CPT 90970 reports end-stage renal disease (ESRD) related physician services for a home dialysis patient aged 20 or older, for less than a full month of service, billed per day. It belongs to the monthly capitation payment (MCP) code family (90951–90970) that pays nephrologists for ongoing ESRD management: 90951–90962 cover in-center patients by age and visit count, 90963–90966 cover home dialysis patients for a full month by age, and 90967–90970 are the per-day codes used when a home dialysis patient does not receive a full month of ESRD management — with 90970 as the adult (20 and older) daily code.
Use 90970 when the adult home dialysis patient’s month is partial: the patient started or stopped home dialysis mid-month, transferred between practices or dialysis modalities, received a kidney transplant, was hospitalized for part of the month, or died during the month. Bill one unit for each day of the month the nephrologist was responsible for the patient’s outpatient home dialysis management, excluding the days carved out by the triggering event — for example, inpatient days are removed from the outpatient MCP day count, and per CMS rules hospitalization splits the month into per-day billing rather than the full-month code.
Do not use 90970 when the patient was on home dialysis under the same physician’s management for the entire calendar month — that is the full-month code for the patient’s age (90966 for 20 and older). Do not bill it for in-center hemodialysis patients; partial-month in-center scenarios have their own rules within 90951–90962 and the daily codes for that setting. Do not count inpatient days as MCP days, and do not bill 90970 for the same days another nephrologist is billing ESRD management for the patient. Age matters: patients under 20 use 90967 (under 2), 90968 (2–11), or 90969 (12–19) instead, and the younger-age codes carry different clinical expectations.
The record should establish the physician’s ESRD management for the billed period — dialysis prescription oversight, review of home treatment data and labs, and management of the dialysis course — plus clear dating of the event that made the month partial: the start date of home training or home dialysis, admission and discharge dates, transplant date, transfer date, or date of death. The claim’s unit count must reconcile to the calendar: the number of days billed at 90970 should match the outpatient days under that physician’s care, and payers audit unit counts against hospitalization records.
When the home dialysis patient is hospitalized during the month, the outpatient ESRD management no longer covers a complete month, so the nephrologist bills 90970 per day for the outpatient days before and after the stay and excludes the inpatient days. Services during the admission are billed under inpatient E/M or dialysis procedure codes as applicable.
One unit per eligible outpatient day of ESRD home dialysis management by the billing physician in that calendar month. Days in hospital, days before home dialysis began, days after transplant or death, and days under another physician’s ESRD billing are excluded.
No — they are alternatives for the same patient-month. A full month of home dialysis management is 90966; anything less converts the entire month to per-day billing with 90970. Billing both duplicates the capitation.
Yes. The home dialysis MCP codes cover home modalities generally — home hemodialysis and peritoneal dialysis (CAPD/CCPD) alike. What determines the code is the home setting, the patient’s age, and whether the month was full or partial.
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