CPT 78700Radiology

Kidney imaging morphol

CPT code 78700 covers nuclear medicine imaging of the kidneys to evaluate their shape, size, and structure. This test uses a small amount of radioactive material injected into the body to create detailed pictures of how the kidneys look.

Showing rates for

National Average

Base Medicare rate

$152.03

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

0.45

PE RVU (NF)

4.19

MP RVU

0.06

Total RVU

4.7

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

NCCI bundling edits

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Billing tips

Clearly document whether study is for morphology (78700) versus function (78701-78709) as these are mutually exclusive on same date of service
Impact: Prevents denials and audit flags; morphology vs function distinction affects $152.03 payment eligibility
Verify radiopharmaceutical used is appropriate for morphology imaging (typically Tc-99m DMSA or Tc-99m glucoheptonate) and document in medical record
Impact: Supports medical necessity and prevents downcoding; different agents may trigger review for alternate CPT codes
Bill professional and technical components separately (26/TC modifiers) when services are split between interpreting physician and imaging facility
Impact: Ensures accurate payment distribution; incorrect global billing can result in 100% overpayment recovery
Include diagnosis codes that clearly support morphology imaging indication such as suspected renal mass (D49.5), hydronephrosis (N13.30), or congenital anomaly (Q63.9)
Impact: Reduces medical necessity denials by 60-70% when diagnosis clearly justifies anatomical rather than functional assessment
Do not bill 78700 with same-day renal function studies (78701-78709) without modifier 59 and distinct documentation of separate clinical indications
Impact: Prevents automatic denial for bundling; separate documentation required to receive both payments totaling over $300
Submit claims within 30 days of service with complete imaging report including findings about kidney size, shape, position, and any structural abnormalities
Timely filing with complete documentation reduces claim adjudication time by 40% and audit risk significantly

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 78700 in 2025?

The 2025 Medicare national average reimbursement rate for CPT 78700 is $152.03 for both facility and non-facility settings. This rate is based on 4.7 total RVUs multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary by geographic locality.

What is the difference between CPT 78700 and 78701 for kidney imaging?

CPT 78700 covers kidney imaging focused on morphology (structure, size, shape, anatomical features), while 78701 covers kidney imaging with vascular flow assessment. Code 78700 is used when the clinical question concerns anatomy rather than blood flow or function. These codes should not typically be billed together on the same date without distinct documentation.

Can CPT 78700 be billed bilaterally for both kidneys?

No, CPT 78700 is inherently bilateral and includes imaging of both kidneys in the single code payment of $152.03. You cannot bill it twice or use modifier 50 for bilateral procedures. If only one kidney is imaged due to clinical circumstances (solitary kidney, transplant), use RT or LT modifier but expect the same payment amount.

What radiopharmaceutical agents are appropriate for billing CPT 78700?

CPT 78700 morphology imaging typically uses Tc-99m DMSA (dimercaptosuccinic acid) or Tc-99m glucoheptonate, which bind to renal cortical tissue to visualize kidney structure. Using agents designed for function or flow studies may trigger audit questions or denials, as different radiopharmaceuticals indicate different study types requiring different CPT codes.

How many RVUs is CPT code 78700 worth in 2025?

CPT 78700 has 4.7 total RVUs in 2025, broken down as: 0.45 work RVU, 4.19 practice expense RVU (both facility and non-facility), and 0.06 malpractice RVU. These values are from the CMS Medicare Physician Fee Schedule RVU25A released December 23, 2024.

What diagnosis codes support medical necessity for CPT 78700?

Diagnosis codes supporting 78700 include suspected renal mass (D49.5), hydronephrosis (N13.30), congenital kidney anomalies (Q63.x), renal agenesis evaluation (Q60.x), abnormal kidney imaging findings (R93.42), and structural abnormalities identified on other imaging requiring nuclear medicine confirmation. The diagnosis must justify anatomical assessment rather than functional evaluation.

Do I need modifier 26 or TC when billing CPT 78700?

Use modifier 26 for professional component only (physician interpretation) or modifier TC for technical component only (equipment, staff, supplies) when services are split between physician and facility. Bill globally without modifiers only when the same entity provides both components. Splitting incorrectly can result in overpayment recovery or underpayment.