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What is a superbill, and what do patients do with it?

Every field a superbill needs, a filled example for a therapy visit, how a patient-submitted claim differs from a CMS-1500, and the honest reasons most superbills never turn into money.

October 10, 2026 · 14 min read

If you run a cash-pay practice you have had this conversation. A patient pays at the front desk, likes the visit, books the next one, and asks: "Can you give me something I can send to my insurance?" What they want is a superbill.

This post is the long answer. What a superbill is and is not, every field it needs, a filled example from a real therapy visit, how a patient-submitted claim differs from the CMS-1500 a billing department would file, and what out-of-network benefits mean in dollars. Plus the part most articles skip: why a large share of the superbills you print will never produce a dollar, and which of those failures are your fault.

What is a superbill?

A superbill is an itemized receipt for a visit, written in the codes an insurer can read. It names the patient, the provider, the date, what was done (CPT codes), why it was done (ICD-10 diagnosis codes), where it happened (place of service), what you charged, and what the patient paid.

That is all it is. A superbill is not a claim. It carries no authority, triggers no adjudication and obligates no one. The patient attaches it to their insurer's member claim form and files the claim themselves. That is the point: it lets a practice refuse to bill insurance without abandoning patients who have out-of-network benefits.

People ask "what are superbills" in the plural because the word covers two things: in an insurance-billing practice it is the internal charge-capture sheet a clinician marks up for a biller, and in a cash-pay practice it is the patient-facing document above. If you searched "what is a superbill for insurance," you mean the second one. It is also not a good faith estimate, which has its own federal rules and is the document most cash-pay practices are out of compliance on. More on that below.

What a superbill must contain

No federal form defines a superbill. What defines it in practice is the data an insurer needs to adjudicate, which is the data set on the CMS-1500. Leave any of it out and the claim comes back under X12 reason code 16, "Claim/service lacks information or has submission/billing error(s)" (x12.org).

Field	Common failure
Patient legal name, DOB, address	A nickname instead of the name on the policy
Subscriber name and member ID	Patient is a dependent and only their own name appears
Date of each service	A month-range summary instead of individual dates
CPT code per service	A description with no code
Units or minutes per code	Blank, on a time-based code
ICD-10-CM diagnosis code	A symptom with no code, or an unspecified code
Place of service code	Telehealth billed as office
Charge per line and total	One lump sum, no line items
Amount paid and balance	Missing, so the plan cannot see the patient paid
Provider name, credentials, license number	Credentials omitted
Provider NPI	Wrong NPI type
Practice name, address, phone, EIN or TIN	A PO box address
Provider signature and date	Unsigned PDF

The field that is missing is always the field that kills the claim, which is why our superbill generator is built around exactly that list.

A filled example, field by field

A complete superbill for a 60 minute psychotherapy session delivered by video to a patient at home, paid in full at the time of service. Names and identifiers are invented.

Field	Value
Document title	Superbill / Statement for Insurance Reimbursement
Date issued	2026-10-09
Patient	Marisol Reyes Delgado (legal name as on the card)
Patient DOB	1988-03-14
Patient address	418 NW 9th Ave, Apt 3, Boca Raton, FL 33486
Subscriber	Marisol Reyes Delgado (if not the patient, name the subscriber)
Insurer and member ID	Example Health PPO, XJQ4471920
Rendering provider	Dana F. Whitmore, LCSW
State license	FL SW12345
Individual NPI (Type 1)	1234567893
Practice	Harbor Point Counseling PLLC
Practice address and phone	2200 Glades Rd, Suite 410, Boca Raton, FL 33431 / (561) 555 0144
EIN (TIN)	65-1234567
Date of service	2026-10-02
Place of service	10
CPT code	90837
Units	1
ICD-10-CM	F41.1
Charge	$185.00
Patient paid	$185.00, Visa, 2026-10-02
Balance due	$0.00
Provider signature	Dana F. Whitmore, LCSW, signed 2026-10-09

Four of those values deserve explaining.

CPT 90837. CPT is the procedure code set. The AMA holds the copyright and states that "Any entity using CPT content anywhere worldwide must have a license" (ama-assn.org), which is why vendors, ours included, let you enter your own codes rather than shipping a searchable CPT database. San Francisco's published behavioral health code sheet gives 90837 as "Psychotherapy, 60 Min with patient" with a billable range of 53 to 67 minutes, and 90834 as the 45 minute code at 38 to 52 minutes (sf.gov). A 48 minute session coded 90837 is an error an insurer can find. For a functional medicine or integrative visit the code is usually an evaluation and management code: the AMA defines 99214 as "Established patient office or other outpatient visit, 30-39 minutes," selected on total time on the date of the encounter (ama-assn.org). Spend 75 minutes and bill 99214 out of habit and you are underselling the visit.

ICD-10-CM F41.1. The diagnosis code set. CMS states that the CDC develops and maintains ICD-10-CM, that it replaced ICD-9 for diagnoses on October 1, 2015, that it applies to all HIPAA-covered parties, and that new code sets take effect each October 1 (cms.gov). The NIH National Library of Medicine lookup returns F41.1 as "Generalized anxiety disorder" (clinicaltables.nlm.nih.gov). The practical trap is that October cycle: a code sitting in a template since 2023 can quietly stop being valid.

Place of service 10. CMS defines 11 as Office, 12 as Home, 02 as "Telehealth Provided Other than in Patient's Home" and 10 as "Telehealth Provided in Patient's Home" (cms.gov). A video session with a patient in their kitchen is 10, not 11. This is one of the most common errors on patient-submitted claims and it is trivially avoidable.

NPI and EIN. CMS describes the NPI as a "10-digit standard unique health identifier for health care providers," assigned through the National Plan and Provider Enumeration System, Type 1 for individuals and Type 2 for organizations, applied for free at nppes.cms.hhs.gov (cms.gov). A solo practitioner billing as a PLLC may hold both: individual NPI on the rendering line, organization NPI as the billing entity. Mixing them up is a rejection. The IRS describes the EIN as "a federal tax ID number for businesses, tax-exempt organizations and other entities," issued free (irs.gov). Sole proprietors without one can use an SSN, and most should get an EIN rather than mail a social security number to an insurer.

Superbill vs CMS-1500

The CMS-1500 is the professional paper claim form. CMS says the National Uniform Claim Committee designs and maintains it, that CMS does not supply it, that acceptable forms must be printed in "Flint OCR Red, J6983, (or exact match) ink," and that photocopies and downloaded printouts cannot be scanned reliably (cms.gov).

	Superbill	CMS-1500
Who submits it	The patient	The practice, usually electronically
Legal status	An itemized receipt	A claim
Format	Any legible PDF	Scannable red-ink form, or the 837P electronic equivalent
Triggers adjudication	No	Yes
Who gets paid	The patient, by reimbursement	The practice, by the plan

The form's field map tells you what the data has to look like. Per the Medicare contractor instructions: Item 21 takes up to 12 diagnosis codes to the highest specificity with no periods, plus an ICD indicator of 0 meaning ICD-10-CM; 24B is place of service; 24D is the CPT or HCPCS code plus modifiers; 24F is the charge in cents; 24J is the rendering provider NPI; Item 25 is the federal tax ID; 33a is the billing provider NPI (noridianmedicare.com).

Here is what trips practices up. Most insurers do not want a patient mailing them a CMS-1500 at all. They want their own member claim form with the itemized bill attached. Aetna's member claim form asks for policy and payment details and instructs the member to submit it "along with your itemized bills and receipts," taping small receipts to a full-size sheet and writing the member ID on every document (aetnainternational.com). So the real workflow is the insurer's form plus your superbill as the itemized bill. It has to survive a human in a mailroom, not just an OCR scanner.

What out-of-network benefits actually mean

A superbill only produces money if the patient has out-of-network benefits and has met the relevant deductible. Four federal definitions decide the outcome:

• Deductible: "The amount you pay for covered health care services before your insurance plan starts to pay" (healthcare.gov).
• Allowed amount: "The maximum amount a plan will pay for a covered health care service." If the provider charges more, "you may have to pay the difference" (healthcare.gov).
• UCR: "The amount paid for a medical service in a geographic area based on what providers in the area usually charge for the same or similar medical service. The UCR amount sometimes is used to determine the allowed amount" (healthcare.gov).
• Out-of-network coinsurance: "The percentage (for example, 40%) you pay of the allowed amount for covered health care services to providers who don't contract with your health insurance or plan" (healthcare.gov).

The plan does not reimburse a percentage of your fee. It reimburses a percentage of its own allowed amount, after the deductible, and the patient eats the gap. Take the $185 session, a plan with a $120 allowed amount for 90837 and 40 percent out-of-network coinsurance:

Step	Amount
Your charge	$185
Plan's allowed amount	$120
Plan pays 60% of allowed, deductible met	$72
Patient's net cost	$113
Effective reimbursement on your fee	39%

Same visit before the deductible is met: the plan pays $0 and credits the $120 toward the deductible. That is not a rejection, and patients routinely misread it as one.

Whether the deductible is met is not a trivial question. KFF's 2025 Employer Health Benefits Survey puts the average general annual deductible for single coverage at $1,886, with 34 percent of covered workers facing $2,000 or more (kff.org). Out-of-network deductibles are typically separate and larger. A patient in January is usually getting nothing back and should be told so before they pay you.

We have not found a credible published figure for the average out-of-network reimbursement rate and we are not going to invent one. The honest answer to "how much will I get back" is: read your out-of-network deductible and coinsurance, then call the plan and ask the allowed amount for this CPT code. Give patients that sentence verbatim.

Timelines after the patient mails it

For most employer plans the clock is set by federal ERISA rules. The Department of Labor states that a plan must decide a post-service claim within 30 days, extendable by up to 15 days for reasons beyond its control if it notifies the claimant first; a participant has at least 180 days to appeal an adverse determination; and the plan has no more than 60 days to decide a post-service appeal (dol.gov). Calendar days. A denial notice must state the specific reasons, the plan provision relied on, and how to appeal.

So the realistic answer to "when do I get my money" is four to eight weeks for a clean submission, three to six months if it is denied once and appealed. Separately, every plan has a timely filing limit, and X12 code 29 is simply "The time limit for filing has expired." A superbill handed over nine months late can be worth nothing for that reason alone. Issue them monthly.

What makes an insurer reject a superbill

The standard rejection vocabulary is the X12 Claim Adjustment Reason Code list. These are the ones that show up on patient-submitted out-of-network claims, quoted exactly (x12.org):

Code	Text	What went wrong
16	"Claim/service lacks information or has submission/billing error(s)."	A missing field. Usually NPI, EIN, units or place of service
29	"The time limit for filing has expired."	Superbill issued too late
50	"These are non-covered services because this is not deemed a 'medical necessity' by the payer."	Diagnosis does not support the procedure
96	"Non-covered charge(s)."	Service excluded from the plan
109	"Claim/service not covered by this payer/contractor."	Wrong payer or wrong plan
170	"Payment is denied when performed/billed by this type of provider."	Provider type not covered out of network
185	"The rendering provider is not eligible to perform the service billed."	License or scope mismatch for that code
204	"This service/equipment/drug is not covered under the patient's current benefit plan"	No out-of-network benefit at all
242	"Services not provided by network/primary care providers."	HMO with no out-of-network coverage

Notice the pattern. Codes 16, 50, 170 and 185 are yours: a blank field, a lazy diagnosis code, a credential you did not state, a code outside your scope of practice. Codes 96, 204 and 242 belong to the plan and nothing you write changes them. Knowing which is which saves the hour you would spend re-issuing a document that was never going to be paid. The two we see most are an unspecified diagnosis code where a specific one exists, and telehealth coded as place of service 11. Both are thirty-second fixes before the PDF goes out and unwinnable arguments afterward.

The uncomfortable part: most superbills are never submitted

Printing superbills feels like solving the problem. It usually is not, because the patient still has to download their insurer's form, fill it out, attach the superbill, mail or upload it, and follow up in six weeks. Practices that track this tell us the submission rate is low. We do not have a published number we trust, so we will not quote one, but you can measure it yourself by asking at the next visit whether the last superbill was ever sent.

What moves the number, in order of effect:

1. Hand it over before the patient leaves, not at year end. A superbill emailed the same evening gets submitted far more often than twelve attached to a December summary.
2. Put the instructions on the document. One line: "Attach this to your plan's member claim form from your member portal, and keep a copy."
3. Set the expectation in writing at intake. Out-of-network deductible, coinsurance, and the fact that you do not bill insurance and cannot appeal for them.
4. Never guess a code. A wrong code is worse than a late superbill, because it produces a denial the patient will blame on you.

The good faith estimate you also owe

This is federal law, and cash-pay practices get it wrong constantly. Under 45 CFR 149.610, an "uninsured (or self-pay) individual" includes someone who has coverage under a group health plan but "does not seek to have a claim for such item or service submitted to such plan or coverage" (ecfr.gov). Your insured patient who pays cash and plans to file their own superbill is a self-pay individual, and is owed a good faith estimate.

The required contents include the patient's name and date of birth, a plain-language description of the service, an itemized list of expected items and services, applicable diagnosis codes, expected service codes and expected charges for each, and the name, NPI and TIN of each provider, plus the required disclaimers. Timing: within 1 business day of scheduling when the service is scheduled at least 3 business days out, and within 3 business days when it is scheduled at least 10 business days out or when the patient simply asks (ecfr.gov). CMS guidance adds that a diagnosis code is needed only when one is required to calculate the estimate, so an initial evaluation with no diagnosis yet can omit it while still listing service codes and charges (cms.gov). CMS's model estimate spells out the consequences: a patient whose bill is "$400 or more for any provider or facility" above the estimate may dispute it, within 120 calendar days of the date on the original bill, and the process carries a $25 fee (cms.gov).

Note that a good faith estimate and a superbill carry nearly the same data: name, NPI, TIN, service codes, diagnosis codes, charges. A system that can produce one should produce the other from the same record, which is how we built it and part of why DrinCloud plans start at $49 a month rather than the price of a claims engine you do not need.

HSA and FSA money

Even when a plan reimburses nothing, your fee may still be payable with pre-tax dollars. IRS Publication 969 defines qualified medical expenses as amounts paid for medical care as defined in Code section 213(d) for the account holder, spouse and dependents, and states that distributions are tax free only to the extent the expenses are "not reimbursed by insurance or otherwise." For 2026 the HSA contribution limits are $4,400 for self-only coverage and $8,750 for family coverage; the health FSA salary reduction limit was $3,300 for tax years beginning in 2025, with a maximum carryover of $660 where the plan allows one (irs.gov).

What substantiates an HSA or FSA expense is an itemized receipt showing provider, date, service and amount paid. Your superbill already is that receipt. For a patient with a high deductible and an HSA, the tax treatment is often worth more than any reimbursement, and saying so beats promising insurance money.

The bottom line

A superbill is a receipt in insurance language. It costs you two minutes and it is the thing that makes a cash-pay practice workable for patients with out-of-network benefits. It also fails quietly and often: no benefit in the plan, deductible not met, filed too late, or a code that was wrong when it left your office.

Your job is narrow and worth doing properly. Get every field on it, code the visit accurately, state the place of service correctly, hand it over the same day, and tell the patient the truth about their deductible before they pay. Then stop. You are not their biller, you cannot appeal for them, and pretending otherwise sets up a conversation nobody enjoys.

Our software generates superbills as PDFs with NPI, EIN, CPT and ICD-10 codes and the patient's balance, straight from the visit you just charted. We do not submit insurance claims, we have no clearinghouse and no eligibility check, and that is deliberate. See how superbills work, or open an account and try it on a real visit.

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