Medical Billing Assistant I/II

Kings-County; Hanford (CA); On-site; USD 41,000 - 55,000; Full time

Job summary

The Kings County Department of Public Health is seeking a Medical Billing Assistant I/II to manage accurate, timely billing for Medi-Cal, Medicare, and other health plans. You’ll support care delivery by keeping the financial engine running in a fast-paced environment.

This role offers growth from entry-level to advanced levels, requiring attention to detail and strong data-entry, coding, and payer communications with providers and insurers.

Qualifications

• Two years of experience in general accounting or financial data processing.
• Experience in a medical office setting preferred for I.
• Two years of experience at or above Medical Billing Assistant I level for II.
• California driver's license required.
• Ability to qualify for security clearance.

Responsibilities

• Review and submit medical claims to Medi-Cal, Medicare, and other plans.
• Verify documentation, authorization, and data for billing.
• Apply medical codes and determine allowable charges.
• Reconcile payments and post to patient accounts.
• Respond to provider and insurer inquiries about claims.
• Enter data into electronic billing software accurately.
• Produce reports on billing activities and denial statistics.
• Train junior staff and participate in meetings.

Education

High school diploma or equivalent

Job description

The Kings County Department of Public Health is currently seeking qualified individuals for the position of:

MEDICAL BILLING ASSISTANT I/II

I: $40,934.40 - $49,961.60 Annually

II: $45,219.20 - $55,182.40 Annually

The Kings County Department of Public Health is hiring for a Medical Billing Assistant I/II to power the fast-moving work behind our essential community services. In this dynamic role, you’ll help drive accurate, timely billing for Medi-Cal, Medicare, and other health plans by ensuring our teams can focus on delivering care while you keep the financial engine running. It’s a great fit for detail-driven problem-solvers who thrive in a busy environment and want to grow their skills in a mission-focused department. Whether you’re launching your billing career or stepping into a more advanced level, you’ll make a real impact from day one.

Management reserves the right to add, modify, change, or rescind the work assignments of different positions and to make reasonable accommodations so that qualified employees can perform the essential functions of the job. Some duties, knowledge, skills, and abilities may be performed in a learning capacity for entry-level (I Level) positions.

• Reviews and submits medical claims on behalf of the County for payment from Medi-Cal, Medicare, and other health care plans; reviews documents to verify completeness of claim, authorization for treatment and presence of required documentation, financial information, approvals and/or other needed data.
• Performs a detailed examination of all items billed to determine nature of procedure(s) included and eligibility for payment; reviews individual items on itemization reports to assess eligibility and amount shown for each item; disallows items as appropriate.
• Locates, interprets, and applies numerous complex and detailed medical codes, regulations, instructions and procedures to determine method to be used to calculate and/or re-determine amount allowed for each specific procedure/item.
• Reconciles individual items to specific categories; recognizes and extracts specific charges from grouping as billed for special handling and/or calculation at a different rate; and determines appropriate formula to be applied in each situation.
• Reviews medical chart notes, narratives and documents and extracts pertinent data such as medical information, Medi-Cal status, and authorizations for treatment to assist in determining appropriateness of charges and eligibility for payment.
• Uses the International Classification of Diseases to determine primary and secondary illness and treatment codes and records these codes and other statistical data on each claim processed.
• Responds to inquiries from medical providers and insurance companies; provides information on status of claims, proper claim procedures or general information; responds to inquiries concerning charges and payments; calls providers for clarification as needed.
• Performs mathematical calculations to determine amounts to be paid and verify accuracy of figures presented.
• Reviews records of patient/client visits to determine classifications of coverage to be billed such as private insurance, Medi-Cal/Medicare, governmental health insurance programs, laboratory services, and grant or other special funding sources; requests additional documents or documentation verbally or in writing to process claims, resubmits claim rejections or denials for reconsideration of payment, and follows-up on any unpaid claims.
• Prepares, verifies, and processes a wide variety of medical billing for services provided to patients/clients; performs accurate and timely data entry of codes and other information into electronic billing software programs.
• Performs reconciliation of remittances, post payments to patient/client accounts and research and resolve discrepancies.
• Provides information and assistance to other department support staff, supervisors and managers regarding medical coding and billing procedures in order to ensure accurate data is available for medical billing.
• Updates patient data and respond to inquiries from patients/clients, insurance companies, state or federal agencies, or health care facilities regarding status of patient accounts; combines and separates accounts to ensure proper pay classifications and correct statement billing; processes third-party pay forms, correspondence and bills; submits regular reports to supervisor concerning billing activities and statistics; perform special assignments such as compiling data on number and status of rejections or denials and other statistical data or reports; maintains accurate records of billing documents and documentation; may be assigned other clerical support or back-up duties as needed.
• Participates in regular meetings with supervisor, medical billing unit, and other department personnel.
• Provides training to less experienced staff and volunteers as assigned.
• Performs related duties as assigned.

Education

• Equivalent to completion of the twelfth (12th) grade.

Experience

• Medical Billing Assistant I: Two (2) years of experience in general accounting, bookkeeping, or processing of financial data, preferably in a medical office setting.

• Medical Billing Assistant II: Two (2) years of experience at a level equivalent to the classification of Medical Billing Assistant I with Kings County.

Licenses

• Possession of a valid California driver's license issued by the Department of Motor Vehicles at the time of appointment.

Special Requirements

Qualify for security clearance through a background investigation and fingerprint check.

All completed applications and supplemental questionnaires will be reviewed. Depending upon the number of applicants who meet the minimum qualifications, the examination process may include a screening committee (pass/fail) and/or written examination (pass/fail) and/or an oral examination (100%) which may include a written practical component to determine placement on the eligible list.

Note: Those applicants who are among the top 40 written test scores will be invited to participate in the oral examination process.

Veteran's Preference Available Upon Request

Veteran's Preference Application

You must submit a certified DD-214 and a new request form for each application submission prior to the closing date.

Tentative Recruitment Process

Final Date to Apply: November 5, 2026 at 5:00PM

HR Oral Examination: Week of November 23, 2026