Medical Billing and Coding in California: How to Stay Compliant with State Laws

In California, healthcare providers often struggle with medical billing and coding complexities, which result in costly claim denials, delayed reimbursements, and challenges. With over 955,900 healthcare professionals in the state, managing these complex processes can be overwhelming. Experian reports state that 38% of survey respondents face at least one in ten claims being denied, with some practices experiencing denial rates above 15%. Such issues can have a major impact on your practice’s revenue cycle and overall efficiency. Partnering with a reliable medical billing & coding company can help you improve your practice’s revenue and overall financial health.
Why Is Medical Billing And Coding Important?
Medical billing and coding are crucial for ensuring accurate reimbursement for healthcare services. They help maintain compliance with regulations, improve efficiency in processing claims, and ensure proper documentation of patient records. Accurate coding also prevents fraud and provides valuable data for healthcare research. Overall, they are essential for smooth healthcare operations and better patient care.
Medical Billing And Coding Challenges In California

Medical billing & coding in California come with a unique set of challenges due to the complex healthcare environment of the state. Here are the key challenges faced by healthcare professionals and providers.
Frequent Claim Denials:
In California, claim denials are often caused by inaccurate coding, missing documentation, or improper use of modifiers. These errors delay reimbursement and increase administrative costs, making it essential to ensure accuracy in the billing process.
Out-of-Network Billing:
Out-of-network billing is a significant issue, especially in emergencies. Even if a patient is treated at an in-network facility, they may receive services from out-of-network providers, leading to unexpected out-of-pocket costs. Despite federal protections like the No Surprises Act, many California patients still face surprise medical bills.
Constantly Changing Regulations:
California has its own set of state-specific regulations in addition to federal guidelines, and these regulations are frequently updated. For example, changes in the California Official Medical Fee Schedule (OMFS) and updates to Medicare Advantage rules require medical billing professionals to stay vigilant and adapt quickly to avoid compliance issues.
Medi-Cal Billing Complexities:
California’s Medi-Cal program (the state’s Medicaid) has specific rules for eligibility, reimbursement rates, and claim submission. With frequent policy changes, staying updated is crucial for providers to ensure that claims are processed correctly and reimbursements are received promptly.
Improper Use of Modifiers:
Improper use or omission of modifiers is a leading cause of claim denials in California. Modifiers are essential for providing additional information about a service or procedure, and incorrect or missing modifiers can lead to delays in payments or even claim rejections.
Data Security and Compliance:
With the growing reliance on electronic health records (EHR), data security is a major concern in California. Healthcare providers must comply with strict regulations such as HIPAA to protect patient information and avoid costly security breaches or compliance penalties.
Aging Technology and Systems:
Many healthcare facilities in California continue to rely on outdated billing systems, which can create inefficiencies and lead to billing errors. These legacy systems may not always align with newer coding standards or EHR technologies, causing delays and inaccuracies in the claims process.
Compliance with State Laws
In California, compliance with state-specific healthcare laws is essential for accurate and lawful medical billing and coding. The state enforces strict regulations, including timely claim submissions, privacy protections under the CMIA Act, and rules against balance billing under laws like AB 72. Staying compliant not only prevents audits and penalties but also ensures smooth reimbursements and builds trust with patients and payers.
Timeline: Medi-Cal Claim Submission Process in California

Common Denial Reasons in California Medical Billing
Understanding the common reasons for claim denials is crucial for improving revenue cycle efficiency and reducing payment delays. In California, several recurring issues contribute to claim rejections across medical specialties, including chiropractic care. Below is a breakdown of the most common denial reasons:
Denial Reason | Percentage | Explanation |
---|---|---|
Inaccurate Coding (ICD/CPT/HCPCS) | 30% | Coding errors remain the top denial cause, often due to outdated code sets, mismatched diagnosis and procedure codes, or incorrect code selection. |
Missing or Incomplete Documentation | 18% | Claims lacking necessary clinical documentation, progress notes, or medical necessity support are often denied by payers. |
Eligibility Issues | 14% | Claims are denied when a patient’s insurance coverage is inactive, expired, or doesn’t cover the rendered service. |
Improper Use of Modifiers | 12% | Modifiers like 25, 59, or chiropractic-specific ones (e.g., AT) are frequently misused or omitted, leading to claim rejections. |
Timely Filing Violation | 10% | Submitting claims after the payer’s deadline results in automatic denials; different insurers have varying timeframes. |
Out-of-Network Provider Billing | 8% | Services provided by non-participating or out-of-network providers may be denied or reimbursed at lower rates. |
Non-Covered Services | 5% | Some procedures, especially wellness or maintenance care in chiropractic, may not be covered under a patient’s plan. |
Duplicate Claims | 3% | Claims resubmitted without proper justification or appeal notes are flagged as duplicates and denied. |
Tips for Effective Outsourcing in Medical Billing and Coding in California
Outsourcing medical billing and coding can boost efficiency and reduce costs. Here’s how to make it work:
- Choose a Compliant Partner: Ensure the outsourcing company understands California regulations (OMFS, Medi-Cal) and HIPAA compliance.
- Plan for a Smooth Transition: Ensure clear communication and system compatibility for a seamless shift to outsourcing.
- Set Clear Expectations: Define performance goals and KPIs to track progress and ensure quality service.
- Maintain Communication: Regular check-ins help address issues and keep everything on track.
- Invest in Technology: Ensure your partner uses up-to-date software to reduce errors and improve efficiency.
- Focus on Training: Ongoing training ensures your outsourcing partner stays current with coding updates and regulations.
- Monitor Claim Denials: Track denials and rejections to identify and fix recurring issues.
- Verify Cost vs. Benefit: Make sure the cost savings from outsourcing outweigh any service quality risks.
- Ensure Data Security: Confirm your partner follows HIPAA guidelines and uses secure data systems.
- Choose a Scalable Partner: Ensure the outsourcing company can adjust to your practice’s evolving needs.
Final Thought
The ever-changing claims submission processes, claim rejections, and administrative tasks can make managing billing and coding in the healthcare system in California seem daunting. Despite these challenges, providers can optimize earnings through appropriate resources. Support, knowledge, and the right tools enable crossing hurdles while using a balance of accuracy, compliance, and technology. Putting effort toward these elements helps improve patient care by freeing up time spent on errors or delays due to processes.
Call us today at (415) 508-6537 and learn how we can help your practice.