John Cruz — Nurse. Systems mapper. Quality architect.
I map how the kidney care system actually works — the care, the money, the rules, and how they connect — and make it legible to the people inside it.
Every Seat
I've worked nearly every tier of dialysis — technician, nurse, charge nurse, manager, medical-device sales, and now quality and safety. Moving across those seats is what let me see the common denominators: the same problems wearing different clothes depending on where you're standing.
Make It Understandable
I like solving problems, and I like making complicated things make sense. Most of what's broken in this system isn't hidden — it's just illegible.
Show the Work
Every claim I publish carries its source and the date I last checked it. When I get something wrong, the correction is public and logged. And every map is generated from one verified dataset, so the picture can't quietly drift from the facts underneath it. Showing the work isn't a disclaimer — it's the discipline that makes the work worth trusting.
Working as Designed
The outcomes aren't accidents. The system produces exactly what its incentives are built to produce — so I read the design, not the people. Most of the harm isn't anyone being wrong; it's everyone optimizing locally for the part they can see.
The treatment in front of me — needle placement, machine parameters, the full prescribed time, so lab day tells the truth.
Anything above the unit. I didn’t know the Conditions for Coverage existed.
I was a tech in one of those clinics when my license came through. Promoted in the building.
My section and everyone in it — delegation, medications, catheter care, infection surveillance. In acute, whatever the patient walked in with, alone at the bedside with no second nurse coming.
Continuity. Wider reach, less person; in acute you treat someone once and never see them again.
One of these units I staffed first and came back later to run.
Every patient on the shift, the staff, the manager looking to me. The whole floor was my problem, not my section.
Where the structure came from — who above the floor decides how a unit runs, or why.
Years later, four sites of this organization would land in my sales book.
The first time, I was pushed in early and learned that being good at the work is very different from managing people. I stepped back to the floor, and went deep on leadership after.
Why they call it middle management — squeezed between the floor you have to understand and the leadership you answer to.
How far the chain runs above you.
I came back to run the unit I once worked.
The unit from outside, across nine of them. Even the best solution asks people to trade problems they have mastered for new ones — no sale skips that.
The full picture. I was incentivized for adoption, not for what the unit carried after I left.
All nine came with me into the manager’s book.
The region — how programs differ hospital to hospital across the hardest room I have sold into. Selling there took clinical credibility and commercial fluency in the same person. I was carrying both.
The inside of the accounts. A book that wide is held through your reps — you see the coverage, not the chair.
All nine rep accounts, still in the book. And four sites of the organization I once charged in — covered from the outside this time.
No orders to follow — the first seat where the problem arrives with no protocol attached. I look for the constraints first, then build inside them.
The chair. I am further from the bedside than I have ever been — the seat that finally sees the whole system is the seat that stopped touching it.
The Conditions for Coverage I didn’t know existed in 2011 are what I work inside every day.
Fifteen years. I didn't specialize down one lane — I went across. That line is the qualification.
A public atlas of how the U.S. dialysis system connects: care, money, regulation, and accountability. Built so the people inside it and the people governing it can finally see the same picture.
→ the-access.coThe verified dataset underneath The Access — 47 entities, 62 relationships. One data model; every plate is generated from it, so the map and the data can never drift apart. It's also the field you're standing in: the constellation behind this page is that dataset, drawn live.
47 ENTITIES · 62 RELATIONSHIPS · ONE MODELWhat happens to a patient?
PL·01The CrossroadsPL·02The BorderPL·03The Transplant MapWhat governs a facility?
PL·04The CrosswalkHow is care measured and judged?
PL·05The Two LaddersPL·06The Benchmark PipelinePL·07The DrawsHow does the money move?
PL·08The Money FlowPL·09The Coverage MapWho's involved, and how does the data connect them?
PL·10The Stakeholder MatrixPL·11The Data MapWhen is everything due?
PL·12The Regulatory Year-WheelThe long-form read: how the U.S. dialysis system actually fits together, written from inside it.
→ the-access.co/essayAn academic medical center. Governance architecture, quality infrastructure, and survey readiness for a home-dialysis program.
If this maps to something you're carrying
If you run a program, work the floor, or govern a piece of this system — and something I've mapped speaks to a problem you're sitting with, or you just want to think out loud about how a piece of it actually works — I'd want to hear from you.
John Cruz · Queens, New York