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Medical billing specialist

Marathon Health Inc

Marathon Health Inc

India · Remote
USD 21-28 / hour
Posted on Jan 23, 2026

Marathon Health is a leading provider of advanced primary care in the U.S., serving 2.5 million eligible patients through approximately 630 employer and union-sponsored clients. Our comprehensive services include advanced primary care, mental health, occupational health, musculoskeletal, and pharmacy services, delivered through our 680+ health centers across 41 states. We also offer virtual primary care and mental health services accessible in all 50 states. Transforming healthcare delivery with a patient-first approach, we prioritize convenient access to both in-person and virtual care, resulting in improved health outcomes and significant cost savings. Committed to inclusivity and collaboration, we foster a positive work environment and recruit exceptional talent to ensure expertise and compassion in healthcare delivery. Marathon has been recognized as a five-time Modern Healthcare Best Places to Work in Healthcare winner and a six-time Best in KLAS award winner for employer-sponsored healthcare services.

ABOUT THE JOB

The medical biller is experienced, proactive and a valued member of our Revenue Cycle team. This individual is proficient with Athena EMR, exhibits excellent analytical capabilities, and must be adept at identifying billing challenges while proposing effective resolutions. This position plays a vital role in supporting the accurate and prompt submission of claims, posting of remittances, and resolution of billing discrepancies.

ESSENTIAL DUTIES & RESPONSIBILITIES

  • Review and submit medical claims to insurance companies via Athena EMR in worklists.
  • Monitor claim status and follow up on problematic claims.
  • Identify billing errors, trends, and root causes; propose corrective actions to improve processes.
  • Communicate with patients, providers, and insurance companies to resolve billing inquiries.
  • Maintain compliance with all federal, state, and payer-specific regulations.
  • Collaborate with internal teams to optimize revenue cycle workflows and reduce claim rejections and hold times.
  • Generate and analyze billing reports to track claim processing and identify opportunities for improvement.
  • Resolve unpostables in Athena and other correspondences.

QUALIFICATIONS

High school diploma and a minimum of 2 years medical billing experience in a healthcare setting or equivalent combination of education and experience. Proficiency with Athena EMR and knowledge of CPT and ICD-10 coding.

DESIRED ATTRIBUTES

  • Strong analytical and problem-solving skills with a proactive mindset.
  • Excellent communication and organizational skills.
  • Knowledge of medical terminology and insurance guidelines.
  • Knowledge of Athena reporting.
  • A strong knowledge of Athena global rules.
  • Experience in fast-growing healthcare settings.
  • Skilled at updating Athena tables (payer enrollment, credentialing, fee schedules).
  • Proficient in medical billing across multiple service types (primary care, behavioral health, physical therapy).
  • Advanced user of Excel pivot tables.
  • Ability to train clinical providers on RCM best practices.
  • Billing experience for onsite health centers.
  • Expertise with payer portals (Availity, Navinet).
  • Experience managing Athena unpostable.

Pay Range: $21.00-28.00/hr

The actual offer may vary dependent upon geographic location and the candidate’s years of experience and/or skill level.

We are accepting applications for this position until a candidate has been selected. To apply to this position and learn more about open jobs at Marathon Health, visit our careers page.