CPT Code 00140: Anesthesia for Procedures on the Eye — Complete Billing & Coding Guide
What Does CPT Code 00140 Mean?
CPT code 00140 describes anesthesia services provided for general procedures on the eye and ocular adnexa. This code is part of the anesthesia section for head procedures (00100-00222) and applies to ophthalmic surgeries such as cataract extraction, glaucoma surgery, corneal transplantation, vitrectomy, retinal detachment repair, strabismus correction, and enucleation. It is the primary anesthesia code for most eye surgeries and represents a significant portion of anesthesia billing in ambulatory surgery centers.
Key Code Attributes:
- Billable Status: Fully billable as a standalone anesthesia service
- Base Units (CMS 2026): 4
- Primary Setting: Ambulatory surgery center, hospital outpatient department, or eye surgery center
- Provider Type: Anesthesiologist (MD/DO), CRNA with physician supervision, or anesthesia assistant under physician direction
- Service Category: Monitored anesthesia care (MAC) or general anesthesia (GA)
- Effective Status: Active CPT code with no planned retirement (verified through 2026)
- Common Surgical Partners: Ophthalmology, oculoplastic surgery, vitreoretinal surgery, pediatric ophthalmology
What Services and Procedures Does CPT Code 00140 Cover?
CPT 00140 covers anesthesia for a broad range of ophthalmic procedures involving the globe (eyeball), orbit, and ocular adnexa. The code encompasses both anterior segment (cornea, iris, lens) and posterior segment (vitreous, retina) surgeries.
Covered Procedures and Surgical Indications:
- Cataract extraction with intraocular lens implantation (phacoemulsification)
- Glaucoma surgery (trabeculectomy, tube shunt, laser cyclophotocoagulation)
- Corneal transplantation (penetrating keratoplasty, DSEK, DMEK)
- Vitrectomy (pars plana vitrectomy for floaters, hemorrhage, or membrane peel)
- Retinal detachment repair (scleral buckle, vitrectomy with gas or oil)
- Strabismus correction (pediatric and adult)
- Enucleation or evisceration of the eye
- Orbital decompression for thyroid eye disease
- Orbital tumor excision
- Dacryocystorhinostomy (DCR) — external or endoscopic
- Ptosis repair and blepharoplasty (when functional)
- Pterygium excision with conjunctival graft
- Iridectomy or iridotomy
- Corneal laceration repair
- Removal of intraocular foreign body
- Secondary intraocular lens implantation
- Repair of ruptured globe
What Does CPT 00140 Specifically Exclude?
| Excluded Procedure | Correct Code | Rationale |
|---|---|---|
| Lens surgery (cataract) alone | CPT 00142 | More specific for lens procedures |
| Corneal transplant alone | CPT 00144 | More specific for corneal procedures |
| Vitreoretinal surgery alone | CPT 00145 | More specific for posterior segment |
| Iridectomy alone | CPT 00147 | More specific for iris procedures |
| Eye procedures in patients under 1 year | CPT 00148 | Age-specific code with higher base units |
| Procedures on the external ear | CPT 00120 | Different anatomic region |
| Procedures on the integumentary system | CPT 00100 | Skin and subcutaneous tissue only |
When Is CPT Code 00140 the Right Code to Use?
Step-by-Step Code Selection Criteria
- Identify the primary surgical site — confirm the procedure involves the eye or ocular adnexa
- Determine if a more specific eye code applies — 00142 (lens), 00144 (cornea), 00145 (vitreoretinal), 00147 (iris)
- Check patient age — for patients under 1 year, use CPT 00148
- Verify the approach — endoscopic DCR through the nose may alternatively be coded based on approach
- Document anesthesia type — MAC is common for cataract surgery; GA for posterior segment, pediatric, or complex cases
How Does CPT 00140 Differ From Related Eye Anesthesia Codes?
| Code | Anatomic Area | Base Units (2026) | Typical Surgical Examples |
|---|---|---|---|
| 00140 | Eye (general) | 4 | Cataract, glaucoma, strabismus, enucleation, vitrectomy |
| 00142 | Lens | 4 | Cataract extraction, lens implantation |
| 00144 | Cornea | 4 | Penetrating keratoplasty, DSEK, DMEK |
| 00145 | Vitreoretinal | 5 | Vitrectomy, retinal detachment repair |
| 00147 | Iris | 4 | Iridectomy |
| 00148 | Eye — patient under 1 year | 5 | Congenital cataract, glaucoma surgery in infants |
What Documentation Is Required to Support CPT 00140?
What Must the Provider Document?
Preoperative Documentation:
- Patient history and physical with emphasis on cardiopulmonary status
- ASA Physical Status Classification
- Anesthesia plan — MAC vs. general anesthesia
- Assessment of oculocardiac reflex risk — especially for strabismus surgery
- NPO status verification
- Medication reconciliation — anticoagulants, antiplatelet agents
Intraoperative Documentation:
- Anesthesia start and stop times (continuous face-to-face care)
- Vital signs at minimum 5-minute intervals
- Type, dose, route, and time of all anesthetic agents
- Level of sedation (for MAC cases — Ramsay or MOAA/S scale)
- Oxygen administration and airway management
- Management of oculocardiac reflex if triggered
- Fluid management
- Peribulbar or retrobulbar block documentation (if performed by anesthesia provider)
Postoperative Documentation:
- PACU admission and discharge times
- Pain scores and analgesic administration
- Nausea/vomiting assessment — higher risk in ophthalmic surgery
- Visual acuity assessment if applicable
- Aldrete score or equivalent
Base Unit Assignment and Time Calculation
| Component | Value |
|---|---|
| Base Units (CMS 2026) | 4 |
| Time Unit Increment | 15 minutes |
| Physical Status P3 | +1 unit |
| Physical Status P4 | +2 units |
| Physical Status P5 | +3 units |
| Qualifying Circumstances | +1 unit per applicable code |
How Does CPT 00140 Affect Medical Billing and Reimbursement?
2026 RVU Breakdown for CPT 00140
| Component | Facility Value |
|---|---|
| Work RVU | 1.20 |
| Practice Expense RVU | 0.06 |
| Malpractice RVU | 0.07 |
| Total RVU | 1.33 |
| Estimated Medicare Payment | ~$44-48 |
Payer Considerations
- Medicare: Covers anesthesia for medically necessary ophthalmic procedures. Cataract surgery anesthesia is covered when the patient requires anesthesia provider involvement
- Commercial Payers: Standard coverage for ophthalmic anesthesia. Some require prior authorization for certain procedures
- Medicare ASC: Cataract surgery in ASCs is common — anesthesia is separately billable
- Modifier Usage: MAC (modifier QS) is very common for cataract surgery
- Regional Blocks: Peribulbar or retrobulbar blocks performed by the anesthesia provider are included in the anesthesia service
Common Modifiers Used With CPT 00140
| Modifier | Description | Use Case |
|---|---|---|
| AA | Anesthesia personally performed | Anesthesiologist performs entire service |
| QK | Medical direction of 2-4 concurrent cases | Supervising CRNA |
| QX | CRNA with medical direction | Directed CRNA service |
| QZ | CRNA without medical direction | Independent CRNA practice |
| P1-P6 | Physical status | ASA classification |
| QS | Monitored anesthesia care | MAC for cataract surgery |
| 23 | Unusual anesthesia | Unusual circumstances |
What CPT or HCPCS Codes Are Commonly Billed Alongside CPT 00140?
| Associated Code/Service | Description | Billing Guidance |
|---|---|---|
| Surgical codes | 66984 (cataract), 65820 (trabeculectomy), 67113 (vitrectomy) | Surgical codes billed by surgeon |
| Qualifying circumstances | 99100-99140 | Extreme age, emergency |
| Regional block (retrobulbar/peribulbar) | Not separately billable | Included in anesthesia service |
| Monitored anesthesia care | Modifier QS | Append to indicate MAC |
| Pre-operative evaluation | Not separately billable | Included in anesthesia service |
NCCI Edits: CPT 00140 does not bundle with surgical codes for ophthalmic procedures. The anesthesia code is always separately reportable. Regional blocks performed by the anesthesia provider are bundled.
What Coding Errors Should You Avoid With CPT 00140?
Top 5 Coding Errors Ranked by Audit Frequency:
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Using CPT 00140 When a More Specific Eye Code Applies If the procedure is cataract surgery alone, CPT 00142 is more specific. For corneal transplant, use 00144. For vitreoretinal surgery, use 00145. While 00140 covers all eye procedures, using a more specific code when available is preferred.
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Billing for Cataract Anesthesia When the Surgeon Uses Topical Anesthesia Alone Many cataract surgeries are performed under topical anesthesia (drops or gel) administered by the surgeon without an anesthesia provider. In these cases, no anesthesia code is reported. CPT 00140 requires anesthesia provider involvement.
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Incorrect Coding of Oculocardiac Reflex Management The oculocardiac reflex (OCR) is common during strabismus surgery and retinal detachment repair. If medical intervention is required (glycopyrrolate, atropine, surgical pause), document the event and treatment.
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Failure to Document MAC vs. General Anesthesia MAC (modifier QS) is common for cataract surgery. General anesthesia is used for complex cases. Documentation must clearly reflect the level of anesthesia service provided.
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Reporting CPT 00140 for Bilateral Procedures Incorrectly Bilateral eye surgery during a single anesthetic session is reported with one CPT 00140. Do not report the code twice or append modifier 50.
How Does CPT 00140 Relate to Other CPT Codes?
| CPT Code | Anatomic Area | Base Units (2026) | Relationship |
|---|---|---|---|
| 00140 | Eye (general) | 4 | Broadest eye anesthesia code |
| 00142 | Lens | 4 | Cataract surgery specifically |
| 00144 | Cornea | 4 | Corneal transplant procedures |
| 00145 | Vitreoretinal | 5 | Posterior segment surgery with higher complexity |
| 00147 | Iris | 4 | Iridectomy and related procedures |
| 00148 | Eye — under 1 year | 5 | Pediatric eye surgery in infants |
| 00100 | Integumentary — head and neck | 3 | Eyelid skin procedures not involving globe |
Real-World Coding Scenario — How CPT 00140 Is Applied in Practice
Patient Scenario: A 72-year-old female with a visually significant cataract (left eye) undergoes phacoemulsification with intraocular lens implantation under monitored anesthesia care. The anesthesia provider administers propofol sedation, performs a peribulbar block for akinesia and analgesia, and monitors the patient throughout the procedure. Total anesthesia time is 35 minutes. The patient is ASA II with well-controlled hypertension.
Correct Coding:
- CPT 00140 — Anesthesia for procedures on the eye
- Modifiers: AA (personally performed) + P2 + QS (MAC)
- Base Units: 4
- Time Units: 35 min / 15 = 2.33, rounded to 2 time units
- Physical Status Units: 0 (P2)
- Total Units: 4 + 2 + 0 = 6
- Estimated Payment: 6 units x $35 (CF) = ~$210
Common Mistake: Billing a separate code for the peribulbar block (e.g., 64415, 64420). Regional blocks performed by the anesthesia provider for postoperative pain management are included in the anesthesia service and are not separately billable.
Alternative Scenario — Strabismus Surgery: A 6-year-old male undergoes bilateral strabismus correction under general anesthesia. Total anesthesia time is 60 minutes. ASA I. Code: CPT 00140 with AA + P1. Base units 4, time units 4, total 8 units. The oculocardiac reflex is monitored throughout.
Frequently Asked Questions About CPT Code 00140
Is CPT 00140 the Correct Code for Cataract Surgery?
Yes, CPT 00140 is correct for cataract surgery when anesthesia provider involvement is required. However, CPT 00142 (lens surgery) is more specific. Both codes have the same base units (4), so reimbursement is identical. Some coders prefer 00140 for its broader scope; others use 00142 for specificity.
Can CPT 00140 Be Billed for MAC for Cataract Surgery?
Yes. Monitored anesthesia care (MAC) is the most common anesthesia approach for cataract surgery. Append modifier QS to indicate MAC. Documentation must confirm the anesthesia provider was present and managing sedation, monitoring, and airway throughout the procedure.
What Is the Oculocardiac Reflex and Why Does It Matter?
The oculocardiac reflex (OCR) is a trigeminovagal reflex triggered by traction on the extraocular muscles or pressure on the globe. It causes bradycardia, nausea, and potentially asystole. It is most common during strabismus surgery and retinal detachment repair. Anesthesia providers must monitor for OCR and be prepared to intervene with anticholinergic medications or request surgical pause.
Is a Peribulbar or Retrobulbar Block Included in CPT 00140?
Yes. When the anesthesia provider performs a peribulbar or retrobulbar block for ophthalmic surgery, it is included in the anesthesia service and is not separately billable. If the surgeon performs the block, it is included in the surgical global package.
Does CPT 00140 Cover Eyelid Surgery?
It depends. Eyelid surgery that involves the globe or requires intraocular manipulation is coded with CPT 00140. Blepharoplasty limited to the skin and subcutaneous tissue of the eyelid without globe involvement may be coded with CPT 00100 (integumentary system).
Key Takeaways for Billing and Coding CPT 00140
- Code Scope: Anesthesia for general eye and ocular adnexa procedures
- Base Units: 4 (CMS 2026)
- Common Use: Cataract surgery (MAC), glaucoma surgery, strabismus correction, retinal surgery
- Block Included: Peribulbar/retrobulbar block by anesthesia provider is bundled
- MAC Common: QS modifier for MAC is standard for cataract cases
- OCR Risk: Document oculocardiac reflex monitoring and any interventions
- More Specific Codes: Consider 00142 (lens), 00144 (cornea), 00145 (vitreoretinal), 00147 (iris) when applicable
- Payment Range: ~$44-48 Medicare base (adds time units)
Additional Resources & References
- CMS Physician Fee Schedule (PFS): CMS MPFS lookup tool — Official base units and payment rates
- ASA Relative Value Guide: Annual anesthesia base unit reference for commercial payers
- CMS Medicare Claims Processing Manual, Chapter 12: Pub. 100-04 — Anesthesia billing requirements
- American Academy of Ophthalmology: Clinical practice guidelines for ophthalmic surgery
- American Society of Cataract and Refractive Surgery (ASCRS): Anesthesia guidelines for cataract surgery
