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Billing code 99184: Neonatal hypothermiaMedicare rate & RVUs

Reports physician management of therapeutic hypothermia for an ill newborn, commonly during treatment of neonatal encephalopathy after perinatal hypoxia.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $184.04 for 99184 nationally in a facility.

Medicare rate · 99184

Neonatal hypothermia

Swap in your local Medicare rate.

Work RVUs
4.39
Total RVUs
5.51
Global days
XXX

National rate · 2026

$184.04

Facility setting, before claim adjustments.

See every locality for 99184 → · Billed by an NP, PA or therapist? →

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

On this page 10 sections
  1. Medicare rate
  2. What 99184 covers
  3. By payment locality
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Similar codes
  8. Related codes
  9. Billing questions
  10. Sources

What 99184 covers

This code describes physician management of therapeutic cooling for an ill newborn. A typical clinical setting is a neonatal intensive care unit treating an infant with hypoxic-ischemic encephalopathy after a complicated delivery. The neonatologist or another qualified physician manages the cooling treatment and the infant’s clinical response; the code is not for routine temperature control or simply placing the infant on a cooling device.

The record should support the medical reason for cooling and the provider’s management of that treatment, including relevant temperature and clinical monitoring. Report the service only when the physician’s work specifically includes management of therapeutic hypothermia. CMS fee schedule data assigns work, practice-expense, and malpractice RVUs to the service. When neonatal critical care is also reported, documentation should distinguish the hypothermia management from the separately reported critical care service.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

Where 99184 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

99184 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$176.27
Alaska*Unavailable$254.64
ArizonaUnavailable$181.75
ArkansasUnavailable$175.32
AtlantaUnavailable$186.93
AustinUnavailable$184.78
BakersfieldUnavailable$185.54
Baltimore/Surr. CntysUnavailable$190.76
BeaumontUnavailable$180.86
BrazoriaUnavailable$182.76

99184 rates by state

Office rate range in each state. Select a state to see its payment localities.

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

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Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

View every state and territory as a table
99184 office rate range by state
State / territoryOffice rate rangeLocalities
AKNo published base rate1
ALNo published base rate1
ARNo published base rate1
AZNo published base rate1
CANo published base rate29
CONo published base rate1
CTNo published base rate1
DCNo published base rate1
DENo published base rate1
FLNo published base rate3
GANo published base rate2
GUNo published base rate1
HINo published base rate1
IANo published base rate1
IDNo published base rate1
ILNo published base rate4
INNo published base rate1
KSNo published base rate1
KYNo published base rate1
LANo published base rate2
MANo published base rate2
MDNo published base rate3
MENo published base rate2
MINo published base rate2
MNNo published base rate1
MONo published base rate3
MSNo published base rate1
MTNo published base rate1
NCNo published base rate1
NDNo published base rate1
NENo published base rate1
NHNo published base rate1
NJNo published base rate2
NMNo published base rate1
NVNo published base rate1
NYNo published base rate5
OHNo published base rate1
OKNo published base rate1
ORNo published base rate2
PANo published base rate2
PRNo published base rate1
RINo published base rate1
SCNo published base rate1
SDNo published base rate1
TNNo published base rate1
TXNo published base rate8
UTNo published base rate1
VANo published base rate2
VINo published base rate1
VTNo published base rate1
WANo published base rate2
WINo published base rate1
WVNo published base rate1
WYNo published base rate1

How the 99184 rate is calculated

Each of 99184’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

How the rate is built · 99184

RVUs × geographic indexes × conversion factor

Swap in your local Medicare rate.

Work 4.39Practice expense 0.82Malpractice 0.30

5.5100 adjusted RVUs×$33.4009 conversion factor=$184.04

All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.

Payment rules and modifiers for 99184

99184 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.

Place of service · 99184

Which rate does Medicare pay?

The POS code on the claim line (CMS-1500 box 24B).

Non-facility (office) rate · national

—

99184 isn’t priced in this setting.

99184 compared with similar codes

Compare codes

99184 vs 99116 vs 99468 vs 99469: national Medicare rates

Swap in your local Medicare rate.

  • 99184
    Neonatal hypothermia · 4.39 wRVU
    —
  • 99116
    · 0 wRVU
    —
  • 99468
    Neonatal critical care · 18.46 wRVU
    —
  • 99469
    Neonatal critical care · 7.99 wRVU
    —

How to choose

99116Anes comp tot bdy hypthrm
99116 describes total-body hypothermia as an anesthesia circumstance. Use 99184 for physician management of therapeutic cooling in an ill neonate.
99468Neonatal critical care
99468 represents initial neonatal critical care, while 99184 identifies management of therapeutic hypothermia. The services require distinct documentation when both are reported.
99469Neonatal critical care
99469 represents subsequent neonatal critical care; 99184 concerns therapeutic cooling management rather than the overall subsequent critical care service.

Codes related to 99184

Related codes aren’t interchangeable: bill the code that matches the service performed.

Codes related to 99184
CodeHow it relatesNational office range
Often billed with
99468Neonatal critical careInitial neonatal critical care may occur during the same encounter; document each service distinctly.No office rate
99469Neonatal critical careSubsequent neonatal critical care may occur during ongoing cooling management; support each service separately.No office rate
99465Newborn resuscitationNewborn resuscitation may precede cooling during the same delivery-related encounter.No office rate

99184 billing questions

When should this code be selected instead of neonatal critical care?

Use this code for physician management of therapeutic cooling itself. Neonatal critical care codes describe the broader critical care service; documentation should show the distinct work for each reported service.

Does placing a newborn on a cooling device support this code?

Device placement alone is not the service described here. The record should support physician management of therapeutic hypothermia and the infant’s response to treatment.

Can this be reported with a neonatal critical care code?

The services may occur during the same encounter. Document the therapeutic hypothermia management separately from the work supporting neonatal critical care.

How does this differ from anesthesia-related hypothermia coding?

This code concerns therapeutic cooling management for an ill neonate. Code 99116 concerns total-body hypothermia as an anesthesia circumstance, not neonatal treatment of encephalopathy.

What clinical documentation is most useful?

Record the indication for cooling, the provider’s management, and relevant temperature and clinical monitoring. A device log without documentation of physician management does not establish the service.

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Show the CMS file lines behind this rate
RVUs for 99184PPRRVU2026_Oct_nonQPP.csv, line 13,002 (RVU26D)

Open CMS sourceHow we calculate rates

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