Home / Services / Electronic Claims Submission

Electronic claims submission

Electronic Claims Submission for Therapy and Psychiatry Practices

Electronic claims submission is how a practice sends insurance claims to payers as standard digital files, usually through a clearinghouse, instead of on paper.

MCM South Medical Billing Service files electronic claims for psychotherapists and psychiatrists, solo and group. We work in mental and behavioral health only, so the codes, modifiers and payer quirks are the ones we see every day.

Get a Free Quote

Who this is for

Solo and group psychotherapists who want claims filed correctly the first time
Psychiatrists billing E/M visits with psychotherapy add-on codes
Office managers who are tired of chasing rejections
Practices moving from paper or portal entry to clean electronic filing

What is electronic claims submission?

Electronic claims submission is the process of sending a health insurance claim to a payer as a standardized electronic file, called an 837P for professional services, instead of mailing a paper CMS-1500 form.

Federal rules adopted version 5010 of the ASC X12 837 health care claim standard, with compliance required from January 1, 2012 (CMS.gov, checked 10/1/26). The paper form and the electronic file ask for the same kind of information: who the patient is, who the payer is, who rendered the service, the diagnosis, the code and the place of service.

The paper CMS-1500 is maintained by the National Uniform Claim Committee (NUCC). Its current instruction manual is version 13.0, released July 2025 (NUCC, checked 10/1/26). CMS lists the 02/12 version of the form as the one Medicare accepts on paper.

Why it matters for your cash flow. A claim that fails a front-end check never reaches the payer's payment system. Nothing is paid until it is fixed and sent again. Clean data on the first send is the cheapest fix there is.

How does electronic claims submission work?

A claim is built from the session record, checked by a clearinghouse, accepted or rejected by the payer's front end, adjudicated, and paid with an electronic remittance advice (835) and an electronic funds transfer (EFT).

1. Build the claimPatient and subscriber, payer, billing and rendering provider NPIs, ICD-10-CM diagnosis, CPT code and units, modifiers and place of service all come from the visit and the note. See our CPT and E/M code guide for the codes.
2. Clearinghouse checkA clearinghouse checks the file format and basic data, then passes it to the payer. If it finds a problem, it returns the claim.
3. Payer front-end acceptanceThe payer either accepts the claim into adjudication or returns it. X12's claim status category code A3 describes this case: the claim was returned as unprocessable, "rejected and has not been entered into the adjudication system" (X12, checked 10/1/26). A rejection is not a denial. You correct the data and resubmit. There is nothing to appeal.
4. AdjudicationThe payer decides whether to pay, deny or pend the claim based on the member's benefits, the code, authorization and its own policies.
5. Remittance and postingThe payer returns an 835 electronic remittance advice. The federal standard for it is version 5010, with EFT payment standards following on 1/1/2014 (CMS.gov, checked 10/1/26). Payment is posted, and anything short-paid or denied goes to follow-up.

CMS also adopted claim status standards (276/277). They let you ask a payer where a claim stands without calling. Claims-processing terms are defined in our glossary.

Why mental health claims reject or deny

Most behavioral health rejections come from mismatched data: the wrong NPI, a diagnosis that does not support the code, a missing modifier, or the wrong payer on the claim.

Provider data. The billing NPI, rendering NPI and enrollment record have to match what the payer has on file. This is a credentialing issue as often as a billing issue.
Code and time. Psychotherapy codes are time-based. The note has to support the time range of the code you bill. See individual psychotherapy codes and documentation requirements.
Modifiers and place of service. Telehealth claims depend on the right modifier and place-of-service code. Medicare contractor guidance defines modifier 95 as a synchronous telemedicine service delivered by real-time audio and video, and limits GT to certain institutional claims (First Coast Service Options, 2/17/26). Private payers and Medicaid set their own telehealth rules, so do not assume the Medicare rule applies.
Correct coding edits. CMS built the National Correct Coding Initiative (NCCI) to promote correct coding of Medicare Part B claims. Its procedure-to-procedure edits block incorrect code pairs, and medically unlikely edits cap units of service (CMS.gov, checked 10/1/26). Many commercial payers run similar edits.
Coverage problems. A claim sent to the wrong payer, or to a plan whose behavioral health benefits are managed by another company, bounces. Verify first. See eligibility terms.

Psychotherapists and psychiatrists bill differently

Psychotherapists

Claims center on time-based psychotherapy codes, plus diagnostic evaluation, family, group and crisis sessions. The session length in the note drives the code. Telehealth and in-home visits add modifier and place-of-service decisions.

Start with non-E/M CPT codes and diagnostic evaluation.

Psychiatrists

Claims center on evaluation and management (E/M) visits for medication management, often with a psychotherapy add-on code on the same claim. The E/M level and the add-on both have to be supported by the note, and the pair has to be coded in a way the payer accepts.

Start with E/M codes and psychotherapy add-on codes.

Rules differ by payer type and by state

Keep these separate. They often conflict, and none of them replaces the payer's own provider manual.

Private (commercial) payers

Timely filing limits, the definition of a clean claim and telehealth rules come from each payer's contract and provider manual. State prompt-pay laws also differ, so check your state insurance department. Never carry one payer's rule over to another. Blue Cross and Blue Shield plans, for example, are independent licensees. See our private insurance guides.

Medicare

The Administrative Simplification Compliance Act (ASCA) requires Medicare suppliers to submit claims electronically, with exceptions. A provider with fewer than 10 full-time-equivalent employees may file on paper (Noridian Medicare, checked 10/1/26; see the ASCA page).

Medicare denies a claim received more than 12 months after the date of service, with four exceptions in 42 CFR 424.44(b): administrative error, retroactive Medicare entitlement, a State Medicaid recoupment six or more months after service, and retroactive Medicare Advantage or PACE disenrollment (CMS Transmittal 12909, 10/24/24). Medicare defines a clean claim as one with no defect requiring the contractor to investigate before adjudication (MLN Matters MM5355, 2007, an older document).

Medicaid and state rules

Each state Medicaid program and each Medicaid managed care plan sets its own filing limits, codes and billing manual. Do not infer one state's rules from another. See our Medicaid HCPCS guide for state pages.

How MCM South files your claims

What we do

We build and submit your claims electronically, check each one before it goes out, and follow it through to payment, rejection or denial. When a claim rejects, we correct the data and resubmit it. When it denies, it moves to appeals. We bill in-network and out-of-network claims for our clients.

Code, diagnosis, modifier, place of service and NPI checks before submission
Separate handling for psychotherapy claims and psychiatric E/M with add-on claims
Telehealth and in-home claims checked against the payer's own rules
Rejections corrected and resubmitted, denials sent to appeals

We serve clients in Georgia, Massachusetts, Connecticut, Texas, Florida, New York, Colorado, Tennessee, North Carolina and Illinois. See who we serve and all of our services. Network status changes how claims pay. Our in-network vs out-of-network guide explains it.

Electronic claims submission FAQ

What is the difference between an 837P and a CMS-1500?

The CMS-1500 is the paper claim form, maintained by the NUCC. The 837P is the electronic professional claim in the ASC X12 5010 format that federal rules adopted for health care claims. They carry the same kind of information, and most payers expect the electronic version.

What is a clean claim, and why do claims get rejected?

Medicare defines a clean claim as one with no defect that requires the contractor to investigate before it pays. A rejected claim never entered adjudication, usually because of missing or mismatched data. You fix the data and resubmit. A denied claim was processed and refused, and goes through appeals instead.

What is an 835, and how is it different from a payment?

An 835 is the electronic remittance advice. It explains how the payer processed each claim and line. The payment itself usually arrives separately as an electronic funds transfer, and the two are matched. Federal standards cover both.

What is the timely filing deadline for therapy and psychiatry claims?

Medicare allows 12 months from the date of service, with four narrow exceptions. Private payers and state Medicaid programs set their own limits in their contracts and manuals, so confirm each payer's rule before you rely on it.

Why was my telehealth claim rejected for a modifier or place of service?

Payers differ on which telehealth modifier and place-of-service code they want. Medicare contractor guidance defines modifier 95 for real-time audio and video, but commercial and Medicaid payers can require something else. Check the payer's telehealth policy and the rules on our modifier and place-of-service pages.

Sources and date checked

Sources checked 10/1/26. Payer rules, deadlines and form versions change. Confirm against the current source before you rely on one. This page is operational guidance for a billing service. It is not legal advice.

Stop chasing rejected claims

Tell us about your practice. We file the claims, fix the rejections and follow up on denials, for psychotherapists and psychiatrists.

Get a Free Quote