CPT 99478E&M

Ic lbw inf < 1500 gm subsq

CPT 99478 covers daily intensive care services for very small premature or critically ill newborns weighing less than 1500 grams (about 3.3 pounds) after their first day of life.

Showing rates for

National Average

Base Medicare rate

$126.80

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

2.75

PE RVU (NF)

0.99

MP RVU

0.18

Total RVU

3.92

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Bill 99478 only once per calendar day per physician, regardless of number of encounters or time spent with the patient
Impact: Prevents automatic denials for duplicate billing; each attending can only bill one unit per day at $126.80
Verify infant's current weight is still <1500g or use date of birth weight if billing for present body weight category throughout hospitalization per payer policy
Impact: Using incorrect weight category (e.g., billing 99479 when 99478 is appropriate) can result in underpayment of $20-40 per day
Document all critical care elements including specific interventions, monitoring parameters, time spent in care coordination, and changes in management plan
Impact: Insufficient documentation is the #1 cause of downcoding to lower-level E/M codes, representing potential loss of $80-100 per day
Do not bill 99478 on the same day as the initial intensive care code 99477; use 99478 starting day 2 of care
Impact: Billing both codes creates an edit conflict resulting in automatic denial of 99478 ($126.80 loss)
When multiple physicians from same group practice provide care, only the physician of record should bill the daily intensive care code
Impact: Prevents duplicate billing denials and potential fraud allegations; coordinate with group members to designate single biller
Separately bill and document procedures performed (intubation, line placement, lumbar puncture) with appropriate CPT codes and modifier 25 on the E/M when necessary
Impact: Failure to bill separately billable procedures can result in $100-500 loss per procedure; proper modifier use ensures both services are paid

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Frequently asked questions

What is the difference between CPT 99478 and 99479?

CPT 99478 is for subsequent intensive care of infants weighing less than 1500 grams, while 99479 is for infants between 1500-2500 grams. The weight category determines which code to use, and 99478 has a higher reimbursement rate reflecting the greater intensity of care required for smaller infants.

How much does Medicare pay for CPT 99478 in 2025?

The 2025 Medicare national average payment for CPT 99478 is $126.80 for both facility and non-facility settings, based on 3.92 total RVUs and a conversion factor of 32.3465. Actual payment may vary by geographic locality.

Can CPT 99478 be billed more than once per day?

No, CPT 99478 should only be billed once per calendar day per physician, regardless of how many times the physician sees or evaluates the infant during that day. It is a per-day service code, not a per-encounter code.

What documentation is required to bill CPT 99478?

Documentation must include the infant's weight confirming <1500g category, gestational age, comprehensive examination, assessment of all systems, review of diagnostics, current treatment plan, and evidence of intensive monitoring. The note must demonstrate medical necessity for NICU-level care.

Do you use birth weight or current weight for CPT 99478?

Payer policies vary, but most allow using the birth weight to determine the appropriate code category throughout the infant's hospitalization. Verify specific payer guidelines, as some may require current weight. Consistency in approach and clear documentation is essential.

Can multiple physicians bill CPT 99478 for the same patient on the same day?

Generally no. Only one physician should bill 99478 per patient per calendar day, typically the attending of record. In group practices, physicians should coordinate to ensure only one provider bills the daily intensive care code to avoid duplicate billing denials.

What is the RVU value for CPT code 99478?

CPT 99478 has a total RVU of 3.92 for 2025, consisting of 2.75 work RVUs, 0.99 practice expense RVUs, and 0.18 malpractice RVUs. These values are the same for both facility and non-facility settings.