedHealthcare Medicare Advantage credentialing
UnitedHealthcare carries the largest Medicare Advantage membership in the country, including the AARP-branded plans. We handle PECOS, the participation request, and the roster confirmation.
Overview
How UnitedHealthcare Medicare Advantage credentialing actually works
UnitedHealthcare's Medicare Advantage book — including the AARP-branded plans — is the largest in the United States, which makes it one of the highest-value contracts for practices serving seniors. Participation requires an active Medicare Part B enrollment in PECOS with a correct reassignment to the billing group.
UnitedHealthcare manages participation through its provider portal, and files stall most often on data consistency: NPI, TIN, taxonomy, and location have to match NPPES and PECOS. The portal will accept a mismatched submission and then hold it without a clear explanation.
Behavioral health, substance use, and ABA benefits are administered by Optum Behavioral Health across most UnitedHealthcare markets. Behavioral providers need the Optum file, and it is a separate queue from the medical network.
Plan footprint and product lines
- Medicare Advantage HMO, PPO, and PFFS plans nationwide
- AARP-branded Medicare Advantage and supplement products
- Dual Special Needs Plans (D-SNP) and chronic condition SNPs
- Optum Behavioral Health for behavioral, SUD, and ABA benefits
- UnitedHealthcare Provider Portal for submissions and roster updates
UnitedHealthcare Medicare Advantage enrollment requirements
- Active Medicare Part B enrollment in PECOS (CMS-855I / 855B) with a valid CMS-855R reassignment
- Group NPI and individual NPIs in NPPES with correct taxonomy codes
- TIN and legal entity name matching IRS records
- Complete, re-attested CAQH ProView profile authorized to the plan
- Current, unrestricted state license for each service state
- DEA registration with an address matching the practice location
- Board certification or an accepted education/training equivalency
- Malpractice coverage at or above the plan's minimum limits
- Clean NPDB, OIG, and SAM exclusion checks
- Executed participation agreement and fee schedule before the effective date
How the engagement runs
Week 1 — Medicare first
Medicare Advantage participation requires an active Medicare Part B enrollment (PECOS) with a correct reassignment. If PECOS is not clean, nothing downstream moves — we fix that first.
Week 1–2 — Application package
CAQH attested and authorized to the plan, licensure, DEA, board certification, malpractice, and the plan's participation request submitted with the correct group TIN and locations.
Week 4–12 — Credentialing committee
Primary source verification, then committee review on the plan's published cycle. We track the file weekly and answer every information request immediately.
Week 8–16 — Contract, load, verify
Contract and fee schedule executed, roster load confirmed, effective date captured, and the provider directory checked so patients can actually find the provider.
Common failure points
Why UnitedHealthcare Medicare Advantage applications stall or deny
These are the patterns we see most often when we take over a stalled file for this payer.
Behavioral file sent to UHC instead of Optum
Behavioral, SUD, and ABA credentialing runs through Optum. Filing with the medical network wastes the cycle.
Portal data mismatches
Taxonomy or address differences between NPPES, PECOS, and the request hold the file silently.
Roster load not confirmed
Execution is not activation. Claims deny until the provider is loaded and the directory reflects it.
Demographic changes not filed
A new location or TIN that is not filed breaks claims and directory listings within one cycle.
Assuming commercial UHC participation transfers
Medicare Advantage is a separate product line and generally requires its own agreement.
FAQ
UnitedHealthcare Medicare Advantage credentialing questions
Are AARP plans the same as UnitedHealthcare Medicare Advantage?
AARP-branded Medicare Advantage plans are administered by UnitedHealthcare, so participation flows through the UnitedHealthcare Medicare Advantage network.
Do I need PECOS before joining?
Yes. An active Medicare Part B enrollment with a valid reassignment is required before Medicare Advantage participation can be processed.
Who credentials behavioral health for UnitedHealthcare?
Optum Behavioral Health administers behavioral, substance use, and ABA benefits in most markets, and those providers credential with Optum.
How long does UHC Medicare Advantage credentialing take?
Typically 60 to 120 days from a complete submission, plus the roster load after the agreement is executed.
Does commercial UHC participation cover Medicare Advantage?
Not reliably. Medicare Advantage is generally a separate product line that must be confirmed on the agreement.
How often is re-credentialing required?
Every three years, with more frequent demographic and directory attestations.
Resources
Related guides
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