CPT 01992: Anesthesia for Nerve Block or Injection, Prone/Supine
CPT code 01992 identifies anesthesia services rendered when an anesthesiology provider manages anesthesia for a patient undergoing a diagnostic or therapeutic nerve block or injection performed by another clinician, with the patient in a prone or lying-flat position. This code matters nationally because it documents a distinct anesthesia service tied to procedural positioning and a separate performing clinician, affecting billing workflows, procedural documentation, and payer adjudication across care settings. Key payers in typical analyses include Aetna, Blue Cross Blue Shield, Cigna Health, United Healthcare, and Medicare. Readers will find a concise overview of the code’s clinical scope and service context, comparisons to closely related anesthesia and injection codes, common associated diagnoses, and the set of modifiers and payer considerations commonly reported with this service. The publication also outlines typical sites of service and related procedure codes that clinicians and billers commonly reference when reporting anesthesia for nerve blocks and injections performed by another provider. Data not available in the input for specific national reimbursement rates and utilization benchmarks.
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Billing Code Overview
CPT code 01992 describes anesthesia services provided when a different clinician performs a diagnostic or therapeutic nerve block or injection and the patient is positioned prone or lying flat. This service involves administration and management of anesthesia care specifically associated with nerve block or injection procedures performed by another provider.
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Service type: Anesthesia for diagnostic or therapeutic nerve block/injection performed by another provider
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Typical site of service: Ambulatory surgical centers or hospital procedural areas where nerve block or injection procedures are performed with the patient prone or supine
Clinical & Coding Specifications
Clinical Context
A 54-year-old patient with chronic low back pain (M54.5) and radicular symptoms presents to an interventional pain clinic for a fluoroscopy-guided lumbar transforaminal epidural steroid injection performed by an interventional pain physician. An anesthesiologist or anesthesiologist assistant provides monitored anesthesia care (MAC) for the injection while the patient is positioned prone (lying flat) on the procedure table. The anesthetic team performs airway monitoring, intravenous sedation/analgesia titration, hemodynamic monitoring, and management of sedation-related events; the diagnostic or therapeutic nerve block/injection itself is performed by the interventionalist. Documentation includes pre-procedure evaluation (ASA status), intra-procedure sedation records (drugs, doses, vitals), and post-anesthesia recovery notes. Typical workflow: pre-op assessment by anesthesia, consenting for sedation (separate from procedural consent), initiation of IV access and sedation in the procedure room, continuous monitoring during prone injection, handoff to recovery staff after emergence, and anesthesia billing for the anesthesia services associated with the injection using 01992 when the patient is prone.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
AA | Anesthesia service performed personally by anesthesiologist | Use when the physician anesthesiologist personally administers and manages MAC for the injection. |
AD | Medical supervision by a physician; more than four concurrent anesthesia procedures | Use when the anesthesiologist supervises an anesthesiology care team during multiple concurrent procedures.
AS | Physician assistant, nurse practitioner, or clinical nurse specialist services for anesthesia | Use when an eligible non-physician anesthesia practitioner provides services under appropriate state law and payer rules.
QK | Medical direction of two, three, or four concurrent anesthesia procedures involving qualified individuals | Use when the anesthesiologist medically directs a team of CRNAs for multiple concurrent MAC cases.
QX | CRNA service with medical direction by a physician | Use when a CRNA furnishes MAC and the anesthesiologist medically directs the case.
QS | Monitored anesthesia care (MAC) service | Use when MAC is provided and reporting requirements call for this modifier per payer guidance.
23 | Unusual anesthesia — service rendered under unusual circumstances | Use when the MAC requires substantially greater than normal anesthesia due to patient condition or technical difficulty.
62 | Two surgeons or co-surgeons | Rare for this code; use if two anesthesia providers are required to simultaneously manage the patient (apply per payer rules).
78 | Unplanned return to OR/procedure by same physician following initial procedure for a related procedure during the global period | Use if the patient requires an unplanned repeat injection/anesthesia related to complications within the global period.
59 | Distinct procedural service | Use when differentiating the anesthesia service from other billable services on the same day per documentation showing distinct service elements.
52 | Reduced services | Use when MAC is provided but services are reduced or partially performed compared with full planned service.
53 | Discontinued procedure | Use when anesthesia began but the injection was discontinued prior to completion for documented clinical reasons.
55 | Postoperative management only | Use when anesthesia involvement is limited to postoperative management rather than intraoperative sedation for the injection.
XP | Service performed in part by an individual practitioner | Use when part of the anesthesia service was performed by a specific practitioner distinct from the billing clinician (apply per payer guidance).
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207L00000X | Anesthesiology | Physician anesthesiologists who provide MAC for diagnostic or therapeutic nerve blocks in the prone position. |
367500000X | Anesthesiologist Assistant | Anesthesiologist assistants providing sedation under physician supervision where permitted.
367H00000X | Anesthesiology Assistant | Other credentialed anesthesia support practitioners providing MAC under supervising anesthesiologist per state and payer rules.
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
M54.5 | Low back pain | Common indication for lumbar epidural, transforaminal, or peripheral nerve injections where anesthesia/MAC may be provided during prone procedures. |
G89.29 | Other chronic pain | Reflects chronic pain syndromes prompting diagnostic or therapeutic nerve blocks; anesthesia services facilitate patient comfort and immobility during the procedure.
M54.2 | Cervicalgia | Neck pain that may prompt cervical interlaminar or transforaminal injections performed by the proceduralist with anesthesia support when prone positioning is used.
M79.7 | Fibromyalgia | Widespread musculoskeletal pain where diagnostic injections or trigger point procedures may be performed with sedation or MAC for patient comfort.
G89.18 | Other acute postprocedural pain | Represents acute pain after prior procedures that may trigger repeat diagnostic or therapeutic injections with anesthesia services billed under 01992.
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
64450 | Injection, anesthetic agent; other peripheral nerve or branch | Represents the nerve block/injection procedure often performed by an interventionalist while anesthesia services are reported separately with 01992 when anesthesia is provided by a different provider. |
64483 | Injection(s), anesthetic agent and/or steroid, transforaminal epidural; lumbar or sacral, single level | Common therapeutic injection that the proceduralist performs while MAC is provided by anesthesia and billed under 01992 for prone positioning.
62322 | Injection(s) of diagnostic or therapeutic substance(s), interlaminar epidural; cervical or thoracic | Alternative interlaminar epidural injection procedure performed by the proceduralist with separate anesthesia services reported under 01992 when anesthesia management is provided by another clinician.
01991 | Anesthesia for diagnostic or therapeutic nerve blocks and injections; supine position | Companion anesthesia code used when the patient is supine; 01992 is used specifically when the patient is prone (lying flat) and the block is performed by another provider.