CPT 01112: Anesthesia for Bone Marrow Aspiration/Biopsy at Iliac Crest
CPT code 01112 denotes anesthesia services for bone marrow aspiration, biopsy, or both at the anterior or posterior iliac crest. This code identifies the anesthesia component of procedures that sample marrow for diagnostic or therapeutic purposes and is relevant across hospital and ambulatory procedural settings. Accurate use of this code affects national claims capture for anesthesia resource utilization, quality measurement, and aggregated service counts for hematology and oncology procedures.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find context on the clinical scenario tied to the code, comparisons to related anesthesia procedure codes, and guidance on where this service typically occurs. The publication summarizes common documentation elements and coding relationships that influence billing classification and claims processing for bone marrow procedures.
This resource is intended for coding professionals, anesthesia providers, and revenue cycle staff seeking a concise reference to the clinical definition, expected setting, and payer coverage context for CPT code 01112. Data not available in the input is explicitly noted where applicable.
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Billing Code Overview
CPT code 01112 describes anesthesia services provided for bone marrow aspiration and/or biopsy. The procedure is performed at the anterior or posterior iliac crest. The service type is anesthesia for bone marrow aspiration and/or biopsy, and the typical site of service is an operating room or procedure suite where anesthesia services are delivered for iliac crest bone marrow procedures.
Clinical & Coding Specifications
Clinical Context
A 68-year-old female with known osteoporosis presents with progressive pelvic pain and limited mobility after a low-energy fall. Imaging demonstrates a suspicious lytic lesion in the right iliac crest with concern for metastatic disease versus primary bone tumor. The orthopedic oncology team schedules a bone marrow aspiration and core biopsy of the anterior iliac crest to obtain diagnostic tissue and marrow for histopathology, flow cytometry, and cultures.
Pre-procedure workflow includes informed consent, review of anticoagulation, basic labs (CBC, coagulation panel), and assessment by the anesthesia team. The anesthesia provider (anesthesiologist, CRNA, or anesthesiology assistant) performs a focused pre-anesthesia evaluation in pre-op holding, documents airway and ASA physical status (P3 for a patient with severe systemic disease), and selects monitored anesthesia care or general anesthesia as indicated. In the operating room or procedure suite, standard monitors are applied; intravenous access is confirmed; local skin anesthesia is administered at the iliac crest biopsy site; sedation or general anesthesia is provided per the anesthesia plan; the interventionalist performs the bone marrow aspiration and core biopsy from the anterior iliac crest. Post-procedure, the anesthesia provider documents emergence, pain control, and immediate recovery status prior to transfer to PACU or observation. Documentation includes the administered anesthetic agents, airway management technique, sedation level, intra-procedural events, and any modifier-relevant circumstances (for example, use of 23 for unusual postoperative services or 22 for increased procedural services when applicable).
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when anesthesia services required substantially greater effort or time than typical for iliac crest bone marrow biopsy anesthesia (document justification). |
23 | Unusual anesthesia for emergency situations | Use when anesthesia is provided for an emergency procedure that is normally elective. |
50 | Bilateral procedure | Use when bilateral iliac crest biopsies are performed and payer allows bilateral reporting. |
52 | Reduced services | Use when the anesthesia service is partially reduced or curtailed. |
53 | Discontinued procedure | Use when the anesthesia-administered procedure is terminated before completion for medical reasons. |
54 | Surgical care only | Not typically appended to anesthesia codes; included for team contexts when applicable to surgical reporting. |
55 | Postoperative management only | Use when the reporting provider only provided postoperative care (rare for anesthesia CPT billing). |
62 | Two surgeons/Team approach | Use when the procedure required a co-surgeon team impacting anesthesia planning. |
78 | Unplanned return to OR following initial procedure | Use when anesthesia is required for an unplanned return for related procedure in the global period. |
AA | Anesthesia provided personally by anesthesiologist | Use when the physician anesthesiologist personally furnishes the anesthesia service. |
AD | Medical supervision by anesthesiologist, medically directed CRNA | Use when an anesthesiologist medically directs a CRNA for the case. |
QK | Medical direction of two, three, or four CRNAs | Use when the physician provides medical direction to multiple CRNAs for concurrent cases. |
QX | CRNA service with medical direction by a physician | Use when a CRNA performs the anesthesia under physician direction. |
QS | Monitored anesthesia care (MAC) service | Use when MAC is provided and reported per payer rules. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207L00000X | Anesthesiology | Physician anesthesiologists who personally provide or direct anesthesia services for biopsy procedures. |
367500000X | Certified Registered Nurse Anesthetist | CRNAs who provide MAC or general anesthesia for bone marrow aspiration/biopsy. |
207RA0401X | Anesthesiology Assistant | Anesthesiology assistants who work under physician anesthesiologist supervision in the peri-procedural setting. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
S32.9XXA | Fracture of unspecified part of lumbar spine and pelvis, initial encounter | Pelvic fractures may prompt bone marrow aspiration/biopsy when malignancy or marrow pathology is suspected or to evaluate fracture etiology. |
M84.459A | Pathological fracture in neoplastic disease, pelvis, initial encounter | Pathologic pelvic fractures from metastatic disease often require biopsy to confirm malignancy and guide oncologic management. |
M87.051 | Idiopathic aseptic necrosis of pelvis | Avascular necrosis of pelvic bone can present with pain and may necessitate biopsy when diagnosis is uncertain. |
M80.059A | Age-related osteoporosis with current pathological fracture, pelvis, initial encounter | Osteoporotic pelvic fractures may be evaluated with biopsy when there is concern for underlying secondary causes. |
S32.2XXA | Fracture of coccyx, initial encounter | Coccygeal fractures adjacent to the pelvis can prompt evaluation of pelvic bone health and consideration of marrow sampling if clinically indicated. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
00912 | Anesthesia for transurethral procedures (including urethrocystoscopy); transurethral resection of bladder tumor(s) | Unrelated anatomy but listed among anesthesia codes for facility scheduling or anesthesia service grouping; not typically used for iliac crest biopsy. |
01173 | Anesthesia for open procedures involving upper 2/3 of femur; amputation | Related as an anesthesia code covering proximal lower extremity open orthopedic procedures; used when broader lower pelvic/femoral surgery is performed in same operative episode. |
01200 | Anesthesia for procedures on the upper leg (except knee) | Related for anesthetic planning when concurrent upper leg procedures occur with pelvic biopsy. |
01320 | Anesthesia for procedures on the knee and popliteal area | Related for scheduling or when additional procedures on the knee are performed in same session. |
01462 | Anesthesia for procedures on the lower leg (below knee) | Related when additional lower extremity procedures are performed in same operative episode. |
01610 | Anesthesia for procedures on the shoulder and axilla | Included among related anesthesia CPTs for cross-reference; not directly related to iliac crest biopsy but part of anesthesia code set. |
01710 | Anesthesia for procedures on the upper arm and elbow | Included for anesthesia service grouping reference. |
01810 | Anesthesia for procedures on the forearm, wrist, and hand | Included for anesthesia service grouping reference. |
01916 | Anesthesia for radiological procedures | Related when biopsy is performed under image guidance in radiology suite requiring anesthesia support. |
01951 | Anesthesia for burn excisions or debridement procedures | Not specific to biopsy but part of broader anesthesia procedure list for facility coding. |
01958 | Anesthesia for obstetric procedures | Not related to pelvic bone biopsy; included for comprehensive cross-reference. |
01990 | Anesthesia for other procedures | Use when the anesthesia service does not precisely fit a more specific code; may be used in atypical cases or when payer guidance requires. |