Medical Claim Submission Process: Steps, Codes, and Checklist

The successful submission of a claim in the medical industry begins way before the billing staff submits a claim form to any insurance payer. Proper patient data, verified insurance coverage, adequate documentation of the patients’ clinical records, and proper use of medical codes will assist medical institutions in submitting claims effectively. Nonetheless, slight mistakes with regard to provider identification numbers, format, and payer information may lead to claim denials and delayed payment of the claims.

What Is the Medical Claim Submission Process?

Medical claims submission entails the preparation, validation, and transmission of medical claims for processing to the insurer. Medical claims include data such as patient data, diagnostic codes, procedure codes, services rendered, and billing codes.

In most cases, medical claims are submitted electronically using clearinghouses or payer portals. The payer evaluates the accepted claims based on coverage, coding, contract, and payment criteria before making the payment.

It is worth noting that claims submission, payer acceptance, and claims approval are different steps. Payers may accept claims for processing but not make payment decisions yet.

How Does the Medical Claim Submission Process Work?

There are eight steps that are linked together when making a claim for billing in the medical field. The process is used to ensure that there are no gaps in the information.

1. Register the Patient and Verify Insurance Coverage

The front desk gathers patient demographics, insurance information, subscriber data, and policy number information.

Prior to the appointment, it is important that the team verify the following:

• Insurance coverage on the date of service.
• Patient and subscriber information.
• Insurance coverage options (primary/secondary).
• Network participation.
• Any referral or prior authorizations required.
• Applicable deductibles, copayments, and coinsurance.

Even if there is an active insurance policy, that does not mean that there will be coverage for all services. The billing team must look at the limitations of benefits and medical necessity where applicable.

Internal linking opportunity: Insurance eligibility check related to your service page.

2. Capture Charges and Review Clinical Documentation

Following the patient encounter, healthcare professionals will chart their findings, treatment, procedures, and decision making.

The billing department next converts the details of the encounter to billable charges.

As an illustration, a physician’s office will chart an established patient evaluation, a laboratory test, and an extra treatment in one single visit. It is up to the coders to identify what can be coded for based on the charts and whether there are any coding guidelines or payer rules that would allow for separate billing.

Incomplete documentation delays charge posting and creates coding queries.

3. Assign Accurate Medical Billing Codes

It is the job of medical coders to study the medical document and assign appropriate diagnosis and procedure codes.

Additionally, the necessary modifier, units, dates of services, and diagnosis-procedure relations are verified.

The code set to be used for FY 2027 will be ICD-10-CM for those encounters that fall between October 1, 2026, and September 30, 2027. Coders need to use the appropriate code set corresponding to the date of service and not just the updated codes.

4. Generate and Scrub the Claim

The billing process organizes information related to patients, providers, insurance plans, diagnoses, and procedures in the correct claim format.

Some of the issues that can be discovered through claim scrubbing include:

• Absence of the NPI.
• Incorrect or expired diagnostic codes.
• Mismatch in patient demographic information.
• Incorrect modifiers or units.
• Missing mandatory information in the claims.
• Possible duplicate services.

Automatic edit checks help ensure consistency, yet they cannot take place of clinical documentation verification.

5. Submit the Claim Electronically

The majority of healthcare claims are filed electronically using standardized ASC X12 837 transactions.

The claims can either be sent by the practice directly to the payer or via a clearinghouse. The clearinghouse ensures that the transactions meet the necessary requirements before forwarding them.

According to CMS, ASC X12N 837 Version 5010 is the electronic health care claim standard adopted under HIPAA.

6. Monitor Clearinghouse and Payer Acknowledgments

The submission of a claim does not mean that the insurer has accepted it.

Transmission reports, acknowledgments, and rejections should be analyzed by billing teams.

The clearinghouse can refuse to process the claim if the claim file has incomplete data. The claim can be refused even prior to the acceptance into the processing system by the insurer.

The staff must fix the error and resubmit the claim. They must ensure that the payer has received the resubmitted claim.

7. Track Claim Adjudication and Resolve Denials

Once the claim has been accepted by the payer, it is processed based on the eligibility, benefits, coding, coverage, and payment rules.

The payer may either approve the payment, deny the claim, or ask for more information.

The billing staff needs to look into the reason behind denial, review the supporting documentation, and check whether the claim needs an adjustment or not.

CMS also provides for electronic claim status inquiry using the 276 and 277 transactions.

Linking opportunity: Link claim denial management to your denial management service page.

8. Post Payments and Follow Up on Outstanding Balances

After the adjudication process is done by the payer, the billing team posts the payments made by the insurance company, contractual adjustments, and the patient responsibility.

Discrepancies in remittance advice are reconciled against the original claim by the billing team.

The accounts receivable team follows up on claims that are not paid or resolved fully.

This last step concludes the claim submission cycle.

Medical Claim Submission Codes and Claim Formats

Healthcare practices use different code sets and claim formats depending on the services they provide and the type of organization submitting the claim.

Code or format	Purpose
ICD-10-CM	Identifies diagnoses and medical conditions
CPT	Describes physician services and outpatient procedures
HCPCS Level II	Identifies applicable supplies, equipment, drugs, and other services
Modifiers	Communicate additional circumstances about a service
POS codes	Identify where a professional service occurred
837P / CMS-1500	Professional claim transactions and paper forms
837I / CMS-1450 (UB-04)	Institutional claim transactions and paper forms

CMS establishes standards for electronic claims and maintains relevant billing code information.

Professional vs. Institutional Claim Submission

Physician offices, outpatient specialties, and other non-institutional providers normally utilize the 837P electronic format.

Institutions like hospitals use the 837I format for institutional claims billing.

Despite the two formats having reimbursement data, they have different requirements in terms of claim fields.

Medical Claim Submission Time: How Long Does Processing Take?

The period from making a claim until it is paid is based on the payer’s requirement, how complete the claim is, how it is sent, and the adjudication conditions.

Under the CMS’s March 2026 Medicare policy guidelines, the billing staff is advised to check the payment status after at least the following number of days since the date of submission:

• 14 days for an electronically submitted Medicare claim;
• 29 days for a paper Medicare claim.

These are minimum payment periods for Medicare, not dates by which the payment will be made. According to the CMS, the Medicare Administrative Contractors have to pay interest on applicable clean claims unpaid after 30 days.

Check the Status of a Medicare Claim

What Is the Medical Claim Submission Deadline?

The Medicare fee-for-service claim is supposed to be received by the respective Medicare carrier within a period not exceeding one year from the date of service. The timely filing rules may vary for commercial insurers and Medicaid plans. Therefore, it is advisable that each practice creates a payer-by-payer tracking mechanism of timely filing deadlines.

Medicare Billing: CMS-1500 & 837P

Medical Claim Submission Errors to Avoid

Billing teams often encounter preventable errors that interrupt the submission cycle.

Submission error	Potential consequence	Preventive action
Incorrect patient demographics	Claim rejection	Verify registration details
Inactive coverage	Eligibility-related denial	Check benefits before the visit
Incorrect diagnosis code	Coding edits or denial	Review documentation and valid code sets
Missing modifier	Payment discrepancy or denial	Apply applicable coding rules
Incorrect payer ID	Routing failure	Maintain current payer configuration
Duplicate submission	Duplicate claim edits	Check claim history before resubmission
Missed filing deadline	Timely filing denial	Track deadlines by payer

Claim Rejection vs. Claim Denial

The above results call for different actions to be taken.

Claim rejection is where the clearinghouse or the payer rejects the claim because he cannot process it any further. An example of something that can result in claim rejection is an invalid subscriber ID.

Claim denial is where the payer processes the claim but denies it payment on grounds that the procedure does not fall under the patient’s insurance plan or it doesn’t meet the conditions set out by the payer’s coverage.

It is important that the billing department differentiates between these two results before taking the next action.

Medical Claim Submission Checklist for Healthcare Practices

A list of all important information to be checked before submitting a medical claim is provided below. The use of this checklist will help healthcare facilities to avoid unnecessary errors and maintain proper claim records.

• Patient information: Check patient’s full name, date of birth, insurance number, and subscriber information.
• Insurance information: Determine whether the insurance is active and verify its terms.
• Authorization: Make sure that authorization is needed for some of the services.
• Clinical documentation: Make sure that the service was performed according to the records of the provider.
• Validation of medical codes: Ensure proper codes from ICD-10-CM, CPT, HCPCS, modifier codes, and units are accurate and consistent.
• Confirmation of provider information: Verify the NPI number, billing information, location of the service, and taxonomy information.
• Claim scrubbing: Find any missing items and possible issues related to code.
• Submit and monitor claims: Send the claims electronically and verify the clearing house responses.
• Confirmation of payer’s acceptance of the claim: Verify that the claim has been received.

A Practical Example of a Claim Submission Problem

Think about a primary care physician who is filing an office visit for an established patient. The registration staff ensures that the patient has proper insurance, and the encoder chooses the right E/M code based on the documentation of the encounter.

But there happens to be an outdated subscriber ID number in the billing software. As a result, the insurance company automatically rejects the claim before even processing it.

The billing staff looks at the rejected claim, makes sure of the correct subscriber ID number, changes the claim, and resubmits it.

Here is the case which shows why more is required in order for the claims process to move smoothly.

How Can Providers Improve Claim Submission Accuracy?

Develop Claim Edit Rules by Payers

Each insurance carrier may have different administrative rules to follow. The billing manager must be able to create payer-specific profiles for claims formatting, authorization, deadlines, and transmission procedures.

Track First-Pass Acceptances and Rejections Individually

Keep track of the number of claims accepted at first-pass review and rejected either by the clearinghouse or the payer.

This will help in pinpointing operational inefficiencies.

Review of Aging Claims Should Be Consistent

Unpaid claims need to be organized according to the payer, age of the claim, balance owing, and status of the claims.

Claims nearing the timely filing period or appeals period should be prioritized in order to help employees attend to the urgent tasks and not treat all aging claims as one.

Electronic Attachments Are Here

CMS issued the Final Rule on the new standards for electronic healthcare claims attachments under the HIPAA law in March 2026.

The new rule became effective on May 26, 2026, and provided a 24-month compliance period.

Frequently Asked Questions

1. How do you submit your medical claims?

The steps include registration of the patients, verification of insurance details, documentation assessment, coding of the treatment, creation of the claims, claim scrubbing, submission of the claim, receipt of acknowledgement from the payers, adjudication, and payment tracking.

2. Define a clean claim in medical billing.

A clean claim comprises the information required by the payer for processing the claim without further investigation or seeking information outside. But a clean claim doesn’t necessarily mean that the claim will be approved by the payer.

3. Explain the difference between 837P and 837I?

Practices in healthcare use 837P for professional claims while using 837I for institutional claims.

4. Is it possible to file claims without a clearinghouse?

Yes. Providers can make use of a payer-arranged direct electronic filing process. This process should be in compliance with all payer requirements.

5. If claims get accepted by the payer, does it mean that the provider will receive payment?

No. Acceptance of claims signifies that the payer has received a claim for further processing. The decision about the payment will be made after the claim is processed.

6. What occurs when the practice files claims after the expiration of the filing deadline?

The payer can refuse claims due to their being filed after the deadline expires. Billers need to investigate the deadlines and exceptions set by each payer.

7. How can billing teams reduce claim submission rejections?

Teams have the ability to check patient data, provider identification information, code validation, stay up to date on payer configurations, run claim edits, and even receive electronic acknowledgment.

Conclusion

A good claim submission process is one where there is accurate registration at the front end, accurate coding, electronic claim verification, and regular payer follow up. Healthcare facilities that evaluate their processes will be able to discover any rejections that could have been avoided, ensure compliance with deadlines for filing claims and resolve claims problems to prevent cash flow disruptions.