Guide

No Diagnosis Yet? What Goes in the Good Faith Estimate Code Field

Summary

A good faith estimate for a new self-pay client needs no diagnosis code when you have not yet made a diagnosis. Federal guidance requires a code only where one is needed to calculate the estimate, and names initial screening and evaluation and management visits as cases where none is. Leave the diagnosis field empty, and fill the expected service codes and expected charges, which are required either way.

By Gale Editorial · Updated 2026-09-01. Every figure cited to a dated source. How we write.

What goes in the diagnosis field before you have a diagnosis

Nothing, if you have not determined one. HHS answered this question directly in the April 2022 good faith estimate FAQs: a provider is required to provide a diagnosis code only where one is required for the calculation of the estimate, and none is required when a diagnosis has not been determined at the time of scheduling 1. Initial screening visits and evaluation and management visits are the agency's own examples.

The regulation is built the same way. The required content list at 45 CFR 149.610(c)(1)(iv) calls for applicable diagnosis codes, expected service codes, and expected charges associated with each listed item or service 2. The word applicable is doing the work there. The field is conditional on it, and there is no standing duty to produce a code for every estimate you issue.

That FAQ is sub-regulatory guidance and says so on its own face: the agency's reading of its own rule, which is the best answer available on this question, and not the rule itself.

What the estimate has to carry instead

The expected charges and the service codes, both of them, even when no diagnosis code is available 1. The two boxes draw on different code sets by definition: 45 CFR 149.610 defines a diagnosis code as an ICD code and a service code as a CPT, HCPCS, DRG or NDC code 2. The service box can be filled from the appointment type alone, before anyone has been assessed.

The rest of the required content is administrative and you already hold all of it. The estimate carries an itemized list of the items and services you reasonably expect to furnish, your name, your national provider identifier and taxpayer identification number, the location, and the disclaimers the rule specifies 2.

Whether a records fee or a late cancellation charge belongs on that itemization is a separate question from where the charge sits on the form. The test before a new fee comes first: settle whether you may bill it at all, then list it.

Why a placeholder code costs more than a blank field

A guessed diagnosis becomes part of a record. HHS treats a good faith estimate as part of the patient's medical record 1, so a code typed in to satisfy a template travels with the chart. The outpatient coding rules run the same direction: the ICD-10-CM Official Guidelines for FY 2026 instruct against reporting a diagnosis documented as probable, suspected, questionable, rule out or working, and direct coding to the highest degree of certainty known 3.

But those guidelines govern what goes on a claim rather than what goes on an estimate, and the difference cuts in your favor here. Where a definitive diagnosis has not been established, the guidelines allow a sign or symptom code on the claim 3. Before a first appointment you do not have a documented sign or symptom either, because nobody has been assessed yet.

An empty field records exactly what you knew on the day you issued the estimate.

The question changes once the client has been seen. A superbill without a diagnosis code is a different problem, because the client hands that document to a plan and the plan will want a code on it.

When the template demands a code the rule does not

Change the template. CMS publishes a model good faith estimate template whose diagnosis block is labeled Patient Diagnosis (if determined) and whose itemization column reads Diagnosis Code (if required for the calculation of the GFE), at revision date August 2023 4. The same document states that providers and facilities do not have to use that specific form as long as the form they use includes the required information 4.

So a practice-management system that will not save an estimate without a diagnosis code is enforcing its own design. Nothing in the content list requires a code where no diagnosis exists 2. Where the field cannot be cleared, a common convention is to enter a short phrase such as not yet determined instead of a code. Keep the conditional wording from the model form visible on the document, so the client can see why the line is empty.

A form you control also fixes the reverse problem, which is a template that quietly omits something the rule does require. Check yours against the content list before the next estimate goes out: the itemization, the service codes, the identifiers, the location and the disclaimers 2.

Who gets an estimate, and when it is due

An uninsured or self-pay individual gets one, and self-pay reaches further than the word suggests. The definition at 45 CFR 149.610 covers a patient who has benefits for the item or service but who does not seek to have a claim for it submitted to their plan 5. A practice that stays out of network and bills clients directly is issuing estimates to insured people all day.

The clock starts at scheduling or at the request. When the service is scheduled at least three business days out, the estimate is due no later than one business day after scheduling, and when it is scheduled at least ten business days out, no later than three business days after scheduling. When someone just asks what it will cost, it is due no later than three business days after the request 2. Any conversation about cost counts as that request 2.

Business days here means Monday through Friday excluding federal holidays, and the estimate is due by 11:59PM on the day it is owed; a state acting as primary enforcer may also exclude state holidays 6. But no estimate is required at all when the client schedules fewer than three business days before the visit, and one issued voluntarily inside that window is not eligible for the patient-provider dispute resolution process 6.

That is why the estimate belongs in the first call to first session sequence, ahead of the packet the client opens on the morning of the appointment.

The number the bill gets measured against

The total expected charges, not the diagnosis. A self-pay patient can open the federal patient-provider dispute resolution process when billed charges are substantially in excess of the estimate, and 45 CFR 149.620 defines that as at least $400 more than the total amount of expected charges listed on that provider's estimate 7. The diagnosis line carries no comparable exposure.

So the accuracy that matters on a pre-intake estimate lives in the charge lines. Name the service you expect to deliver, the number of sessions you expect within the period the estimate covers, and the charge for each, and keep the total realistic. A client billed well above the quoted total has a federal process to use. A client looking at a blank diagnosis line has nothing there to dispute.

Two housekeeping duties close it out. A quote given orally has to be furnished in writing, and the estimate has to stay available so a copy can be provided on request for six years 2. Set the diagnosis line on your own form to read if determined before the next new client books.

Common questions

Yes, when no diagnosis has been determined at the time of scheduling. Federal guidance requires a diagnosis code only where one is needed to calculate the estimate, and names initial screening and evaluation and management visits as situations where none is. The expected charges and the service codes still have to be there. Blank means undetermined, so keep the conditional wording on the form.

That is a template rule, not a federal one. The CMS model form labels its diagnosis block if determined and its code column if required for the calculation, and the agency states that no particular form is mandatory as long as yours carries the required information. Where the field cannot be cleared, a common convention is a short phrase such as not yet determined in place of a code.

Often, yes. The rule treats a patient as self-pay when they have benefits for the item or service but do not seek to have a claim submitted to their plan, which is what an out-of-network practice billing clients directly is doing. The estimate duty and the deadlines follow from that election. Whether the plan contract permits it is a separate question from the estimate rule.

Any conversation about cost counts as a request, and a request is due within three business days. For a scheduled service the clock is tighter: one business day after scheduling when the appointment is at least three business days out, three business days after scheduling when it is at least ten business days out. Business days run Monday through Friday, excluding federal holidays.

A self-pay patient can start the federal patient-provider dispute resolution process when billed charges run substantially in excess of the estimate, defined as at least $400 more than the total expected charges on that estimate. The comparison is against the charge total, so that is where estimating carefully pays. An estimate you issued voluntarily inside the under-three-business-day window is not eligible for that process.

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References

  1. 1.U.S. Department of Health and Human Services (2022). FAQs About Consolidated Appropriations Act, 2021 Implementation — Good Faith Estimates (GFEs) for Uninsured (or Self-Pay) Individuals — Part 2. Centers for Medicare & Medicaid Services (CCIIO). link ✓The core answer: a diagnosis code is required on a good faith estimate only where one is required for the calculation of the estimate, none is required when a diagnosis has not been determined at scheduling, initial screening and evaluation and management visits as the agency's examples, the duty to include expected charges and service codes regardless, and that the estimate is part of the patient's medical record.
  2. 2.U.S. Department of Health and Human Services (2026). 45 CFR 149.610 — Requirements for provision of good faith estimates of expected charges for uninsured (or self-pay) individuals.. Electronic Code of Federal Regulations (eCFR), Office of the Federal Register. link ✓The regulation's required-content list at (c)(1)(iv) and the word applicable that conditions the diagnosis field, the definitions of diagnosis code (ICD) and service code (CPT, HCPCS, DRG or NDC), the remaining required content including the identifiers and disclaimers, the one-business-day and three-business-day issuance clocks, that any cost discussion is a request, the written-form rule for an oral quote, and the six-year copy-on-request duty.
  3. 3.Centers for Medicare & Medicaid Services and National Center for Health Statistics (2025). ICD-10-CM Official Guidelines for Coding and Reporting FY 2026 (October 1, 2025 - September 30, 2026). CMS.gov (cms.gov/files/document). link ✓The outpatient diagnosis-reporting rules used to explain why a placeholder code is the wrong move: do not report probable, suspected, questionable, rule-out or working diagnoses, code to the highest degree of certainty, and sign or symptom codes are acceptable on a claim where a definitive diagnosis has not been established.
  4. 4.Centers for Medicare & Medicaid Services (2023). Sample Good Faith Estimate for Uninsured (or Self-Pay) Individuals. CMS, No Surprises Act provider resources. link ✓The model form's field labels, Patient Diagnosis (if determined) and Diagnosis Code (if required for the calculation of the GFE), at revision date August 2023, and the statement that the specific form is not mandatory so long as the form used includes the required information.
  5. 5.U.S. Departments of Health and Human Services, Labor, and the Treasury (2025). 45 CFR § 149.610 — Requirements for provision of good faith estimates of expected charges for uninsured (or self-pay) individuals. Code of Federal Regulations (Annual Edition), U.S. Government Publishing Office (govinfo.gov). link ✓The definition of uninsured (or self-pay) individual that reaches a patient who has benefits for the service but who does not seek to have a claim for it submitted, which is what puts an out-of-network practice's insured clients inside the estimate duty.
  6. 6.Centers for Medicare & Medicaid Services; U.S. Department of Labor; U.S. Department of the Treasury (2022). FAQs About Consolidated Appropriations Act, 2021 Implementation – Good Faith Estimates (GFEs) for Uninsured (or Self-Pay) Individuals – Part 5. Centers for Medicare & Medicaid Services. link ✓The mechanics of the clock and the applicability edge: business days as Monday through Friday excluding federal holidays with an 11:59PM deadline and possible state-holiday exclusions, that no estimate is required when the service is scheduled fewer than three business days out, and that a voluntarily issued estimate is not eligible for patient-provider dispute resolution.
  7. 7.U.S. Department of Health and Human Services (2026). 45 CFR 149.620 — Requirements for the patient-provider dispute resolution process.. Electronic Code of Federal Regulations (eCFR), Office of the Federal Register. link ✓The definition of substantially in excess, billed charges at least $400 more than the total expected charges on the estimate, as the threshold that opens the patient-provider dispute resolution process and the reason the charge total is the field carrying the exposure.

https://www.gale.care/for-providers/pq-gfe-diagnosis-code-before-intake · 7 sources. Competitor details are cited to dated public sources and maintained as they change; figures are estimates, not commitments. Synthetic demonstration.

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