Certified Medical Coder - HCC & DRG (AAPC Certified)

About Martlet AI Martlet AI builds NLP and small language model (SLM) solutions for the Risk Adjustment ecosystem and HCC coding workflows. We're working at the intersection of clinical coding expertise and artificial intelligence, and we need coders who want to shape how AI learns to code, not just code charts. About the Role This is not a typical medical coding role. You won't be working a production coding queue. Instead, you'll be the clinical coding brain behind our AI systems reviewing charts to establish ground truth, building gold-standard datasets, and evaluating how well our models perform against expert human judgment. Your coding expertise will directly determine how accurate, defensible, and audit-ready our AI becomes. If you've ever looked at a coding tool and thought "I could make this smarter," this role is for you. What you'll do Perform expert-level chart reviews across HCC (risk adjustment) and DRG (inpatient) coding to establish ground-truth annotations for AI training and evaluationCreate, curate, and maintain gold-standard datasets used to benchmark model performanceEvaluate AI-generated coding output validating code capture, MEAT/TAMPER criteria, specificity, and supporting documentation and systematically log where models get it right and where they missConduct error analysis with our AI/ML team: categorize model failure patterns, explain the clinical coding rationale behind discrepancies, and help translate coding guidelines into rules and evaluation criteria the models can be measured againstStay current on ICD-10-CM guidelines, CMS-HCC model changes (including V28), and OIG/RADV audit trends, and ensure our datasets and evaluation standards reflect themDocument coding decisions and rationale clearly so they can be used by both auditors and engineersContribute to internal QA standards, annotation guidelines, and coder-AI workflow design What we're looking for Active AAPC certification required (CPC, CRC preferred; CIC/CCS a plus)5+ years of hands-on medical coding experience, with substantial time spent in HCC/risk adjustment coding; DRG/inpatient experience strongly preferredDeep working knowledge of ICD-10-CM Official Guidelines, CMS-HCC risk adjustment models, and MEAT criteriaExperience with chart audits, coding QA, or second-level reviewMeticulous attention to detail you catch the unsupported code, the missed specificity, the copy-forward problemAbility to articulate why a code is right or wrong in writing, clearly and consistentlyComfort working with spreadsheets, annotation tools, and structured data; curiosity about AI/NLP is a big plus (no engineering background required we'll teach you the AI side)Self-directed and comfortable in a fast-moving startup environment Nice to Have RADV audit or IVA experienceExperience creating training materials, coding guidelines, or annotation standardsPrior experience working alongside product or engineering teamsFamiliarity with CDI workflows Why join us Shape the future of AI in risk adjustment your expertise becomes the standard our models are measured againstEscape the production-queue grind: this role is about depth, judgment, and quality, not chart countsWork directly with the founding team at a focused, fast-growing AI companyGrow into an emerging career path: AI evaluation and clinical data quality is one of the fastest-growing specialties in health tech .