Clinical Context
A 34-year-old pregnant woman at 16 weeks’ gestation presents to maternal-fetal medicine for evaluation after abnormal first-trimester screening indicating increased risk for trisomy 21. The patient has received counseling regarding diagnostic testing options. After informed consent, the maternal-fetal medicine specialist performs an amniocentesis to obtain amniotic fluid for genetic analysis. The procedure is performed in an outpatient ambulatory surgery center or hospital labor and delivery unit with continuous fetal monitoring, ultrasound guidance, and sterile technique. Pre-procedure workflow includes verification of gestational age, review of prior ultrasound for placental location and fetal number, obtaining baseline maternal vital signs and fetal heart rate, anticoagulation and infection history screening, informed consent, and availability of emergency equipment. Post-procedure workflow includes brief observation with fetal monitoring, wound care instructions, laboratory handling of amniotic fluid specimens, documentation of indication, technique, ultrasound guidance, fetal heart tones before and after, and any immediate complications such as leakage of fluid, bleeding, or uterine cramping.
Coding Specifications
| Modifier | Description | When to Use |
|---|
25 | Significant, separately identifiable evaluation and management (E/M) service by the same physician on the day of a procedure | Use when a distinct E/M visit (e.g., informed consent, pre-procedure assessment) is performed the same day as the amniocentesis. |
| 59 | Distinct procedural service | Use when amniocentesis is reported with another procedure on the same day and the services are separate and independent.
| 76 | Repeat procedure by same physician | Use if a repeat amniocentesis is required on the same day by the same provider.
| 78 | Unplanned return to the operating/procedure room by the same physician following initial procedure for a related procedure during the postoperative period | Use for immediate re-entry for a complication related to the amniocentesis.
| 52 | Reduced services | Use when the amniocentesis is partially reduced or not fully performed (e.g., inability to obtain adequate fluid).
| 53 | Discontinued procedure | Use when the amniocentesis is started but discontinued due to patient instability or technical inability.
| 22 | Increased procedural services | Use when the procedure requires significantly greater than usual physician work (e.g., difficult anatomy, multiple attempts).
| 76 | Repeat procedure by same physician | Use when a repeat amniocentesis is required on the same day by the same provider. |
| 73 | Discontinued outpatient hospital/ambulatory surgery center (ASC) procedure prior to anesthesia being administered | Use if an outpatient amniocentesis is canceled before local anesthesia or procedure start.
| AS | Ambulatory surgery center facility service | Use to indicate the facility component when performed in an ASC.
| TC | Technical component | Use to report the technical component when the facility bills separately for equipment, ultrasound or supplies.
| 26 | Professional component | Use when reporting only the physician’s professional component if the facility bills the technical component separately.
| 50 | Bilateral procedure | Rarely applicable; use if procedure was performed on multiple gestations requiring sampling of separate sacs and payer requires bilateral indicator.
| 59 | Distinct procedural service | Use to indicate a distinct service when other procedures are reported on the same day.
| Taxonomy Code | Specialty | Notes |
|---|
| 2080S0004X | Maternal and Fetal Medicine | Specialists who commonly perform diagnostic amniocentesis and manage high-risk pregnancy. |
| 207Q00000X | Obstetrics & Gynecology | General obstetricians who perform amniocentesis in appropriate settings.
| 208U00000X | Diagnostic Radiology | Radiologists may perform ultrasound guidance or image-guided procedures in some settings.
| 2085R0201X | Diagnostic Medical Sonography (Ultrasound) | Sonographers perform real-time ultrasound imaging assisting the procedure.
| 363A00000X | Clinical Laboratory Director | Laboratory leadership involved in handling and testing amniotic fluid specimens.
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|
O30.013 | Twin pregnancy with intrauterine growth restriction, first twin | Multiple gestation evaluation may require amniocentesis for genetic or assessment indications. |
| O35.0XX0 | Maternal care for (suspected) chromosomal abnormalities in fetus, unspecified trimester, fetus 1 | Common indication for diagnostic genetic testing via amniocentesis.
| O09.021 | Supervision of pregnancy with history of adverse reproductive or obstetric outcome, second trimester | High-risk surveillance where diagnostic testing may be indicated.
| Z34.90 | Encounter for supervision of normal pregnancy, unspecified, unspecified trimester | Routine pregnancies with abnormal screening results may proceed to amniocentesis for diagnostic confirmation.
| Z31.83 | Encounter for genetic counseling | Genetic counseling usually precedes amniocentesis and documents the indication and consent.
| O28.89 | Other specified abnormalities of amniotic fluid | Abnormal amniotic fluid findings on ultrasound may prompt amniocentesis for further evaluation.
| R94.5 | Abnormal results of diagnostic imaging of other body structures | Abnormal ultrasound findings prompting diagnostic amniocentesis.
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|
76942 | Ultrasound guidance for needle placement (eg, biopsy, aspiration, injection, catheterization); real-time with permanent recording and reporting | Often used contemporaneously to guide needle placement for amniocentesis and may be billed if criteria met. |
| 59001 | Sampling of amniotic fluid for motion picture or video, additional procedures, or separate services related to amniocentesis (Note: use only if applicable per payer guidelines) | Related in some payer policies for additional distinct sampling or documented separate service.
| 96372 | Therapeutic, prophylactic, or diagnostic injection (specify drug); subcutaneous or intramuscular | Occasionally used if concurrent medication (e.g., Rho(D) immune globulin) is administered at the time of the procedure.
| 99203 | Office or other outpatient visit for the evaluation and management of a new patient, typically 30 minutes | Represents a pre-procedure E/M when significant decision-making and counseling occur on the same day as the amniocentesis; append 25 if reported with 59000.
| 59426 | Unlisted obstetrical procedure, during pregnancy, labor and/or delivery | May be referenced for uncommon obstetrical procedures related to maternal-fetal interventions (use per payer guidance).