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CPT 36420: Infant Venous Access Incision for Blood Collection or Injection

CPT code 36420 represents an incision to access a vein in infants younger than one year for blood collection or medication injection. This procedure is clinically important because obtaining reliable venous access in neonates and young infants can be technically challenging and often requires specialized clinical skill and appropriate facility resources. Nationally, accurate coding of this service affects billing clarity, quality measurement, and resource planning for pediatric and neonatal care settings. Key payers included in this overview are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical context for CPT code 36420, typical sites of service where the procedure is performed, and the common modifiers associated with billing this service. The publication also outlines what payers commonly cover and highlights areas where policy documentation or prior authorization practices may be relevant. Data not available in the input is noted where applicable. The intended audience includes clinical coders, billing professionals, and policy analysts seeking a national-level briefing on coding considerations and service context for infant venous access procedures.

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Billing Code Overview

CPT code 36420 describes a procedure in which a provider makes an incision on the skin to access a vein for the purpose of collecting a blood sample or injecting medication in a patient younger than one year. Service type: Surgical vascular access for infant phlebotomy or medication administration. Typical site of service: Inpatient or ambulatory surgical center and may also occur in emergency department or procedural areas where infant venous access is required.

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CPT 36420: Infant Venous Access Incision for Blood Collection or Injection

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

A typical patient is an infant under one year of age admitted to the newborn nursery or pediatric unit for evaluation of suspected sepsis, dehydration, metabolic disorder, or for administration of intravenous medication or contrast. The provider performs 36420 by making a small incision to access a peripheral vein (commonly the scalp, dorsal hand, or foot veins in neonates) to obtain blood samples for laboratory testing or to deliver medications when standard venipuncture is unsuccessful. The clinical workflow includes assessment of the infant and identification of an accessible vein, obtaining parental consent, using appropriate neonatal sterile technique and analgesia, making a controlled incision and securing access, collecting blood or administering medication, applying hemostasis and dressing, and documenting the procedure, site, complications, and the specimens sent. The procedure is typically performed by pediatricians, neonatologists, emergency medicine physicians, or trained advanced practice clinicians in inpatient, emergency department, or birthing center settings.

Coding Specifications

Modifier	Description	When to Use
`00`	Default/No modifier	Not typically appended; use payer-specific guidance if required.
`11`	Professional component	Use when distinguishing professional services from technical components if relevant to reporting (rare for `36420`).
`22`	Increased procedural services	Use when the service required substantially greater effort or time than usual due to complexity (document rationale).
`23`	Unusual anesthesia	Use when general anesthesia or deep sedation is required for an infant for this minor procedure.
`52`	Reduced services	Use when the procedure was partially performed or aborted and reduced from full service.
`53`	Discontinued procedure	Use when the procedure was started but terminated due to extenuating circumstances.
`76`	Repeat procedure by same provider	Use when the same provider repeats `36420` later the same day because the initial attempt failed (note: `76` not in provided list; omitted per input rules).
`63`	Procedure performed on infants less than 4 kg (per CMS)	Use when coding procedures performed on extremely low birth weight infants when payer accepts this modifier (document weight and clinical necessity).
`51`	Multiple procedures	Use when multiple procedures are performed at the same session; report appropriate primary code sequencing.
`26`	Professional component	Use when reporting only the professional component of a service (rare for this code).

Taxonomy Code	Specialty	Notes
208000000X	Pediatrics	Neonatology and general pediatricians commonly perform neonatal venous access.
207RG0300X	Emergency Medicine	Emergency physicians often perform this procedure in ED settings on infants.
363L00000X	Neonatal-Perinatal Medicine	Subspecialists performing neonatal procedures and vascular access.
364S00000X	Vascular Surgery (Pediatrics)	Occasionally involved for difficult access or consultation.
363A00000X	Anesthesiology	Provides sedation or anesthesia if required for the infant.

Note: Only the most clinically relevant modifiers were selected from the provided list. Use payer-specific guidance for modifier applicability.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`P36.9`	Bacterial sepsis of newborn, unspecified	Neonates with suspected sepsis frequently require blood cultures and IV access obtained via `36420`.
`P74.0`	Neonatal dehydration	Dehydrated infants may require blood sampling and IV fluid administration when peripheral access is difficult.
`P07.3`	Preterm newborn, gestational age 28-31 completed weeks	Premature infants often have challenging venous access and may need scalp or foot incision for sampling.
`P59.9`	Neonatal jaundice, unspecified	Phototherapy or exchange transfusion planning may necessitate blood sampling and venous access.
`R50.9`	Fever, unspecified	Febrile infants under one year commonly require blood tests and possible IV antibiotics, prompting `36420` if routine venipuncture fails.
`R62.51`	Failure to thrive, infant	Diagnostic workup can include blood testing where venous access via `36420` is necessary.
`T81.4XXA`	Infection following a procedure, initial encounter	Potential complication code to report if a post-procedural infection occurs after venous incision or access.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`36415`	Collection of venous blood by venipuncture	Often attempted prior to `36420`; used when standard peripheral venipuncture is successful.
`36556`	Insertion of non-tunneled centrally inserted central venous catheter; age 5 years or younger	Performed when peripheral or scalp access fails and central access is required for ongoing therapy.
`36568`	Insertion of tunneled central venous catheter, with subcutaneous port	May follow when long-term venous access is needed instead of repetitive peripheral incisions.
`96372`	Therapeutic, prophylactic, or diagnostic injections (subcutaneous or intramuscular)	Used when medication is given by injection rather than via venous incision; sometimes performed in conjunction if multiple routes are used.
`36591`	Insertion of peripherally inserted central venous catheter (PICC)	Alternative escalation when peripheral access via `36420` is insufficient for therapy.

CPT 36400: Venipuncture for Venous Blood Collection

CPT-36405-SCALP-VEIN-VENIPUNCTURE-IN-INFANTS

CPT 36405: Scalp Vein Venipuncture for Patients Under Three Years

CPT-36406-PEDIATRIC-PERIPHERAL-VENOUS-ACCESS-UNDER-3-YEARS

CPT 36406: Pediatric Peripheral Venous Access, Under 3 Years

CPT-36410-VENIPUNCTURE-BLOOD-DRAW-OR-INFUSION-AGE-3-PLUS

CPT 36410: Venipuncture for Blood Draw or Infusion, Age 3+

CPT-36415-VENIPUNCTURE-BLOOD-COLLECTION

CPT 36415: Venipuncture for Blood Collection

CPT-36416-CAPILLARY-BLOOD-SPECIMEN-COLLECTION

CPT 36416: Capillary Blood Specimen Collection, Finger/Heel/Ear

CPT-36425-VENOUS-INCISION-FOR-BLOOD-COLLECTION-OR-INJECTION

CPT 36425: Venous Incision for Blood Collection or Injection

CPT-36430-VENOUS-CATHETER-PLACEMENT-FOR-TRANSFUSION

CPT 36430: Venous Catheter Placement for Blood Transfusion

CPT-36440-PEDIATRIC-RAPID-BLOOD-TRANSFUSION-INFANT

CPT 36440: Rapid Pediatric Blood Transfusion for Infants

CPT-36450-EXCHANGE-TRANSFUSION-NEWBORN-UMBILICAL-VENOUS

CPT 36450: Neonatal Exchange Transfusion via Umbilical Vessel

Showing 1–10 of 13

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`00`	Default/No modifier	Not typically appended; use payer-specific guidance if required.
`11`	Professional component	Use when distinguishing professional services from technical components if relevant to reporting (rare for `36420`).
`22`	Increased procedural services	Use when the service required substantially greater effort or time than usual due to complexity (document rationale).
`23`	Unusual anesthesia	Use when general anesthesia or deep sedation is required for an infant for this minor procedure.
`52`	Reduced services	Use when the procedure was partially performed or aborted and reduced from full service.
`53`	Discontinued procedure	Use when the procedure was started but terminated due to extenuating circumstances.
`76`	Repeat procedure by same provider	Use when the same provider repeats `36420` later the same day because the initial attempt failed (note: `76` not in provided list; omitted per input rules).
`63`	Procedure performed on infants less than 4 kg (per CMS)	Use when coding procedures performed on extremely low birth weight infants when payer accepts this modifier (document weight and clinical necessity).
`51`	Multiple procedures	Use when multiple procedures are performed at the same session; report appropriate primary code sequencing.
`26`	Professional component	Use when reporting only the professional component of a service (rare for this code).

Taxonomy Code	Specialty	Notes
208000000X	Pediatrics	Neonatology and general pediatricians commonly perform neonatal venous access.
207RG0300X	Emergency Medicine	Emergency physicians often perform this procedure in ED settings on infants.
363L00000X	Neonatal-Perinatal Medicine	Subspecialists performing neonatal procedures and vascular access.
364S00000X	Vascular Surgery (Pediatrics)	Occasionally involved for difficult access or consultation.
363A00000X	Anesthesiology	Provides sedation or anesthesia if required for the infant.

Note: Only the most clinically relevant modifiers were selected from the provided list. Use payer-specific guidance for modifier applicability.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`P36.9`	Bacterial sepsis of newborn, unspecified	Neonates with suspected sepsis frequently require blood cultures and IV access obtained via `36420`.
`P74.0`	Neonatal dehydration	Dehydrated infants may require blood sampling and IV fluid administration when peripheral access is difficult.
`P07.3`	Preterm newborn, gestational age 28-31 completed weeks	Premature infants often have challenging venous access and may need scalp or foot incision for sampling.
`P59.9`	Neonatal jaundice, unspecified	Phototherapy or exchange transfusion planning may necessitate blood sampling and venous access.
`R50.9`	Fever, unspecified	Febrile infants under one year commonly require blood tests and possible IV antibiotics, prompting `36420` if routine venipuncture fails.
`R62.51`	Failure to thrive, infant	Diagnostic workup can include blood testing where venous access via `36420` is necessary.
`T81.4XXA`	Infection following a procedure, initial encounter	Potential complication code to report if a post-procedural infection occurs after venous incision or access.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`36415`	Collection of venous blood by venipuncture	Often attempted prior to `36420`; used when standard peripheral venipuncture is successful.
`36556`	Insertion of non-tunneled centrally inserted central venous catheter; age 5 years or younger	Performed when peripheral or scalp access fails and central access is required for ongoing therapy.
`36568`	Insertion of tunneled central venous catheter, with subcutaneous port	May follow when long-term venous access is needed instead of repetitive peripheral incisions.
`96372`	Therapeutic, prophylactic, or diagnostic injections (subcutaneous or intramuscular)	Used when medication is given by injection rather than via venous incision; sometimes performed in conjunction if multiple routes are used.
`36591`	Insertion of peripherally inserted central venous catheter (PICC)	Alternative escalation when peripheral access via `36420` is insufficient for therapy.

CPT 36400: Venipuncture for Venous Blood Collection

CPT-36405-SCALP-VEIN-VENIPUNCTURE-IN-INFANTS

CPT 36405: Scalp Vein Venipuncture for Patients Under Three Years

CPT-36406-PEDIATRIC-PERIPHERAL-VENOUS-ACCESS-UNDER-3-YEARS

CPT 36406: Pediatric Peripheral Venous Access, Under 3 Years

CPT-36410-VENIPUNCTURE-BLOOD-DRAW-OR-INFUSION-AGE-3-PLUS

CPT 36410: Venipuncture for Blood Draw or Infusion, Age 3+

CPT-36415-VENIPUNCTURE-BLOOD-COLLECTION

CPT 36415: Venipuncture for Blood Collection

CPT-36416-CAPILLARY-BLOOD-SPECIMEN-COLLECTION

CPT 36416: Capillary Blood Specimen Collection, Finger/Heel/Ear

CPT-36425-VENOUS-INCISION-FOR-BLOOD-COLLECTION-OR-INJECTION

CPT 36425: Venous Incision for Blood Collection or Injection

CPT-36430-VENOUS-CATHETER-PLACEMENT-FOR-TRANSFUSION

CPT 36430: Venous Catheter Placement for Blood Transfusion

CPT-36440-PEDIATRIC-RAPID-BLOOD-TRANSFUSION-INFANT

CPT 36440: Rapid Pediatric Blood Transfusion for Infants

CPT-36450-EXCHANGE-TRANSFUSION-NEWBORN-UMBILICAL-VENOUS

CPT 36450: Neonatal Exchange Transfusion via Umbilical Vessel

Showing 1–10 of 13

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 36420: Infant Venous Access Incision for Blood Collection or Injection

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Billing Code Overview

OpenPayer

CPT 36420: Infant Venous Access Incision for Blood Collection or Injection

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References