Service areas
Medical billing support shaped by the state and payer market.
OneSource supports outpatient practices nationwide from Baltimore County, Maryland. Choose a state or regional market to see the enrollment programs, payer relationships, and practice situations that commonly affect revenue work there.
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State-specific billing and enrollment guidance
Start with the state program and payer environment that applies to your practice, then connect it to your specialty, systems, locations, and service mix.
California
PAVE availability and requirements are provider-type specific. Managed-care contracting remains separate from fee-for-service enrollment.
Review California guidanceColorado
Colorado requirements depend on provider type, specialty, enrollment role, and service location. RAE and managed-network participation may be additional.
Review Colorado guidanceFlorida
Florida distinguishes full, limited, and ROPA enrollment. Managed-plan participation is separate from AHCA enrollment.
Review Florida guidanceIdaho
Idaho medical, dental, behavioral-health, and coordinated-plan enrollment routes are not interchangeable.
Review Idaho guidanceIllinois
Illinois enrollment starts with the correct IMPACT enrollment type and its NPI, taxonomy, ownership, licensing, W-9, and screening requirements.
Review Illinois guidanceIndiana
IHCP enrollment varies for billing, rendering, group, ordering/referring, atypical, location, ownership, and affiliation work. Managed-care enrollment remains separate.
Review Indiana guidanceIowa
Iowa Medicaid enrollment requires the correct entity/individual section and supporting agreement, payment, tax, contact, screening, and provider-type material. Iowa Health Link plan work follows separately.
Review Iowa guidanceMaryland
Maryland is moving provider enrollment from ePREP to MPRIME in staged 2026 waves. The live transition milestone must be checked before treating an application path as available.
Review Maryland guidanceMassachusetts
MassHealth routes differ for fee-for-service, LTSS, dental, ordering/referring, QMB-only, and primary-care participation.
Review Massachusetts guidanceMichigan
Michigan providers use CHAMPS for screening and enrollment. High-acuity behavioral-health services may involve separate regional PIHP or CMH pathways.
Review Michigan guidanceMontana
Montana enrollment depends on individual or organization subtype, taxonomy, affiliations, and service locations reflected in MPATH and billing.
Review Montana guidanceNew York
New York enrollment and reinstatement use the Provider Services Portal. Electronic billing certification and ETIN readiness are separate post-enrollment requirements.
Review New York guidanceNorth Carolina
NCTracks handles electronic enrollment and supporting documents. Health-plan contracting and delegated credentialing remain additional work.
Review North Carolina guidanceOhio
Ohio enrollment requirements vary by provider type, screening risk, ownership, service location, and program prerequisites.
Review Ohio guidanceOregon
Oregon enrollment distinguishes payable and non-payable provider roles and requires current OHA forms. CCO contracting and credentialing are separate.
Review Oregon guidancePennsylvania
PROMISe supports enrollment, reactivation, and status work. State approval does not establish participation in a HealthChoices MCO network.
Review Pennsylvania guidanceUtah
Utah-ID and multifactor access precede PRISM enrollment. Incomplete online applications are time-sensitive and may be purged.
Review Utah guidanceVermont
Vermont distinguishes full billing, non-billing ordering/prescribing/referring, and Medicare-crossover-only enrollment paths.
Review Vermont guidanceVirginia
Virginia uses PRSS for enrollment and revalidation. Fee-for-service enrollment does not replace separate MCO contracting or credentialing.
Review Virginia guidanceWashington
Apple Health distinguishes billing and servicing enrollment. Managed-care participation and conditional roster processes require separate review.
Review Washington guidance
City and regional practice markets
These regional guides bring local payer mix and state enrollment requirements into the same conversation as billing, configuration, and follow-up.
Baltimore, MD
Baltimore-area practices often combine CareFirst products, Maryland Medicaid pathways, national commercial plans, and multi-jurisdiction telehealth. The 2026 ePREP-to-MPRIME transition makes current enrollment evidence especially important.
Learn moreRichmond, VA
Richmond practices need a clean distinction between Virginia PRSS enrollment, individual MCO participation, rendering-provider setup, and the EHR records used to submit claims.
Learn morePhiladelphia, PA
Philadelphia-area revenue work can span PROMISe enrollment, HealthChoices participation, regional Blue plans, national commercial products, and location-specific effective dates.
Learn moreNew York City, NY
New York City practices frequently need eMedNY enrollment, ETIN and electronic-billing readiness, plan-specific participation, and multi-location records to agree before claims behave predictably.
Learn moreBoston, MA
Boston-area practices need to classify the MassHealth program and provider role before treating portal access, service-location setup, and managed-plan participation as one task.
Learn moreCharlotte, NC
Charlotte practices often need NCTracks enrollment, health-plan contracting, delegated credentialing, and rendering-provider configuration tracked as separate workstreams.
Learn moreMiami, FL
South Florida practices can face different AHCA enrollment roles, dense SMMC plan mixes, in-state location requirements, and payer-specific authorization or contracting paths.
Learn moreDetroit, MI
Detroit practices may need CHAMPS enrollment, Medicaid health-plan participation, and PIHP or CMH behavioral-health pathways separated before billing and authorization ownership is clear.
Learn moreChicago, IL
Chicago practices need the correct IMPACT enrollment type, Illinois Medicaid MCO participation, regional plan routing, and service-location setup to stay aligned.
Learn moreSeattle, WA
Seattle practices often need Apple Health billing and servicing roles, MCO participation, roster rules, and telehealth or service-location configuration handled without collapsing them into one status.
Learn moreLos Angeles, CA
Los Angeles practices need provider-type-specific PAVE enrollment, Medi-Cal managed-plan participation, service-location details, and specialty-specific authorization paths to agree.
Learn moreDenver, CO
Denver practices may need Health First Colorado enrollment, regional accountable-entity or plan participation, provider-role setup, and commercial network records coordinated across locations.
Learn moreDes Moines, IA
Des Moines practices need the Iowa Medicaid entity and provider packet, Iowa Health Link plan participation, and billing-system affiliations tracked as connected but separate evidence.
Learn moreIndianapolis, IN
Indianapolis practices need the correct IHCP role and specialty, service-location and affiliation evidence, and separate participation across Indiana managed-care programs.
Learn morePortland, OR
Portland practices need OHP provider roles, current OHA forms, coordinated-care organization participation, and commercial network relationships separated by product and location.
Learn more
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