Make Claude Cowork your medical bill clerk.
A practical system for the person holding a stack of bills, Explanations of Benefits and denial letters — the intake log, the dated deadline register and the appeal drafts — without taking a single decision, signature or phone call off you.
You: the patient who reads, signs and sendsCowork: the clerk that keeps the file
South Carolina’s Health Carrier External Review Act, S.C. Code § 38-71-1970, says to request an outside review within 60 days of receiving the denial. The federal rule says four months, and most guides print only that. File inside the earlier date.
The useful promise
You decide. Cowork keeps the file.
A medical bill is rarely one problem. It is a bill, an Explanation of Benefits that does not match it, a denial letter with a deadline buried in it, and three phone calls nobody wrote down.
Almost none of that is legal work. It is clerical work with deadlines attached, which is the worst combination there is: easy to lose, expensive to get wrong, and nobody teaches it to you before the envelope arrives. Claude Cowork is good at exactly this. It reads and writes inside one folder you choose, turns documents into records, counts a deadline from a date and shows the arithmetic, and tells you what is missing before a clock runs out rather than after.
What it cannot do is the part that carries weight. It cannot tell you the bill is wrong, that the denial was improper, or that you qualify for assistance. It cannot send an appeal, file a dispute, pay a fee or call anyone. Those are your acts, and the decisions behind them are yours too.
The operating loop
Six handoffs. One file that stays defensible.
You supply the facts, the judgment and the signature. Cowork turns those into an organized record on a cadence. Run it this way and an appeal is an evening’s work instead of a week of hunting for the letter.
Read the rules
Record the controlling rule, the issuer, the page, the URL and the date checked for every deadline you will rely on.
Sort the paper
Every document gets one line in the intake log: date on it, date you received it, who sent it, what it asks you to do and by when, in the document’s own words.
Name the plan
Employer plan, marketplace plan, self-funded or not, uninsured, nonprofit hospital or physician group. That decides which pathway’s clocks apply. Ask; never guess.
Anchor the dates
Every deadline is counted from the day you received the notice. If you do not know that day, the register says so and uses the earliest possible date.
Ask for the itemization
Request an itemized statement and the billing records. Cowork drafts the request. South Carolina has no confirmed itemized-bill statute, so it is a request, not a demand.
Audit
Recompute every date from its anchor. Report what is missing, what two documents disagree about, and what is due inside fourteen days. Ask for facts. Never fill a gap with a guess.
The folder is the case file
Give Cowork a narrow, legible workspace.
Case_[PROVIDER]_[YEAR]/ ├── 00_INBOX_not_yet_filed/ ├── 01_BILLS_itemized_and_summary/ ├── 02_EOBS/ ├── 03_DENIALS_with_received_dates/ ├── 04_DRAFTS_not_sent/ ├── 05_LETTERS_SENT_by_you/ ├── 06_CALLS_log/ ├── 07_DEADLINES_register_and_audits/ └── 99_REFERENCE_sources_with_dates/
Connect only this folder, never an entire home directory. Put a short operating memo at the top: who the patient is, the provider, the plan and whether it is fully insured or self-funded, and the list of actions that always need your approval.
Keep the source register beside it. Every time Cowork relies on a rule, it records the section, the URL and the date it was checked. Rules move, and a register is what makes stale guidance visible instead of invisible.
Do not put Social Security numbers in this folder. No passwords or portal logins, no card or routing numbers, no full account or policy numbers (the last four identify a claim well enough), no photos of your insurance ID card, and no unredacted identity documents. Redact before you save. Cowork sessions may process connected files on Anthropic’s servers.
Three prompts that install the clerk.
Use these as starting instructions and replace the bracketed fields. Keep every send, file and payment in manual-approval mode, always.
“Use only this folder. I am a patient in [COUNTY] County, South Carolina, with a bill from [PROVIDER] for services on [DATE]. My coverage is [EMPLOYER PLAN / MARKETPLACE PLAN / NONE]. Read every document in the inbox and write one line per document in an intake log: date on it, date I received it, who sent it, amount, and what it asks me to do and by when, in its own words. Do not tell me what I owe or whether anything is wrong. List the questions I should ask.”
“For each denial letter in this folder, ask me the date I received it. Then build a deadline register that counts the internal appeal window, the external review window and any other clock that applies to my kind of coverage, each with its rule, citation, URL and the date you checked it. Show the arithmetic. Where two sources disagree, show both. Do not tell me I have time. Tell me the earliest date and what is due first.”
“Draft an appeal letter for the denial dated [DATE] in my voice. Quote the plan’s stated reason. Leave bracketed fields for anything my doctor must supply. Do not assert a medical fact I have not given you. Add an enclosures checklist and save it in the drafts folder marked DRAFT – NOT SENT. I will read it, sign it and send it myself.”
The real automation
Make the record cheap to keep.
A good clerk does not fight your insurer. It makes the fight you are already having easy to see, check and file, so the dates are right and the letter is in your hand while there is still time to send it. Give Claude Cowork one narrow folder, the current rules with their dates, a weekly cadence and a hard approval boundary. You sign and you send. It keeps the record.
Charleston AI helps people in Charleston put an AI agent to work on a real job: ai-chs.com. Related: The Assessment Clerk, for the homeowner holding a property-tax notice.