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GrowInfectiousDisease

For ID physicians, group leaders and practice administrators

Make Your Independent Infectious Disease Practice Work Financially.

ID is a cognitive specialty carrying an infusion business. These are the tools, models and plain-English explainers for the economics nobody covered in fellowship — OPAT, buy-and-bill, coverage contracts, staffing and revenue cycle.

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An empty outpatient infusion suite, a row of reclining chairs beside a tall window in morning light.

An infusion suite before the first patient. A clinical service and a business unit, in the same room.

  • Free and ungated — no email for a result
  • Runs in your browser; nothing is stored
  • No invented rates or benchmarks

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What brought you here today?

Eight of the questions ID physicians, group leaders and practice administrators arrive with. Each one goes straight to the tool or explainer that answers it.

Tools

Model it with your own numbers

Calculators and assessments built for infectious disease decisions. Everything runs in your browser — nothing you enter is transmitted or stored.

All tools
CalculatorInteractive

Can Independent ID Work? Scenario Model

Test the levers side by side — adding an APP, opening infusion, changing hospital volume, shifting payer mix, adding a provider.

What it returns

Gross revenue

Direct cost

Contribution

Break-even volume

Open the calculator

Calculator

Independent ID Practice Economics Calculator

The whole practice in one model: office, hospital, APP and infusion revenue against staffing, drug and overhead cost.

Open the calculator

Calculator

Infusion & OPAT Economics Calculator

Drug acquisition, nursing, chair time, supplies and reimbursement across a full course of therapy — by site of care.

Open the calculator

On the numbers. Default values in every calculator are illustrative examples for demonstration — not validated reimbursement rates, costs or industry benchmarks. We do not publish figures we have not licensed and verified. Replace each field with your own practice’s data.

Browse by problem

Three places practice money is made or lost

An empty hospital ward corridor at night, lit by low overnight lighting.

01 / 03

Economics

Why productivity models mis-measure a cognitive specialty, how the four revenue streams differ, and pricing the institutional work that is currently given away.

Go to Economics
An IV pole and infusion bag standing beside an armchair in a domestic living room.

02 / 03

Infusion & OPAT

OPAT coverage asymmetry, infusion capacity and its real constraint, the roles that get left unfunded, and the referral-to-first-dose pathway.

Go to Infusion & OPAT
An opened medication shipping carton with a moulded foam insert and empty vial wells, on a dark desk.

03 / 03

RCM

Buy-and-bill on your balance sheet, authorisation as a financial control, under-levelling in the note, and underpayment you cannot see without contracts loaded.

Go to RCM

Start here

The infectious disease business questions people actually arrive with

A small practice office with two desks and a wall of empty open shelving, in bright morning light.
GuidePractice Growth

Starting an independent ID practice: designing the revenue model before day one

ID is a cognitive specialty with no procedural floor. Independent practice works when the revenue model is designed deliberately — consults, coverage contracts, outpatient clinic and an infusion or OPAT business, each priced separately.

  • Evaluation and management billing alone rarely supports an independent ID practice at typical consult volumes. The viable models combine clinical revenue with contracted services and an ancillary business.
  • Hospital coverage, stewardship and infection prevention are services with real value that are frequently delivered unpaid. If you are providing them, they belong in a contract.

15 min readRead

More from the library

All 13 resources
A hospital seminar room with rows of empty stacking chairs facing a lectern, in afternoon light through blinds.

Why you can use this

We would rather leave a number out than invent one

Physician-facing business content has a credibility problem, largely because so much of it is marketing with a citation glued on. Three of the rules this site is written under:

No invented figures
No reimbursement rates, margins, drug or equipment costs, denial rates or benchmarks are fabricated anywhere on this site.
Methodology in the open
Every tool publishes how it calculates — and what it deliberately does not account for.
Empty until verified
Benchmark tables ship with the metrics and definitions but no values, until we have licensed, sourced data.
Read all six editorial rules

Who publishes this

GrowInfectiousDisease is published by Persistex.

Persistex is a Massachusetts-based medical billing, coding and revenue cycle management firm working with independent practices across New England and nationwide. It funds this resource because practices that understand their own economics make better partners.

That relationship is deliberately visible rather than hidden. Nothing here is gated, no article is written to make a service look necessary, and no tool requires an email to return a result. If the site is only useful when it is selling something, it has failed at the thing it was built to do.

About & how this worksExplore Persistex

How you get from here to there

  1. 1You arrive with a specific practice problem.
  2. 2A resource or tool helps you understand it.
  3. 3You get a result you can act on — no email required.
  4. 4If you want help acting on it, Persistex is one click away.

Not: search → sales page → contact form.