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Creatine kinase (CK), also referred to as creatine phosphokinase (CPK), is an important enzyme that plays a critical role in energy production within various tissues of the body, particularly in the heart, brain, and skeletal muscle. This enzyme exists in different isoenzymes, which are specific forms of the enzyme that are found in distinct tissues. The primary isoenzymes include CK-MM, predominantly located in skeletal and heart muscle, CK-MB, which is primarily found in heart muscle, and CK-BB, located in the brain. In the bloodstream, CK levels are typically composed of CK-MM and CK-MB, with CK-BB being present only in minimal amounts. Elevated levels of CK in the blood can indicate damage to muscle tissues, such as that which occurs during a heart attack (myocardial infarction) or following skeletal muscle injury due to trauma or intense physical activity. Additionally, certain medications, such as statins used to lower cholesterol, as well as alcohol consumption, can lead to increased CK levels in the blood. The CPT® Code 82552 specifically pertains to the measurement of CK isoenzyme levels, which is crucial for pinpointing the exact location of muscle damage when total CK levels are elevated. This testing is performed on a blood specimen obtained through venipuncture, and the serum is analyzed using quantitative enzymatic methodology to provide accurate results regarding the isoenzyme levels present in the sample.
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The measurement of creatine kinase (CK) isoenzymes is indicated in various clinical scenarios where muscle damage is suspected. The following conditions may warrant this testing:
The procedure for measuring creatine kinase (CK) isoenzymes involves several key steps, which are outlined below:
After the procedure, the patient may experience minimal discomfort at the venipuncture site, which typically resolves quickly. There are no specific post-procedure care instructions required for this test, but patients should be advised to report any unusual symptoms or prolonged discomfort. The results of the CK isoenzyme test will be interpreted by the healthcare provider in conjunction with the patient's clinical history and other diagnostic findings to determine the presence and extent of muscle damage.
| Short Descr | ASSAY OF CPK IN BLOOD | Medium Descr | CREATINE KINASE ISOENZYMES | Long Descr | Creatine kinase (CK), (CPK); isoenzymes | Status Code | Statutory Exclusion (from MPFS, may be paid under other methodologies) | Global Days | XXX - Global Concept Does Not Apply | PC/TC Indicator (26, TC) | 9 - Not Applicable | Multiple Procedures (51) | 9 - Concept does not apply. | Bilateral Surgery (50) | 9 - Concept does not apply. | Physician Supervisions | 09 - Concept does not apply. | Assistant Surgeon (80, 82) | 9 - Concept does not apply. | Co-Surgeons (62) | 9 - Concept does not apply. | Team Surgery (66) | 9 - Concept does not apply. | Diagnostic Imaging Family | 99 - Concept Does Not Apply | CLIA Waived (QW) | No | APC Status Indicator | Conditionally packaged laboratory tests | Type of Service (TOS) | 5 - Diagnostic Laboratory | Berenson-Eggers TOS (BETOS) | T1H - Lab tests - other (non-Medicare fee schedule) | MUE | 3 | CCS Clinical Classification | 233 - Laboratory - Chemistry and Hematology |
| 90 | Reference (outside) laboratory: when laboratory procedures are performed by a party other than the treating or reporting physician or other qualified health care professional, the procedure may be identified by adding modifier 90 to the usual procedure number. | 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. | 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. | GA | Waiver of liability statement issued as required by payer policy, individual case | GV | Attending physician not employed or paid under arrangement by the patient's hospice provider | GW | Service not related to the hospice patient's terminal condition | Q1 | Routine clinical service provided in a clinical research study that is in an approved clinical research study | Q4 | Service for ordering/referring physician qualifies as a service exemption | 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 | XU | Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service |
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| Pre-1990 | Added | Code added. |
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