Medical Billing Companies & Consultants in Ontario, CA

Quantix Health is a medical billing and revenue cycle management firm based in Ontario, California. It is the trade name of Quantix, Inc. Physicians founded the company, and it handles the business side of medicine for independent practices across Southern California. Its service area covers the Inland Empire, Riverside County, San Bernardino County, Orange County and Los Angeles County.

The team says it has more than two decades of combined experience in healthcare and revenue operations, and it describes its work as compliance-focused and HIPAA-conscious.

Core billing and revenue cycle work

Revenue cycle management is the firm's main offering. It covers the whole path from checking a patient's coverage to collecting the final payment. A single engagement includes:

• Checking insurance eligibility and benefits before appointments
• ICD-10, CPT and HCPCS coding by certified coders who know each specialty
• Corrective coding to catch errors and documentation gaps before claims are denied
• Daily claim submission with automated, AI-assisted scrubbing
• Working and appealing denied claims
• Follow-up on unpaid and aging receivables
• ERA and EOB payment posting, reconciled exactly
• Patient statements and polite follow-up on balances

Quantix looks for the root cause of each denial. Staff don't just resubmit a rejected claim. They find out why it was rejected and fix the step that caused it, so the same problem doesn't come back.

Clients get dashboards that track the first-pass clean-claim rate, denials by payer and reason, days in A/R, the share of receivables older than 90 days, net collection rate and how long each payer takes to pay. Each month they also get a review written in plain language.

Credentialing, staffing and consulting

Quantix also handles provider credentialing and enrollment with Medicare, Medi-Cal and commercial payers. This includes building and maintaining CAQH profiles and setting up group and individual enrollments and NPIs for new practices or locations. The team also confirms participation status and effective dates, and tracks revalidations as well as license and DEA expiration dates.

The firm supplies screened remote staff, including billers, coders and back-office support, who each work for one client practice. It also offers consulting on practice operations, finances and compliance. Optional add-ons include help with billing and coding audits, even for dates of service before or outside a Quantix engagement, written SOPs for front- and back-office workflows, and patient statement handling.

Specialties and onboarding

The company bills for many specialties, including cardiology, pediatrics, radiology, neurology, oncology, dermatology, orthopedics, internal medicine, endocrinology, podiatry, OB/GYN, pulmonology, rheumatology, behavioral health, and primary and family care. It also works with home health and hospice agencies, skilled nursing and intermediate care facilities, hospitalist groups, laboratories, physical therapy providers and community-based organizations. It supports value-based programs too, such as chronic care management, HCC risk adjustment, pay-for-performance and CHDP child health services.

Each engagement starts with a free review of the practice's billing, receivables and operations, followed by a plan built for that practice. Quantix says most clients finish switching over within a few weeks and usually keep their current EHR and practice-management software. During the switch, the team works old receivables alongside new claims so older balances aren't lost. Fees for RCM are usually a percentage of collections, and the firm says it avoids long-term lock-in.