Step 10: Submit your first claim

Turn a real patient visit into an 837D claim: benefit verification, CDT coding with tooth and surface data, attachments, a predetermination for the crown, and the acknowledgments that come back.

A claim is a structured request for payment sent by the billing provider to a payer. It identifies the patient, rendering provider, services, and dental anatomy. An electronic dental claim uses the X12 837D transaction. This step follows one visit from scheduling through claim acceptance.

What Bluebird did

Mrs. Alvarez, 46, booked as a new patient. The front desk verified eligibility two days before the visit and again at check-in: coverage active, $$1,500 annual maximum untouched, preventive covered at 100%, no waiting periods. Dr. Okafor did a comprehensive exam and radiographs, the hygienist a prophylaxis, and Dr. Okafor placed a one-surface composite on a lower molar and treatment-planned a crown on another. The biller entered charges that afternoon, the scrubber flagged a missing tooth surface on the composite line, the biller fixed it, and the claim went out that evening, with a predetermination for the crown right behind it. A 999 came back in minutes and a 277CA the next morning, both clean.

The seven stages of one claim

1. Verify eligibility, and the plan design (270/271)

   Before the visit, your system sends a 270 eligibility inquiry and the payer returns a 271 response: is coverage active on the date of service, what plan, what deductible remains.

   Dental verification has to go further than “active,” because plan design determines what you collect: remaining annual maximum, coverage tiers (the “100/80/50” skeleton), frequency history (a prophylaxis already used this period will not pay again), missing tooth clause, waiting periods, and downgrade behavior. Do the 270/271 twice, at scheduling and at check-in, and save the 271 response; it is your evidence in an appeal. See Verify eligibility and benefits and Bill dental claims.

2. Collect at the point of care

   Collect the estimated patient share under the plan’s coverage tiers, including amounts expected to exceed the remaining maximum. Explain that the final balance may change after adjudication. See Deductibles, coinsurance, and patient balances.

3. Document the visit

   The dentist records findings, radiographs, periodontal charting, and the treatment plan in the PMS. The DSO may provide the system, but the clinical record belongs under the practice’s professional control.

   The chart must support the submitted code, and radiographs or other clinical material may also serve as claim attachments. The practice should be able to connect each billed service to the contemporaneous record. See Billing compliance: the lines you never cross.

4. Code the encounter

   Dental claims carry two kinds of data doing two different jobs:

   • CDT codes: five characters consisting of a “D” and four digits; they identify what you did
   • Tooth number, surfaces, and quadrant/arch designations say where

   ICD-10-CM diagnosis codes appear when the payer requires them, including in some Medicaid dental programs. Dental claims also depend on tooth, surface, and oral-cavity information. In this example, the service lines include an evaluation, radiographs, a prophylaxis, and D2391, a one-surface posterior resin-based composite, with the tooth number and surface reported.

   The treating dentist retains authority over code selection. Operations should make sure the chart supports each code, the CDT tables are current for the date of service, and the claim carries the required tooth, surface, and other fields. Assigning codes remains the PC’s responsibility rather than the DSO’s. See CDT & the 837D.

5. Send the attachments and the predetermination

   Two dental-specific moves happen before or alongside submission.

   Attachments. Dental payers may require radiographs, periodontal charts, and narratives for crowns, scaling and root planing, implants, buildups, and other procedures. One current workflow uses NEA FastAttach or another attachment service to issue a reference number that is reported on the claim.¹ Follow the payer’s documentation policy so the claim does not pend for a later information request. The X12 275 claims-attachment standard has a May 2028 compliance date.² See Dental attachments.

   The predetermination. For the crown Dr. Okafor treatment-planned, Bluebird submitted a predetermination using an 837D marked as a predetermination request and a radiograph attached through an NEA number. The payer returns an estimate that the patient can review before treatment. A predetermination is not a guarantee because final adjudication uses eligibility, the remaining maximum, and frequency limits on the date of service.³ Preauthorization is different: some payers, particularly Medicaid dental plans and DHMOs, require approval before specified procedures are payable. See Get predeterminations.

6. Enter charges, scrub, and submit the 837D

   The biller enters the charges. A scrubber in the PMS, clearinghouse, or both checks the claim against payer-specific edits before submission. Common checks include current CDT codes, consistent tooth and surface data, NPI and taxonomy alignment, and an attachment reference when required.

   Resolve scrubber edits before submission. They are generally faster to correct than a payer rejection or denial. See Submit clean claims.

   The 837D identifies the billing provider (the PC, its Type 2 NPI, EIN, and address), the rendering dentist (Dr. Okafor and her Type 1 NPI), the subscriber and patient, and the claim. Each procedure has a service line with its CDT code, charge, units, and any applicable tooth, surface, or oral-cavity information. See The 837: how claims are told to payers and 837 file anatomy.

7. Read the acknowledgments

   Several come back, and they are not the same thing.

   Acknowledgment	From	Means
   TA1	Interchange level	The file envelope itself was or wasn’t readable
   999	Clearinghouse / payer	The file was syntactically valid X12 (or wasn’t)
   277CA	Payer	The payer accepted the claim into adjudication (or rejected it before adjudication)

   A 277CA rejection is not a denial. The claim never entered adjudication, no benefit determination was made, and the rejection usually does not stop the timely filing clock. Correct and resubmit it promptly. See X12 transaction sets.

Rejection versus denial

The distinction determines the next step. A rejected claim did not enter adjudication, while a denied claim did.

	Rejection	Denial
Where	Clearinghouse or payer front end	Payer adjudication
Signalled by	999 or 277CA	835 with a $$0 or reduced payment and CARC codes
Meaning	The claim was never accepted	The claim was processed and payment was refused
Fix	Correct and resubmit as a new claim	Corrected claim, or a formal appeal
Appeal rights	None, there’s nothing to appeal	Yes, with deadlines

Step 11 explains why downgrades, frequency limits, and exhausted maximums can produce zero or reduced payments without being claim rejections or true denials. See Claim denials, explained.

The eight things that reject first claims

First claims often fail for enrollment or configuration reasons such as these:

1. Billing provider NPI not recognized, EDI enrollment isn’t complete for that payer
2. Legal name mismatch between the W-9, the EIN letter, NPPES, and the claim
3. Taxonomy mismatch between what’s on the claim and what you enrolled with
4. Rendering dentist not credentialed or not linked to the group contract
5. Service date before the dentist’s effective date
6. Subscriber ID wrong, transposed digits, or the member ID without the alpha prefix
7. Missing required preauthorization on a Medicaid or DHMO service that needed one
8. Tooth or surface data missing, or inconsistent with the payer’s history, which trips duplicate and frequency flags

Most of these issues can be checked against the enrollment file and claim configuration before volume submission begins.

Test before you go live

Ask your clearinghouse whether the payer supports a test submission, and send one claim before sending a full batch. An accepted test claim provides evidence that the EDI enrollment, NPI, taxonomy, legal name, and effective date are configured correctly.

Your artifact from this step

• One claim accepted at 277CA
• One predetermination submitted for the treatment-planned crown, attachment included
• A documented rejection-resolution loop your biller can repeat
• Confirmed EDI connectivity to payer #1
• A saved 271 eligibility response attached to the encounter

Checklist

• Eligibility verified twice and the 271 response saved
• Plan design captured: remaining maximum, frequencies, downgrade behavior
• Patient share collected at the point of care
• Encounter documented before charges entered
• CDT codes assigned by the dentist, with tooth and surface data on every line that needs it
• Attachment uploaded and reference number on the claim where required
• Predetermination submitted for the crown
• Scrubber run and all edits cleared
• 837D submitted
• 999 received and clean
• 277CA received and shows accepted
• Any rejection corrected and resubmitted the same day

Next

Step 11: Read your first 835 and get paid

The remittance arrives, including a downgrade, and the money lands.

Sources

1. Vyne Dental, FastAttach; GEHA, NEA FastAttach payer instructions; Open Dental, claim attachments documentation.
2. Administrative Simplification: Adoption of Standards for Health Care Claims Attachments Transactions and Electronic Signatures, 91 Fed. Reg. 14350 (Mar. 24, 2026), compliance May 26, 2028. Federal Register.
3. ADA, Pre-authorizations and pre-treatment estimates.