Summary & Overview

HCPCS G4014: Nephrology MIPS Specialty Set

HCPCS Level II code G4014 identifies the Nephrology MIPS specialty set, a designation linked to quality reporting and performance measurement for nephrology clinicians. Nationally, codes that map to specialty MIPS sets matter because they guide standardized quality reporting, influence performance-based payment adjustments, and help align clinical practice with measurable outcomes.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. These payers engage with MIPS reporting and apply quality data to credentialing, network participation, and value-based payment programs.

Readers will learn what G4014 represents, the clinical context for nephrology-focused performance measurement, and which payers typically interact with such reporting designations. The publication provides benchmarks for common reporting practices, recent policy updates affecting MIPS specialty sets, and operational implications for nephrology service lines. It also summarizes typical sites of service and the role of the code in ambulatory nephrology settings.

Data not available in the input is noted where specific reimbursement, associated taxonomies, ICD-10 mappings, or related service-line details are not provided.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareG4014HCPCS Level IINephrologyMIPSQuality reportingPerformance measuresAmbulatory careValue-based care

Billing Code Overview

HCPCS Level II code G4014 denotes the Nephrology MIPS specialty set. This code identifies services and reporting elements associated with nephrology clinicians participating in MIPS (Merit-based Incentive Payment System) performance measurement.

Service type: Quality reporting and performance measurement activities tied to nephrology practice
Typical site of service: Outpatient nephrology clinics and other ambulatory care settings where nephrology clinicians deliver care and report performance measures

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A typical outpatient nephrology practice submits the MIPS specialty set reporting under G4014 for performance measurement and quality reporting related to kidney disease care. A representative patient is a 62-year-old male with stage 3 chronic kidney disease (CKD) referred for nephrology follow-up after primary care detection of elevated serum creatinine and proteinuria. Clinic workflow: the patient checks in to an ambulatory nephrology clinic, vitals and recent laboratory results (BMP, urine albumin-to-creatinine ratio) are reviewed by nursing staff, the nephrologist performs a targeted history and physical focused on blood pressure control, medication reconciliation (including ACE inhibitor/ARB use), cardiovascular risk, and CKD progression risk. The clinician documents care, updates the problem list with relevant ICD-10 codes, and completes MIPS specialty set measures via the electronic health record. Ancillary activities may include ordering renal ultrasound, adjusting antihypertensive regimen, counseling on sodium and protein intake, and scheduling follow-up or referral for dialysis education if progression suggests. Typical site of service is an ambulatory nephrology clinic or outpatient physician office. Common payors for reporting include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work required is substantially greater than typically required for the service for complex nephrology consultations or extended documentation beyond typical MIPS reporting tasks.
`23`	Unusual anesthesia	Use when medically necessary anesthesia is provided for procedures related to kidney care in the outpatient setting.
`52`	Reduced services	Use when the reported service was partially reduced or eliminated at the physician's discretion during an encounter relevant to nephrology reporting.
`53`	Discontinued procedure	Use when a planned procedure is started but terminated due to patient condition, applicable if a diagnostic procedure is aborted.
`54`	Surgical care only	Use when the surgeon provides only the surgical component and another physician provides pre/postoperative care, for nephrology-related procedures that are surgical.
`55`	Postoperative management only	Use when the physician provides only postoperative management relevant to renal surgery or vascular access care.
`56`	Preoperative management only	Use when the physician provides only preoperative evaluation relevant to nephrology procedures.
`62`	Two surgeons	Use when two surgeons share surgical responsibilities for a complex renal procedure.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when an advanced practice clinician assists in a nephrology-related surgical procedure.
`CO`	Workers' compensation	Use when the service is related to workers' compensation coverage.
`CQ`	Service furnished as part of a clinical trial, non-device trial	Use when care is provided as part of a qualifying clinical trial related to kidney disease.
`FX`	Split (two-phase) care — global service not split	Use when care is split between providers but billing requires full global for nephrology-related procedure (rare usage per payer guidance).
`FY`	Stage II or III recovery	Use for reporting stage of recovery when required by specific payor or registry for procedural aftercare.
`QK`	Medical direction of two, three, or four CRNAs by an anesthesiologist	Use when nephrology-related procedures requiring anesthesia involve CRNA direction.
`QX`	CRNA service furnished under medical direction by a physician	Use when a CRNA provides anesthetic services under physician direction during a nephrology procedure.

Taxonomy Code	Specialty	Notes
`2080P0207X`	Nephrology	Primary specialty performing CKD management and MIPS specialty set reporting.
`207R00000X`	Internal Medicine	Common referring and co-managing specialty for CKD patients in ambulatory settings.
`207L00000X`	Cardiovascular Disease	Often co-manages hypertension and cardiovascular risk in patients with CKD.
`2086S0125X`	Nurse Practitioner	Advanced practice clinicians who frequently manage follow-up visits and MIPS documentation in nephrology clinics.
`363A00000X`	Physician Assistant	Physician assistants commonly provide clinic care and assist with procedural coordination for nephrology services.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`N18.3`	Chronic kidney disease, stage 3 (moderate)	Common stage seen in nephrology outpatient clinics; MIPS nephrology measures often apply to CKD management.
`N18.4`	Chronic kidney disease, stage 4 (severe)	Advanced CKD where intensified monitoring, medication adjustments, and referral planning occur.
`N18.5`	Chronic kidney disease, stage 5 (kidney failure)	Indicates progression toward end-stage renal disease requiring dialysis planning.
`I12.0`	Hypertensive chronic kidney disease with stage 5 CKD or ESRD	Hypertension-related CKD commonly addressed in nephrology care and quality reporting.
`I13.0`	Hypertensive heart and chronic kidney disease with stage 1 through stage 4 CKD	Reflects combined cardiovascular and renal disease relevant to management and outcomes reporting.
`R80.9`	Proteinuria, unspecified	Proteinuria is a key marker of kidney damage and often triggers nephrology referral and MIPS tracking.
`E11.22`	Type 2 diabetes mellitus with diabetic chronic kidney disease	Diabetes is a leading cause of CKD; nephrology management addresses glycemic effects on kidney function.
`Z99.2`	Dependence on renal dialysis	Used when patients are receiving chronic dialysis; relevant for transition-of-care measures and reporting.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Common follow-up visit code used in outpatient nephrology clinics to manage CKD and complete MIPS-related documentation.
`99203`	Office or other outpatient visit for the evaluation and management of a new patient, typically 30 minutes	Used for initial nephrology consultations where baseline assessment and MIPS specialty set measures are completed.
`50300`	Kidney biopsy; needle or trocar, without imaging guidance	Performed when diagnostic tissue is required for nephrology diagnosis; may occur after initial evaluation and MIPS documentation.
`50320`	Renal biopsy, percutaneous, with imaging guidance (eg, ultrasound)	Performed with image guidance when tissue diagnosis is required; pre- and post-procedure care coordinate with nephrology MIPS reporting.
`90935`	Hemodialysis procedure with single evaluation by a physician or other qualified health care professional	Relevant when patients progress to dialysis and nephrology documents dialysis initiation and quality measures.