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HCPCS H1004: Prenatal At-Risk Enhanced Service, Follow-Up Home Visit

HCPCS Level II code H1004 denotes a follow-up home visit as part of enhanced prenatal care for at-risk pregnancies. This code captures services delivered in the patient's home that focus on additional monitoring, education, and care coordination for pregnant individuals with identified risk factors. Nationally, home-based prenatal interventions are an important component of maternal and infant health strategies because they can improve access, support continuity of care, and address social determinants that contribute to adverse outcomes.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what H1004 represents, how it is used in clinical and billing workflows, and the types of service settings associated with the code. The publication provides benchmarks where available, summarizes relevant policy and coverage considerations that affect billing and utilization, and places the code in clinical context for care teams and billing professionals.

The material is organized to highlight practical billing characterization, expected sites of service, and payer coverage patterns. Data not available in the input is noted where applicable.

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Billing Code Overview

HCPCS Level II code H1004 represents prenatal care, at-risk enhanced service; follow-up home visit. The service type is enhanced prenatal care for at-risk pregnancies, focused on follow-up care delivered in the patient's residence. The typical site of service is the patient's home, where clinicians provide targeted prenatal monitoring, education, and care coordination for pregnant individuals identified as at-risk.

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HCPCS H1004: Prenatal At-Risk Enhanced Service, Follow-Up Home Visit

The material is organized to highlight practical billing characterization, expected sites of service, and payer coverage patterns. Data not available in the input is noted where applicable.

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Billing Code Overview

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Clinical & Coding Specifications

Clinical Context

A 24-year-old pregnant patient at 28 weeks' gestation who is identified as high-risk for pregnancy complications (history of preterm birth and limited prenatal access) receives a follow-up home visit under the prenatal at-risk enhanced service H1004. A prenatal care nurse or public health midwife performs the visit in the patient’s home to assess maternal and fetal well-being, review prenatal education, confirm adherence to medications or supplements, evaluate social determinants (housing, food security, transportation), and coordinate referrals to obstetrics, behavioral health, or social services. The clinician documents vital signs, fundal height, fetal heart tones, and any concerning symptoms (vaginal bleeding, severe headache, decreased fetal movement). If immediate clinical issues are identified, the clinician facilitates expedited outpatient obstetric evaluation or emergency transfer. The workflow includes scheduling the visit, obtaining informed consent for home assessment, conducting standardized assessment and education, documenting findings in the medical record, and communicating follow-up plans to the patient’s obstetric provider and care management team.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the home visit requires substantially greater resources or complexity than typical (extensive counseling, multi-disciplinary coordination).
`23`	Unusual anesthesia	Not commonly used for home visits; not typical for `H1004` but included when unusual anesthesia circumstances occur during a related procedure.
`52`	Reduced services	Use if the encounter was partially performed or truncated and not delivered in full.
`53`	Discontinued procedure	Use when the home visit was started but discontinued due to patient condition or safety concerns.
`54`	Surgical care only	Not generally applicable; reserved for surgical-related billing components.
`55`	Postoperative management only	Not applicable to `H1004` except when billing separate postoperative care services.
`56`	Preoperative management only	Rarely applicable; include only if the visit was strictly preoperative evaluation tied to obstetric surgery.
`62`	Two surgeons	Not applicable to routine home visits; include if two clinicians with separate surgical roles are involved in related services.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist in assistant-at-surgery role	Use when an advanced practice clinician provided service in an assistant capacity for a procedure associated with the visit.
`CO`	Distinct procedural service — outpatient Hospital Cost outlier	Use per payer rules when the service qualifies for outpatient cost considerations as distinct from inpatient billing.
`CQ`	Service furnished under contract to the Indian Health Service (IHS) or tribal organization by a physician or other practitioner	Use when the home visit is furnished under such a contract.
`QK`	Medical direction of two, three, or four concurrent anesthesia procedures involving qualified individuals	Not typically used for `H1004`; listed only when anesthesia direction is part of associated services.
`QX`	CRNA service with medical direction by a physician	Not typical for prenatal home visit; include only when anesthesia resources are billed in conjunction with the encounter.
`QY`	Medical direction of one CRNA by an anesthesiologist	Not typical; include only when directly relevant to associated procedures.

Taxonomy Code	Specialty	Notes
`251B00000X`	Obstetrics & Gynecology	Physicians who oversee prenatal care and coordinate high-risk prenatal services.
`363L00000X`	Nurse Midwife	Midwives who commonly perform home prenatal visits and enhanced prenatal services.
`367A00000X`	Nurse Practitioner	Family or women’s health NPs who provide home-based prenatal follow-up and care coordination.
`367500000X`	Public Health Nurse	Nurses focused on community-based prenatal care, social needs assessment, and home visiting.
`206E00000X`	Case Manager	Clinical case managers who coordinate referrals and manage care plans for high-risk pregnant patients.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`O09.212`	Supervision of pregnancy with history of preterm labor, second trimester	High-risk surveillance reason prompting enhanced prenatal home follow-up.
`O10.013`	Pre-existing hypertension complicating pregnancy, second trimester	Chronic maternal conditions requiring home monitoring and coordination.
`O24.410`	Gestational diabetes mellitus in pregnancy, diet controlled	Metabolic conditions managed with education and home follow-up.
`Z59.0`	Homelessness	Social determinant that justifies home visits and care coordination.
`Z63.5`	Disruption of family by separation and divorce	Psychosocial stressor relevant to enhanced prenatal services.
`O36.592`	Maternal care for other suspected fetal abnormality, third trimester	Indication for intensified surveillance and follow-up.
`Z55.9`	Problem related to education and literacy, unspecified	May affect comprehension of prenatal instructions and necessitate home education.
`Z71.3`	Dietary counseling and surveillance	Common service component during enhanced prenatal home visits.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`59425`	Antepartum care only; 4-6 visits, vaginal delivery not included	May represent concurrent or alternative billed antepartum visit bundles when services occur in clinic instead of home.
`59426`	Delivery and postpartum care, vaginal delivery	Related when the prenatal home visit leads to delivery planning and eventual delivery services.
`59430`	Postpartum care only	Follow-up home visit may transition to postpartum home care services billed separately.
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Comparable level E/M code when a brief problem-focused prenatal assessment occurs in an outpatient setting rather than a home visit.
`99401`	Prevention counseling; individual, approximately 15 minutes	Counseling or education components delivered during the home visit may align with preventive counseling CPTs when billed separately.

HCPCS H0001: Alcohol and/or Drug Assessment

HCPCS-H0002-BEHAVIORAL-HEALTH-SCREENING-ADMISSION-ELIGIBILITY

HCPCS H0002: Behavioral Health Screening for Admission to Treatment Program

HCPCS-H0003-ALCOHOL-DRUG-SCREENING-LAB-ANALYSIS

HCPCS H0003: Alcohol and/or Drug Screening, Laboratory Analysis

HCPCS-H0004-BEHAVIORAL-HEALTH-COUNSELING-15-MINUTE

HCPCS H0004: Behavioral Health Counseling and Therapy, 15 Minutes

HCPCS-H0005-GROUP-COUNSELING-SUBSTANCE-USE-CLINICIAN

HCPCS H0005: Alcohol/Drug Group Counseling by a Clinician

HCPCS-H0006-ALCOHOL-DRUG-CASE-MANAGEMENT

HCPCS H0006: Alcohol and/or Drug Services, Case Management

HCPCS-H0007-ALCOHOL-DRUG-CRISIS-INTERVENTION-OUTPATIENT

HCPCS H0007: Alcohol and/or Drug Crisis Intervention, Outpatient

HCPCS-H0008-SUB-ACUTE-DETOXIFICATION-HOSPITAL-INPATIENT

HCPCS H0008: Sub-acute Detoxification, Hospital Inpatient

HCPCS-H0009-ACUTE-DETOXIFICATION-HOSPITAL-INPATIENT

HCPCS H0009: Alcohol and/or Drug Services, Acute Detoxification (Hospital Inpatient)

HCPCS-H0010-SUB-ACUTE-RESIDENTIAL-DETOXIFICATION

HCPCS H0010: Sub-Acute Residential Detoxification Services

Showing 1–10 of 93

Frequently Asked Questions

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
`22`	Increased procedural services	Use when the home visit requires substantially greater resources or complexity than typical (extensive counseling, multi-disciplinary coordination).
`23`	Unusual anesthesia	Not commonly used for home visits; not typical for `H1004` but included when unusual anesthesia circumstances occur during a related procedure.
`52`	Reduced services	Use if the encounter was partially performed or truncated and not delivered in full.
`53`	Discontinued procedure	Use when the home visit was started but discontinued due to patient condition or safety concerns.
`54`	Surgical care only	Not generally applicable; reserved for surgical-related billing components.
`55`	Postoperative management only	Not applicable to `H1004` except when billing separate postoperative care services.
`56`	Preoperative management only	Rarely applicable; include only if the visit was strictly preoperative evaluation tied to obstetric surgery.
`62`	Two surgeons	Not applicable to routine home visits; include if two clinicians with separate surgical roles are involved in related services.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist in assistant-at-surgery role	Use when an advanced practice clinician provided service in an assistant capacity for a procedure associated with the visit.
`CO`	Distinct procedural service — outpatient Hospital Cost outlier	Use per payer rules when the service qualifies for outpatient cost considerations as distinct from inpatient billing.
`CQ`	Service furnished under contract to the Indian Health Service (IHS) or tribal organization by a physician or other practitioner	Use when the home visit is furnished under such a contract.
`QK`	Medical direction of two, three, or four concurrent anesthesia procedures involving qualified individuals	Not typically used for `H1004`; listed only when anesthesia direction is part of associated services.
`QX`	CRNA service with medical direction by a physician	Not typical for prenatal home visit; include only when anesthesia resources are billed in conjunction with the encounter.
`QY`	Medical direction of one CRNA by an anesthesiologist	Not typical; include only when directly relevant to associated procedures.

Taxonomy Code	Specialty	Notes
`251B00000X`	Obstetrics & Gynecology	Physicians who oversee prenatal care and coordinate high-risk prenatal services.
`363L00000X`	Nurse Midwife	Midwives who commonly perform home prenatal visits and enhanced prenatal services.
`367A00000X`	Nurse Practitioner	Family or women’s health NPs who provide home-based prenatal follow-up and care coordination.
`367500000X`	Public Health Nurse	Nurses focused on community-based prenatal care, social needs assessment, and home visiting.
`206E00000X`	Case Manager	Clinical case managers who coordinate referrals and manage care plans for high-risk pregnant patients.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`O09.212`	Supervision of pregnancy with history of preterm labor, second trimester	High-risk surveillance reason prompting enhanced prenatal home follow-up.
`O10.013`	Pre-existing hypertension complicating pregnancy, second trimester	Chronic maternal conditions requiring home monitoring and coordination.
`O24.410`	Gestational diabetes mellitus in pregnancy, diet controlled	Metabolic conditions managed with education and home follow-up.
`Z59.0`	Homelessness	Social determinant that justifies home visits and care coordination.
`Z63.5`	Disruption of family by separation and divorce	Psychosocial stressor relevant to enhanced prenatal services.
`O36.592`	Maternal care for other suspected fetal abnormality, third trimester	Indication for intensified surveillance and follow-up.
`Z55.9`	Problem related to education and literacy, unspecified	May affect comprehension of prenatal instructions and necessitate home education.
`Z71.3`	Dietary counseling and surveillance	Common service component during enhanced prenatal home visits.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`59425`	Antepartum care only; 4-6 visits, vaginal delivery not included	May represent concurrent or alternative billed antepartum visit bundles when services occur in clinic instead of home.
`59426`	Delivery and postpartum care, vaginal delivery	Related when the prenatal home visit leads to delivery planning and eventual delivery services.
`59430`	Postpartum care only	Follow-up home visit may transition to postpartum home care services billed separately.
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Comparable level E/M code when a brief problem-focused prenatal assessment occurs in an outpatient setting rather than a home visit.
`99401`	Prevention counseling; individual, approximately 15 minutes	Counseling or education components delivered during the home visit may align with preventive counseling CPTs when billed separately.

HCPCS H0001: Alcohol and/or Drug Assessment

HCPCS-H0002-BEHAVIORAL-HEALTH-SCREENING-ADMISSION-ELIGIBILITY

HCPCS H0002: Behavioral Health Screening for Admission to Treatment Program

HCPCS-H0003-ALCOHOL-DRUG-SCREENING-LAB-ANALYSIS

HCPCS H0003: Alcohol and/or Drug Screening, Laboratory Analysis

HCPCS-H0004-BEHAVIORAL-HEALTH-COUNSELING-15-MINUTE

HCPCS H0004: Behavioral Health Counseling and Therapy, 15 Minutes

HCPCS-H0005-GROUP-COUNSELING-SUBSTANCE-USE-CLINICIAN

HCPCS H0005: Alcohol/Drug Group Counseling by a Clinician

HCPCS-H0006-ALCOHOL-DRUG-CASE-MANAGEMENT

HCPCS H0006: Alcohol and/or Drug Services, Case Management

HCPCS-H0007-ALCOHOL-DRUG-CRISIS-INTERVENTION-OUTPATIENT

HCPCS H0007: Alcohol and/or Drug Crisis Intervention, Outpatient

HCPCS-H0008-SUB-ACUTE-DETOXIFICATION-HOSPITAL-INPATIENT

HCPCS H0008: Sub-acute Detoxification, Hospital Inpatient

HCPCS-H0009-ACUTE-DETOXIFICATION-HOSPITAL-INPATIENT

HCPCS H0009: Alcohol and/or Drug Services, Acute Detoxification (Hospital Inpatient)

HCPCS-H0010-SUB-ACUTE-RESIDENTIAL-DETOXIFICATION

HCPCS H0010: Sub-Acute Residential Detoxification Services

Showing 1–10 of 93

Frequently Asked Questions

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.

Published by

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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HCPCS H1004: Prenatal At-Risk Enhanced Service, Follow-Up Home Visit

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Billing Code Overview

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HCPCS H1004: Prenatal At-Risk Enhanced Service, Follow-Up Home Visit

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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

HCPCS H1004: Prenatal At-Risk Enhanced Service, Follow-Up Home Visit

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Billing Code Overview

HCPCS H1004: Prenatal At-Risk Enhanced Service, Follow-Up Home Visit

Sign up for hcpcs H1004 policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What clinical situation does H1004 represent and where is the service typically provided?

Which modifiers are relevant when billing H1004?

Which clinician specialties or taxonomy codes are associated with H1004?

How does H1004 relate to other CPT codes like 59425, 99213, or 99401?

Which payers are referenced for H1004 coverage and does the page provide reimbursement rates?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What clinical situation does H1004 represent and where is the service typically provided?

Which modifiers are relevant when billing H1004?

Which clinician specialties or taxonomy codes are associated with H1004?

How does H1004 relate to other CPT codes like 59425, 99213, or 99401?

Which payers are referenced for H1004 coverage and does the page provide reimbursement rates?

References