Chapter 1 — Key Takeaways
The four numbers
$$\text{Charge} - \text{Allowed amount} = \text{Contractual adjustment}$$ $$\text{Allowed amount} - \text{Patient responsibility} = \text{Plan payment}$$
| Number | Set by | Who pays it |
|---|---|---|
| Charge | the provider, unilaterally | almost nobody |
| Allowed amount | the contract between provider and payer | the plan and the patient, together |
| Contractual adjustment | arithmetic — charge minus allowed | nobody; it is written off |
| Patient responsibility | the benefit design, applied to the allowed amount | the patient |
The one that gets people fired: patient responsibility is computed on the allowed amount, never on the charge.
The cycle, in one line each
| Stage | The money is a… |
|---|---|
| Access — schedule, register, verify, authorize | promise |
| Encounter — the visit, the note, charge capture | promise |
| Coding — ICD-10-CM, CPT, HCPCS, modifiers | claim (a factual assertion and a legal certification) |
| Submission — scrub, transmit, acknowledge | receivable (and it starts losing value immediately) |
| Remittance — post, adjust, balance | decision |
| Follow-up — denials, appeals, statements | recovery, or not |
Front end causes most of the back end's work. The middle concentrates the legal exposure.
The six leaks
- Registration — wrong ID, terminated coverage, missing authorization. Prevent: one minute.
- Charge capture — the service happened and was never charged. Detected: often never.
- Documentation — the note does not support what was done.
- Coding — wrong code, missing modifier, wrong units.
- Submission — rejected at the clearinghouse and nobody read the report.
- Follow-up — the denial expired unworked.
The cost of a fix rises steeply and monotonically with how late it is found. Nothing in the revenue cycle gets cheaper by waiting.
The two clocks
- Timely filing starts on the date of service. Governs submission.
- Appeal starts on the date of the denial — not the date you read it. Governs disputes.
They overlap, they are different lengths, and which one applies depends on whether the remedy is a corrected claim or an appeal. Write the deadline on the account, not the date you worked it.
One encounter, two claims
| Facility | Professional | |
|---|---|---|
| Who bills | the institution | the clinician's group |
| Form | UB-04 (CMS-1450) | CMS-1500 |
| Electronic | 837I | 837P |
| What it covers | rooms, staff, supplies, equipment | the licensed professional's own work |
The same CPT code can appear on both and be correct on both. Ask whose resources were consumed.
The two jobs
A coder reads the documentation and assigns codes that are accurate, complete, specific, and defensible. A coder does not own the clinical decision, the coverage determination, the practice's revenue, or the content of the note.
A biller turns a coded encounter into a claim that can be adjudicated, gets adjudicated correctly, and is collected in full — from the plan, the secondary, and the patient.
Key terms
revenue cycle · encounter · charge · claim · allowed amount · contractual adjustment · patient responsibility · accounts receivable · clean claim · remittance advice · denial · payer · provider
Monday morning
You should be able to:
- Take a patient statement and an explanation of benefits and account for every dollar on both.
- Answer "why did my insurance only pay \$757 of a \$3,842 bill?" in under a minute, correctly, on the phone, without making the caller angrier.
- Look at any failure in a business office and say which of the six leaks it is, who owns it, and where it was cheapest to fix.
- Tell a denial from a rejection, and know that only one of them has appeal rights.
- Explain to a patient why two bills for one visit is not a duplicate.
And the instruction that outranks all of the above: never code from a textbook. ICD-10-CM changes every October 1, CPT every January 1, HCPCS quarterly. Learn the structure here; get the codes from the current book.