Medical billing errors can have a direct impact on a healthcare practice’s revenue, cash flow, and administrative workload. For Maryland medical practices, even small billing mistakes can result in claim rejections, denials, delayed payments, incorrect reimbursements, and increased accounts receivable (A/R).
As payer requirements, coding rules, documentation standards, and insurance policies continue to evolve, practices need a consistent billing process to minimize errors before claims are submitted.
This guide explores the most common medical billing errors Maryland practices should avoid and explains how professional billing support can help protect practice revenue.
1. Incorrect Patient Information
One of the most basic—and common—billing mistakes is entering incorrect patient information.
Errors may include:
- Misspelled patient names
- Incorrect date of birth
- Wrong member ID
- Incorrect group number
- Incorrect address
- Incorrect insurance information
- Missing demographic information
Even a minor discrepancy between the patient’s information and the insurance company’s records can cause a claim to be rejected.
Best practice: Verify patient demographics and insurance information before submitting claims.
2. Failing to Verify Insurance Eligibility
Assuming that a patient has active insurance coverage can create significant billing problems.
Insurance coverage may have:
- Expired
- Changed
- Different benefit limitations
- Deductibles or copayments
- Network restrictions
- Authorization requirements
If eligibility isn’t verified before the appointment, the practice may discover coverage problems only after the claim is submitted.
How to prevent it
Perform insurance eligibility verification before the patient’s appointment whenever possible and confirm:
- Coverage status
- Effective dates
- Copayment
- Deductible
- Coinsurance
- Out-of-pocket limits
- Provider network status
- Authorization requirements
3. Incorrect CPT or HCPCS Coding
Incorrect procedure coding can lead to claim denials, underpayments, or compliance concerns.
Common problems include:
- Selecting the wrong CPT code
- Using outdated codes
- Incorrect procedure levels
- Missing required modifiers
- Incorrect units
- Coding services that are not supported by documentation
Accurate coding should reflect the services actually provided and documented.
4. Incorrect ICD-10 Diagnosis Codes
Diagnosis coding supports medical necessity and helps explain why a service was performed.
Errors can occur when staff:
- Select the wrong diagnosis
- Use an unspecified code when a more specific code is appropriate
- Enter an incorrect diagnosis code
- Use outdated diagnosis codes
- Fail to link the diagnosis correctly to the procedure
These errors can contribute to claim denials and reimbursement delays.
5. Missing or Incorrect Modifiers
Modifiers provide additional information about how, where, or under what circumstances a service was performed.
Incorrect modifier usage can result in:
- Claim denials
- Incorrect reimbursement
- Bundling issues
- Payer edits
- Delayed payments
For practices performing multiple procedures or complex services, accurate modifier usage is particularly important.
6. Upcoding and Undercoding
Coding errors can happen in both directions.
Upcoding
Upcoding occurs when a higher-level service is reported than what the documentation supports.
This can create compliance risks and potential payer scrutiny.
Undercoding
Undercoding occurs when a lower-level service is reported than what was actually provided and documented.
This can cause the practice to receive less reimbursement than it may be entitled to.
The goal is not simply to maximize reimbursement—it is to submit accurate, compliant claims supported by proper documentation.
7. Missing Prior Authorization
Some procedures, medications, diagnostic services, and other healthcare services may require prior authorization depending on the patient’s insurance plan.
If authorization is required but not obtained, the claim may be denied.
Prevention strategies
Before providing services that may require authorization:
- Verify insurance coverage.
- Check payer requirements.
- Determine whether authorization is necessary.
- Obtain the required authorization.
- Document the authorization information.
- Include the appropriate information on the claim.
8. Filing Claims to the Wrong Payer
Patients may have multiple insurance plans, and determining the correct primary payer is important.
Submitting a claim to the wrong insurance company can cause:
- Rejections
- Delays
- Additional administrative work
- Incorrect patient balances
Practices should verify coordination of benefits and identify the appropriate primary and secondary insurance before claim submission.
9. Missing Timely Filing Deadlines
Insurance companies generally establish deadlines for submitting claims.
If a claim is submitted after the payer’s applicable deadline, the practice may face a timely filing denial.
This is why claims should be submitted as quickly as possible after services are provided.
A strong billing workflow should monitor:
- Date of service
- Claim submission date
- Payer-specific filing requirements
- Rejected claims
- Corrected claims
- Appeal deadlines
10. Duplicate Claim Submissions
Submitting the same claim more than once can create duplicate claim issues.
This may happen because of:
- System errors
- Poor claim tracking
- Re-submitting without checking claim status
- Communication problems between billing staff
Before resubmitting a claim, the billing team should determine whether the payer already received or processed the original submission.
11. Poor Documentation
Medical documentation plays an important role in supporting the services billed.
If documentation does not adequately support the billed service, the practice may encounter:
- Claim denials
- Medical necessity issues
- Coding problems
- Audit concerns
- Reduced reimbursement
Providers should ensure that documentation accurately reflects the services performed.
12. Incorrect Place of Service Codes
The place of service code communicates where a healthcare service was provided.
Using an incorrect POS code can affect claim processing and reimbursement.
Practices should ensure that the place of service reported on the claim accurately reflects where the service occurred.
13. Failing to Correct Rejected Claims Quickly
A rejected claim is not the same as a successfully processed claim.
If a claim is rejected because of missing or incorrect information, it should be reviewed and corrected promptly.
Leaving rejected claims unattended can result in:
- Delayed reimbursement
- Increased A/R
- Timely filing problems
- Additional administrative work
An effective billing workflow should have a system for monitoring and correcting rejected claims quickly.
14. Not Following Up on Unpaid Claims
Submitting a claim does not mean the billing process is finished.
Insurance companies may:
- Request additional information
- Delay processing
- Underpay claims
- Deny claims
- Require appeals
- Leave claims pending
Regular payer follow-up is essential for maintaining healthy A/R.
A practice should have a structured process for identifying and following up on outstanding claims based on their age and status.
15. Ignoring Underpayments
A claim can be processed and paid without being paid correctly.
For example, a payer may reimburse less than expected based on the applicable contract or fee schedule.
Without payment analysis, practices may overlook these discrepancies.
Underpayment review can help identify:
- Incorrect reimbursement
- Contractual discrepancies
- Missing payments
- Incorrect adjustments
- Payer processing issues
Identifying underpayments can be an important part of revenue recovery.
16. Incorrect Patient Billing
Patient statements should accurately reflect the patient’s financial responsibility.
Problems can occur when practices:
- Bill patients for amounts already paid by insurance
- Apply incorrect adjustments
- Miss secondary insurance
- Send incorrect balances
- Fail to post insurance payments properly
Accurate payment posting and patient balance management can reduce confusion and improve patient collections.
17. Incomplete Claim Information
Claims containing missing information are more likely to encounter processing problems.
Before submission, billing teams should review important fields such as:
- Patient information
- Provider information
- Insurance information
- Diagnosis codes
- Procedure codes
- Modifiers
- Units
- Place of service
- Authorization information
- Required claim identifiers
Automated claim-scrubbing tools can also help identify certain errors before submission.
How Can Maryland Practices Reduce Medical Billing Errors?
Reducing billing errors requires more than correcting claims after they are rejected. Practices should build preventive processes into the entire revenue cycle.
1. Verify Insurance Before Appointments
Confirm eligibility and benefits before services are provided.
2. Maintain Accurate Patient Information
Regularly update demographics and insurance information.
3. Strengthen Coding Processes
Use qualified coding professionals and conduct periodic coding reviews.
4. Use Claim Scrubbing
Identify common claim errors before submission.
5. Track Denials
Analyze denial patterns to determine recurring problems.
6. Monitor A/R
Review aging accounts regularly and establish appropriate follow-up schedules.
7. Train Staff
Keep billing and administrative staff informed about payer requirements and workflow changes.
8. Measure Billing Performance
Track metrics such as:
- Clean claim rate
- Denial rate
- Days in A/R
- Net collection rate
- Gross collection rate
- Payment turnaround
- A/R aging
These metrics can reveal where the revenue cycle needs improvement.
Why Professional Medical Billing Services Can Help
Managing billing internally can become difficult as a practice grows. Staff members may have to manage patient registration, eligibility, coding, claim submission, denials, payment posting, insurance follow-up, and A/R simultaneously.
Professional medical billing services can provide specialized support across these processes.
A dedicated billing team can help practices:
- Identify billing errors
- Improve claim accuracy
- Manage denied claims
- Follow up with insurance companies
- Monitor A/R
- Identify underpayments
- Improve revenue cycle efficiency
- Reduce administrative workload
The goal is not simply to submit more claims—it is to help ensure that accurate claims are submitted, tracked, corrected, and paid appropriately.
Final Thoughts
Medical billing errors can quietly reduce revenue while increasing administrative workload. From incorrect patient information and coding mistakes to eligibility problems, missing authorizations, timely filing issues, and poor A/R follow-up, every stage of the revenue cycle can create opportunities for errors.
For Maryland practices, developing a proactive billing process is essential for protecting cash flow and maintaining a healthy revenue cycle.
Medhasty provides medical billing, coding, denial management, A/R management, eligibility verification, credentialing, and revenue cycle management solutions designed to help healthcare practices improve billing accuracy and financial performance.
If your Maryland practice is experiencing claim denials, delayed payments, growing A/R, or billing errors, professional billing support can help identify the underlying problems and create a more efficient revenue cycle.
