Hip or Knee Replacement: what it covers and what it costs

What a Hip/Knee Replacement price actually covers

Major joint replacement of the hip or the knee — the damaged joint is replaced or resurfaced with prosthetic components. Hospitals bill both operations through the same inpatient code pair, MS-DRG 469 and 470, which is why one published rate covers either. Between them they are among the highest-volume major operations performed in the United States.

Code scope. MS-DRG 469 and 470 cover major hip AND knee joint replacement together. The code pair cannot distinguish a hip replacement from a knee replacement, so a hospital's published rate applies to both and this site prices them on one page rather than implying a difference the data does not contain.

What is — and isn't — in the price

Inpatient pricing is grouped: a single hospital amount covers the operating room, the implant, room and board and routine care for the stay. The surgeon's fee and anaesthesia sit outside it and arrive as separate bills. Physical therapy or rehabilitation after discharge — a substantial part of recovery for either joint — is billed separately by whoever provides it.

Why Hip/Knee Replacement prices differ so much between hospitals

The grouped rate depends heavily on whether the stay is classified with or without major complications: DRG 469 is the with-complications version and 470 the without, and the assignment is made after the fact. The implant is a large share of hospital cost and varies by manufacturer, model and bearing surface. Both operations are increasingly performed as outpatient procedures, which is a different billing pathway again. Because the code pair does not separate hip from knee, a hospital reporting a single figure here is reporting it for both.

What else usually lands on the bill

Pre-operative X-rays or templating imaging, laboratory work and a medical clearance visit precede the admission and are billed separately. Skilled nursing or home health after discharge, and outpatient physical therapy, are all separate and can rival the surgical charge over a full recovery. Where a walker, raised toilet seat or other durable medical equipment is supplied, that is billed by a supplier.

What to ask before you book

Ask whether the published figure is the uncomplicated grouping (DRG 470) rather than the complicated one, whether it includes the implant, and — because this code does not distinguish the two joints — confirm with the hospital that the quote applies to the specific operation planned. Get a separate estimate for post-discharge rehabilitation, which is where totals most often exceed expectations.

Where the money actually moves

Grouped inpatient pricing leaves little to negotiate on the day, so the saving comes from choosing the facility beforehand and planning rehabilitation. Ask whether a short-stay or outpatient joint replacement programme is clinically appropriate — it prices through a different pathway entirely.