Medical billing companies in Massachusetts and what to ask them

MassHealth ACOs, the MCO and referral discipline

Most MassHealth managed care members are attributed to an ACO, either an Accountable Care Partnership Plan paired with an insurer or a Primary Care ACO that bills through MassHealth directly. The rest are in the WellSense MCO or the Primary Care Clinician Plan, and the Tufts Health Together MCO left the market at the start of 2026, moving its members elsewhere. ACO coverage puts weight on primary care attribution and referrals, so a claim that is clean on coding can still deny for a referral nobody captured. We confirm the ACO, referral and authorization requirements at eligibility, before the visit, where the fix is cheap.

MassHealth enrollment and credentialing in Massachusetts

MassHealth provider enrollment runs through the Provider Online Service Center, with MassHealth working to a 30-day processing standard for a complete application. Joining an ACO or MCO network does not replace that step: federal rules require every managed care network provider to hold a MassHealth provider agreement, and each plan then credentials on its own timeline with its own application. The quirk that hurts new providers is the interaction with the 90-day filing limit. A physician who starts seeing MassHealth patients while the POSC application is pending has spent the entire window on the first month of visits before the number arrives, so we sequence the start date against the enrollment date rather than hoping retroactive effective dates will cover it.

Medicare Part B in Massachusetts is handled by National Government Services as the Jurisdiction K contractor through PECOS. Blue Cross Blue Shield of Massachusetts, Harvard Pilgrim and Tufts pull from CAQH ProView, and the Point32Health plans still credential separately. The Board of Registration in Medicine renews physician licenses on a two-year birthday cycle. Every one of those dates goes on one calendar per provider, and we report status by payer so you know what is outstanding.

Ninety days to file

MassHealth requires an initial claim within 90 days of the date of service, or within 90 days of the primary insurer's explanation of benefits when MassHealth is secondary. Nothing else on this page matters if that date passes. We work MassHealth denials first each week, calendar every held claim, and prepare a 90-day waiver request when the delay fits one of the reasons MassHealth accepts, such as retroactive eligibility or a third-party payer's late response.

Regional commercial payers

Blue Cross Blue Shield of Massachusetts remains the largest single payer. Harvard Pilgrim and Tufts Health Plan sit under Point32Health but keep separate products, portals and provider files, and a practice loaded with one is not loaded with the other. Mass General Brigham Health Plan and Fallon Health carry more of the panel in specific regions. Each is configured as its own payer with its own edits and appeal routes, because their denials are specific and their appeal windows are their own. We also reconcile every payment line by line against the contracted rate, since a small underpayment repeated across a year of Blue Cross claims is worth more than most denial backlogs.

Prompt pay and surprise billing in Massachusetts

Under Chapter 176O, a state-regulated carrier must pay, deny with a written reason or request more information within 45 days of receiving a claim, and it owes interest on claims that sit past that date. Self-funded employer plans are exempt, so we tag every payer before follow-up. Massachusetts has no comprehensive state surprise billing statute for physicians; the federal No Surprises Act governs out-of-network emergency and facility-based claims, and the state's Patients First Act adds notice duties about network status and price that the front desk has to meet before the visit.

Workers' compensation under the DIA

Massachusetts workers' compensation is overseen by the Department of Industrial Accidents, and physician services are paid under the rates in 114.3 CMR 40.00 unless the insurer and provider agree otherwise in writing. Bills go to the employer's insurer with the claim number and the treating physician on file, and utilization review runs through the DIA's vendors. We confirm the insurer and authorization before the visit and reconcile the payment against the regulation rates.

ConnectorCare, Health Safety Net and the coverage edge

ConnectorCare plans sold through the Massachusetts Health Connector are subsidized commercial products with their own carriers and cost sharing, not MassHealth. The Health Safety Net pays for eligible low-income patients at acute hospitals and community health centers as a payer of last resort, under its own claim rules. We identify the program at eligibility before each visit, route ConnectorCare claims to the carrier that issued the plan, and record the MassHealth ACO on the date of service so referral rules are applied to the right plan.

Boston, Worcester and Springfield groups

A group with sites in Boston, Worcester and Springfield is billing different contract sets, often under more than one tax ID. We configure payers per site and report collections per location, so an underpaying contract at one office does not hide in the group total. Ask any company you are comparing for that report; a free billing audit is how we show you ours.

MassHealth

Most MassHealth managed care members are attributed to an ACO, which carries the referral and authorization expectations, with the remainder in the WellSense MCO or the PCC Plan. Which one a patient belongs to on the date of service determines how the claim must be handled, and MassHealth gives 90 days to file it.