Coding Ahead
CasePilot
Medical Coding Assistant
Case2Code
Search and Code Lookup Tool
RedactPHI
HIPAA-Compliant PHI Redaction
DetectICD10CM
ICD-10-CM Code Detection
Log in Register free account
1 code page views remaining. Guest accounts are limited to 1 page view. Register free account to get 5 more views.
Log in Register free account

Official Description

Bone and/or joint imaging; 3 phase study

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Bone and/or joint imaging using a three-phase study, designated by CPT® Code 78315, is a diagnostic procedure that employs scintigraphy along with a radiolabeled isotope tracer to visualize and assess the condition of bones and joints. This imaging technique is particularly valuable in the diagnosis of conditions such as osteomyelitis, which is an infection of the bone, and fractures that may not be easily identifiable through standard imaging methods. The procedure begins with the establishment of an intravenous line, through which the radiolabeled isotope tracer is injected directly into the patient's circulatory system. This tracer allows for the visualization of blood flow and metabolic activity in the bones and joints. In cases where inflammation is suspected, a blood sample is drawn from the patient and processed to separate white blood cells (WBCs). These WBCs are then tagged with a radioactive calcium isotope and reintroduced into the patient’s body. The imaging process is divided into three distinct stages: Stage I, known as the nuclear angiogram or flow stage, captures images within the first 2 to 5 seconds post-injection, providing immediate insights into blood flow. Stage II, or the blood pool stage, involves imaging 5 minutes after the injection, allowing for the assessment of blood pooling in the affected area. Finally, Stage III, referred to as the delayed stage, captures images 2 to 3 hours after the injection, which is particularly useful for identifying chronic or partially treated pathologies. During the procedure, the patient is positioned on an imaging table, and a gamma camera is placed over the area of interest. The scanning is conducted at specific intervals corresponding to each stage, and the radioactive energy emitted from the tracer is converted into detailed images. The physician is responsible for interpreting the results of the three-phase bone and/or joint imaging study and will provide a comprehensive written report detailing the findings, which aids in the diagnosis and management of the patient's condition.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The three-phase bone and/or joint imaging study is indicated for various clinical scenarios where detailed visualization of bone and joint conditions is necessary. The following conditions may warrant the use of this imaging technique:

  • Osteomyelitis - This imaging is crucial for diagnosing bone infections, allowing for the identification of areas affected by inflammation and infection.
  • Fractures - It assists in detecting fractures that may not be visible on standard X-rays, particularly in complex cases.
  • Inflammatory conditions - Conditions that involve inflammation in the bones or joints can be evaluated effectively using this imaging method.
  • Assessment of chronic conditions - The delayed imaging stage is particularly useful for identifying chronic or partially treated pathologies that may not be apparent in the early stages.

2. Procedure

The procedure for three-phase bone and/or joint imaging involves several critical steps that ensure accurate and effective imaging of the targeted area. The following steps outline the process:

  • Step 1: Establishing intravenous access - An intravenous line is established to facilitate the injection of the radiolabeled isotope tracer directly into the patient's circulatory system. This step is essential for ensuring that the tracer is delivered effectively for imaging purposes.
  • Step 2: Injection of the radiolabeled isotope tracer - The radiolabeled isotope tracer is injected through the established intravenous line. This tracer is crucial for highlighting areas of interest in the bones and joints during the imaging process.
  • Step 3: Blood sample collection (if inflammation is suspected) - If there is a suspicion of inflammation, a blood sample is drawn from the patient. This sample is then centrifuged to separate the white blood cells, which are subsequently tagged with a radioactive calcium isotope.
  • Step 4: Imaging stages - The imaging is conducted in three distinct stages:
    • Stage I (Nuclear Angiogram or Flow Stage) - Images are obtained within the first 2 to 5 seconds after the injection, capturing immediate blood flow to the area.
    • Stage II (Blood Pool Stage) - Images are taken 5 minutes post-injection, allowing for the assessment of blood pooling in the affected area.
    • Stage III (Delayed Stage) - Images are captured 2 to 3 hours after the injection, which is particularly useful for identifying chronic or partially treated pathologies.
  • Step 5: Positioning and scanning - The patient is positioned on the imaging table with the gamma camera placed over the area of interest. Scanning is performed at specific intervals corresponding to each imaging stage, and the emitted radioactive energy is converted into images for analysis.
  • Step 6: Interpretation and reporting - After the imaging is completed, the physician interprets the results of the three-phase study and provides a detailed written report of the findings, which is essential for guiding further clinical management.

3. Post-Procedure

Post-procedure care for patients undergoing three-phase bone and/or joint imaging typically involves monitoring for any immediate reactions to the radiolabeled isotope tracer. Patients may be advised to hydrate adequately to help flush the tracer from their system. There are generally no significant restrictions following the procedure, and patients can resume normal activities unless otherwise directed by their physician. The results of the imaging study will be reviewed by the physician, who will discuss the findings and any necessary follow-up actions or treatments based on the results.

Short Descr BONE IMAGING 3 PHASE
Medium Descr BONE &/JOINT IMAGING 3 PHASE STUDY
Long Descr Bone and/or joint imaging; 3 phase study
Status Code Active Code
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 1 - Diagnostic Tests for Radiology Services
Multiple Procedures (51) 0 - No payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 0 - Payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Procedure or Service, Not Discounted when Multiple
ASC Payment Indicator Radiology service paid separately when provided integral to a surgical procedure on ASC list; payment based on OPPS relative payment weight.
Type of Service (TOS) 4 - Diagnostic Radiology
Berenson-Eggers TOS (BETOS) I1E - Standard imaging - nuclear medicine
MUE 1
CCS Clinical Classification 207 - Radioisotope bone scan
26 Professional component: certain procedures are a combination of a physician or other qualified health care professional component and a technical component. when the physician or other qualified health care professional component is reported separately, the service may be identified by adding modifier 26 to the usual procedure number.
X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician
GC This service has been performed in part by a resident under the direction of a teaching physician
MG The order for this service does not have applicable appropriate use criteria in the qualified clinical decision support mechanism consulted by the ordering professional
MH Unknown if ordering professional consulted a clinical decision support mechanism for this service, related information was not provided to the furnishing professional or provider
ME The order for this service adheres to appropriate use criteria in the clinical decision support mechanism consulted by the ordering professional
TC Technical component; under certain circumstances, a charge may be made for the technical component alone; under those circumstances the technical component charge is identified by adding modifier 'tc' to the usual procedure number; technical component charges are institutional charges and not billed separately by physicians; however, portable x-ray suppliers only bill for technical component and should utilize modifier tc; the charge data from portable x-ray suppliers will then be used to build customary and prevailing profiles
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
CR Catastrophe/disaster related
FY X-ray taken using computed radiography technology/cassette-based imaging
GA Waiver of liability statement issued as required by payer policy, individual case
GW Service not related to the hospice patient's terminal condition
LT Left side (used to identify procedures performed on the left side of the body)
MA Ordering professional is not required to consult a clinical decision support mechanism due to service being rendered to a patient with a suspected or confirmed emergency medical condition
MB Ordering professional is not required to consult a clinical decision support mechanism due to the significant hardship exception of insufficient internet access
MC Ordering professional is not required to consult a clinical decision support mechanism due to the significant hardship exception of electronic health record or clinical decision support mechanism vendor issues
MF The order for this service does not adhere to the appropriate use criteria in the clinical decision support mechanism consulted by the ordering professional
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
QQ Ordering professional consulted a qualified clinical decision support mechanism for this service and the related data was provided to the furnishing professional
RT Right side (used to identify procedures performed on the right side of the body)
UD Medicaid level of care 13, as defined by each state
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
Date
Action
Notes
2011-01-01 Changed Short description changed.
2009-01-01 Changed Code description changed
Pre-1990 Added Code added.
Code
Description
Code
Description
Code
Description
Code
Description
CasePilot

Get instant expert-level medical coding assistance.

Ask about:
CPT Codes Guidelines Modifiers Crosswalks NCCI Edits Compliance Medicare Coverage
Example: "What is CPT code 99213?" or "Guidelines for E/M services"