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Marinella Villanueva

@marinellavillanueva

I’m a senior medical coder focused on accurate ICD-10/CPT coding, HCC QA, and denials reduction through chart-driven reviews.

Zimbabwe
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What I'm looking for

I’m looking for a medical coding role where accuracy and productivity matter—coding ICD10/CPT with strong QA, reducing denials through chart review, and collaborating with providers to improve documentation and ensure CMS/Medicaid compliance.

I’m a medical coding professional with a long record of accurate, compliant coding across Emergency, outpatient, and ancillary services. I’ve assigned and audited ICD10 CM & CPT, and also work with ICD9 & HCPCS when needed to keep claims correct and complete.

At DCH Health System (ED, Clinics, Ancillary), I’ve been responsible for accurate ICD10 CM & CPT code assignment, including complex trauma cases, maintaining a coding accuracy rate of 96% and meeting or exceeding productivity benchmarks. I’ve also reduced coding-related denials/edits through productive review and corrections.

My experience extends into HCC QA work and coding optimization—assigning ICD10 codes for HCC diagnoses for outpatient and inpatient encounters and extracting diagnosis using processing software. I take pride in provider-facing education and compliance, including documentation guidance and adherence to coding rules for State Medicaid plans and CMS, using tools like EPIC and specialty encoder platforms.

Experience

Work history, roles, and key accomplishments

DS
Current

Medical Coder

DCH Health System

Jan 2014 - Present (12 years 4 months)

Assigned accurate ICD-10-CM and CPT codes for ED, clinic, and ancillary encounters, including complex trauma cases. Maintained a 96% coding accuracy rate, met/exceeded productivity benchmarks, and reduced coding-related denials and edits through timely review and corrections.

GH

Outpatient Coder

Garden Grove Hospital

Jan 2013 - Jan 2014 (1 year)

Assigned ICD-9 codes and procedures for emergency and outpatient encounters, including E&M with I&I, HCPCS, ancillary labs/radiology, OBS perinatal, wound care, and same-day surgery. Resolved denials/claims and NCCI edits and communicated with providers for missing documentation.

AI

ED & Ancillary Coder

Accurate Coding Services Inc.

Jan 2012 - Jan 2013 (1 year)

Assigned ICD-9 and CPT codes for emergency, ancillary, and radiology accounts supporting Mission Hospital workflows.

KP

Coder, Auditor, QA

Kaiser Permanente

Jan 2008 - Jan 2013 (5 years)

Assigned and audited ICD-9, CPT, and HCPCS codes across multiple specialties (e.g., gastroenterology, family medicine, urology, cardiology, OB, and surgery) using EPIC and computerized patient records. Extracted HCC diagnoses using clinical NLP software, educated providers on proper documentation, and ensured compliance with coding rules for Medicaid state programs and CMS.

Education

Degrees, certifications, and relevant coursework

HJ

Hope of St James

Certification, Medical Coding

Completed a certification for medical coding at Hope of St James.

LS

La Puente Adult School

Certification, Medical Billing & Coding

Completed a certification for medical billing and coding at La Puente Adult School.

PN

Preferred College of Nursing

Certification, Nursing Assistant & Home Health Aide

Completed training/certification for nursing assistant and home health aide at Preferred College of Nursing.

PH

Philippines

Bachelor of Science, Foreign Service

Earned a Bachelor of Science in Foreign Service in the Philippines.

Tech stack

Software and tools used professionally

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