Medical billing and coding connect the care your practice documents with the claims it submits for payment. When those processes do not work together, staff spend more time correcting information, investigating denials, and following up on unpaid accounts.
Practice owners do not need to become coding specialists. They do need to understand who reviews documentation, how claims move through the system, and where unresolved issues go.
This guide explains the difference between billing and coding, followed by seven checks to help you review your practice’s workflow.
What Is Medical Billing and Coding?
Medical coding translates documented diagnoses, services, procedures, and supplies into standardized codes.
Medical billing uses those codes alongside patient, provider, insurance, and other required information to prepare claims and manage the payment process.
The two functions depend on each other, but they serve different purposes.
| Function | Main responsibility | Example |
|---|---|---|
| Medical coding | Represent documented care using appropriate codes | Reviewing a record to identify supported diagnosis and service codes |
| Medical billing | Prepare claims and manage payment activity | Submitting a claim, reviewing the response, and following up |
| Clinical documentation | Record the care provided and relevant clinical details | Completing and authenticating the encounter note |
CMS identifies several healthcare code sets, including ICD-10, CPT, and HCPCS. These systems support standardized reporting of diagnoses, services, procedures, and supplies. Review the CMS code sets overview. CMS
An accurate code alone does not guarantee payment. Coverage, authorization, enrollment, filing requirements, and other factors can affect a claim.
1. Start Medical Billing and Coding With Complete Documentation
The medical record is the foundation of coding review.
When information is missing or unclear, the team needs a defined way to ask the treating clinician for clarification. Staff should not guess a diagnosis or select a service simply because it is likely to receive payment.
What to check
Confirm that your workflow addresses:
- Missing or incomplete encounter notes.
- Required signatures and authentication.
- Unclear descriptions of services.
- Conflicting information in the record.
- Documentation awaiting clinician clarification.
Assign responsibility for resolving each issue. A list of incomplete notes will not help if nobody owns the follow-up.
A practical example
A clinician completes a visit, but the documentation does not clearly support the service selected for billing.
The reviewer sends a focused clarification request. Once the clinician responds, the appropriate team member reviews the record and determines the next step.
The goal is an accurate record and claim—not an automatic increase in the billed service level.
2. Keep Medical Billing and Coding References Current
Code sets and payer requirements change. A code saved in a template or billing shortcut may need review before staff continue using it.
For example, CMS lists ICD-10-CM updates effective October 1, 2026. This makes a review of diagnosis-code references timely for practices preparing claims during the current period. Check the official CMS ICD-10 resources. CMS
What to check
- Use the code set applicable to the service date and setting.
- Review changed, deleted, and newly available codes.
- Update frequently used templates and shortcuts.
- Check applicable payer guidance.
- Tell staff which resources to use when questions arise.
CMS explains that CPT identifies medical services and procedures, while HCPCS Level II includes products, supplies, and services not included in CPT. Read the CMS HCPCS overview. CMS
Avoid relying on an old spreadsheet as your only coding reference.
3. Connect Eligibility and Authorization to Claim Preparation
Coding review cannot resolve every coverage problem.
Your team also needs to know whether it has checked eligibility, reviewed service-specific benefits, and addressed authorization requirements where applicable.
What to check
Before claim submission, confirm that the relevant staff can locate:
- Insurance information for the service date.
- Eligibility verification results.
- Authorization details, where required.
- Approved dates, services, visits, or units.
- Unresolved coverage questions.
An eligibility response or authorization approval does not guarantee payment. Both still need to align with the actual service and other applicable requirements.
A practical example
A patient has approval for a series of treatments. Before preparing the next claim, the team checks whether the service date and treatment match the recorded approval.
If the details differ, staff investigate rather than submitting the claim without review.
CMT provides eligibility and benefits verification and prior authorization support for practices that need help with these workflows.
4. Give Claim Exceptions a Clear Owner
Medical billing and coding software can flag potential problems, but an alert needs a next action.
A claim may require review because of missing information, an inconsistent field, a potential duplicate, or an edit involving the selected codes.
What to check
Every exception queue should show:
- What needs review.
- Who owns the task.
- When the task was assigned.
- The next action.
- Any relevant deadline.
- How staff record the resolution.
Group issues so the right person handles them. Registration staff, coding reviewers, clinicians, and billing specialists may need to resolve different parts of the claim.
Do not change codes or modifiers solely to bypass an edit. Review the documented service and applicable requirements before making a correction.
For more workflow ideas, see 4 Automatons to Reduce Claim Denials in Your Practice.
5. Separate Rejections From Denials
Your medical billing and coding reports should distinguish claims that fail acceptance checks from claims denied after processing.
A rejection typically means a claim has not entered adjudication. A denial follows payer processing. The exact response determines what staff should do next.
What to check
When a response arrives, staff should:
- Read the actual response and reason.
- Confirm whether it applies to the entire claim or an individual service line.
- Investigate the underlying issue.
- Determine whether correction, additional information, or an appeal is appropriate.
- Record the action and follow-up date.
Avoid repeatedly resubmitting the same claim without resolving the reason.
Read our guide to claim rejections versus denials for a closer look at these workflows.
6. Review Medical Billing and Coding Results Together
A total collections figure does not explain where the process needs attention.
Review a small set of measures that connects documentation, claim preparation, payer responses, and follow-up.
| Measure | Question it helps answer |
|---|---|
| Documentation awaiting completion | Which encounters cannot move forward? |
| Time from encounter to claim submission | Where does preparation slow down? |
| First-pass acceptance | How often do claims pass the relevant acceptance checks? |
| Initial denial rate | How frequently do adjudicated claims receive an initial denial? |
| Recurring denial reasons | Which problems need investigation? |
| Unpaid claim aging | Which accounts need follow-up? |
Define each measure consistently. Keep claim-level and service-line measures separate so comparisons remain useful.
For example, an increase in coding-related denials may warrant a sample review. It does not automatically establish that every affected claim contains a coding error.
Our revenue cycle KPI guide explains additional measures practice owners can review.
7. Define Responsibilities Before Outsourcing
Outsourcing medical billing and coding works better when both parties understand the scope.
“Full-service billing” can mean different things. Ask exactly which tasks the provider handles and which remain with your practice.
Questions to ask
- Who reviews codes and documentation?
- Who sends clinician clarification requests?
- Who manages eligibility and authorization work?
- Who submits claims and reviews acceptance reports?
- Who handles denials and unpaid accounts?
- What reports will the practice receive?
- How will unresolved issues be escalated?
- What access and confidentiality arrangements apply?
Confirm qualifications appropriate to the work. Do not assume that a billing agreement automatically includes comprehensive coding audits or clinical documentation review.
CMT’s medical billing services checklist can help structure these discussions.
A Practical Medical Billing and Coding Checklist
Use this checklist for a focused review of your current process:
- Documentation supports the reported services.
- Staff use current, appropriate references.
- Eligibility and authorization issues reach the right team.
- Claim exceptions have an owner.
- Rejections and denials receive different workflows.
- Reports identify recurring problems.
- Internal and outsourced responsibilities are clear.
Start with one problem that appears repeatedly. Review a sample of affected claims, identify the cause, and test a specific change before applying it broadly.
How Capitol Medical Technologies Can Help
Capitol Medical Technologies supports practices with medical billing and revenue cycle management, eligibility verification, prior authorization, denial management, and accounts receivable follow-up.
If your medical billing and coding workflow includes unresolved documentation questions, recurring claim issues, or growing follow-up queues, begin with a review of responsibilities and available data.
Request a complimentary revenue review to discuss your practice’s workflow and support needs.
Frequently Asked Questions
What is the difference between medical billing and coding?
Coding represents documented care using standardized codes. Billing uses those codes and other required information to submit claims, review payment activity, and follow up.
Can correct coding prevent every denial?
No. Claims can encounter coverage, authorization, enrollment, filing, or other issues even when the codes accurately represent the documented care.
Does a small practice need separate billing and coding staff?
The appropriate arrangement depends on service complexity, workload, staff qualifications, and review needs. Define responsibilities clearly even when one person performs several functions.
Can software replace coding review?
Software can support checks and identify potential issues. Qualified staff still need to interpret documentation, investigate exceptions, and validate corrections.