`Q5111` Injection, udenyca 0.5 mg

Injection, pegfilgrastim-cbqv (udenyca), biosimilar, 0.5 mg

Medicare coverage: Carrier judgment
Status: active (October 2026 file)

Medically Unlikely Edits (effective October 1, 2026)

Practitioner: max 12 units per day (clinical), rationale: Prescribing Information
Outpatient hospital: max 12 units per day (clinical), rationale: Prescribing Information
DME supplier: max 0 units per day (clinical), rationale: CMS Policy

Medicare pricing for Q5111

Medicare Part B drug payment limit (ASP, October 2026)

Q5111 payment limit: $128.967 per 0.5 MG, effective October 1, 2026 through December 31, 2026, based on 2Q26 ASP data. Coinsurance 20%. Note: AMP-based payment limit.

NDCs that bill under Q5111 (CMS ASP NDC-HCPCS crosswalk, October 2026)

69448-0025-63 Udenyca, Accord BioPharma, Inc: 12 billing units per package (1 SYRINGE in 1 CARTON / .6 mL in 1 SYRINGE)
69448-0026-63 Udenyca, Accord BioPharma, Inc: 12 billing units per package (1 SYRINGE in 1 CARTON / .6 mL in 1 SYRINGE)
70114-0101-01 Udenyca, Coherus BioSciences, Inc.: 12 billing units per package (1 SYRINGE in 1 CARTON / .6 mL in 1 SYRINGE)
70114-0120-01 Udenyca, Coherus BioSciences, Inc.: 12 billing units per package (1 SYRINGE in 1 CARTON / .6 mL in 1 SYRINGE)
70114-0130-01 Udenyca, Coherus BioSciences, Inc.: 12 billing units per package (1 SYRINGE in 1 CARTON / .6 mL in 1 SYRINGE)
69448-0027-63 Udenyca Onbody, Accord BioPharma, Inc: 12 billing units per package (1 SYRINGE in 1 CARTON / .6 mL in 1 SYRINGE)

Physician Fee Schedule (CY 2026, RVU26D)

Status E: excluded from the PFS by regulation.

Payer policies and prior authorization for Q5111

180 of 180 payer prior-auth lists that name Q5111 require prior authorization or set conditions: Aetna, Arkansas Blue Cross and Blue Shield, Blue Cross Blue Shield of Arizona (AZ Blue), Blue Cross and Blue Shield of Illinois, Blue Cross and Blue Shield of Texas, Blue Shield of California Promise Health Plan, CarePlus Health Plans, Cigna, HealthSpring, Humana, Molina Complete Care (Virginia), Molina Healthcare of Arizona, Molina Healthcare of California, Molina Healthcare of Idaho, Molina Healthcare of Illinois, Molina Healthcare of Iowa, Molina Healthcare of Michigan, Molina Healthcare of Mississippi, Molina Healthcare of Nevada, Molina Healthcare of New Mexico, and others.

Payer	Plan	State	Prior auth	Conditions	Since	Source
Arkansas Blue Cross and Blue Shield	Drugs under the medical benefit (not ASE/PSE or FEP, which use EBRx and Prime)	AR	prior auth required	Non-preferred product	Jan 1, 2024	Medical Benefit Pharmacy Prior Approval List
Blue Cross Blue Shield of Arizona (AZ Blue)	AZ Blue-administered Medicare Advantage (M2K)	AZ	prior auth required	Oncology dx: eviCore	Sep 1, 2026	AZ Blue Medicare Advantage Prior Authorization Requirements Code List (Effective 09/01/2026)
Blue Cross Blue Shield of Arizona (AZ Blue)	AZ Blue-administered Medicare Advantage (M2K)	AZ	prior auth required	Non-oncology dx: AZ Blue	Sep 1, 2026	AZ Blue Medicare Advantage Prior Authorization Requirements Code List (Effective 09/01/2026)
Blue Cross Blue Shield of Arizona (AZ Blue)	Federal Employee Program (FEP)	AZ	prior auth required		Sep 1, 2026	Federal Employee Program (FEP) Prior Authorization Requirements Code List (Updated 09/01/2026)
Blue Cross Blue Shield of Arizona (AZ Blue)	Standard PA code list (most commercial plans)	AZ	prior auth under conditions	place of service 19, 22; site of care: outpatient hospital	Sep 1, 2026	AZ Blue Standard Prior Authorization Requirements Code List (09/01/2026)
Blue Cross Blue Shield of Arizona (AZ Blue)	Standard PA code list (most commercial plans)	AZ	prior auth under conditions	eviCore-delegated groups, all sites	Sep 1, 2026	AZ Blue Standard Prior Authorization Requirements Code List (09/01/2026)
Blue Cross Blue Shield of Arizona (AZ Blue)	State of Arizona employee group (SYD, S3Z)	AZ	prior auth required		Sep 1, 2026	State of Arizona Group Prior Authorization Requirements Code List (09/01/2026)
Blue Cross Blue Shield of Arizona (AZ Blue)	Teamsters group (TYW)	AZ	prior auth under conditions	place of service 19, 22; site of care: outpatient hospital	Sep 1, 2026	Teamsters Group Prior Authorization Requirements Code List (Updated 09/01/2026)
Blue Shield of California Promise Health Plan	Promise Health Plan Medi-Cal	CA	prior auth required		Sep 1, 2026	Medi-Cal Prior Authorization List
Aetna	Medicare Advantage	All	prior auth required	Step therapy applies	Aug 25, 2026	Aetna Medicare Part B drug list (partbname.xml)
Aetna	Medicare Advantage	All	prior auth required		Oct 1, 2026	Participating provider precertification list for Aetna®
Aetna	Commercial	All	prior auth required		Oct 1, 2026	Participating provider precertification list for Aetna®
Cigna	ACA/IFP	All	prior auth required	May be delegated to eviCore for some clients	Jan 1, 2019	Master Precertification List (For Health Care Providers)
Cigna	Basic Standard	All	prior auth required	May be delegated to eviCore for some clients	Jan 1, 2019	Master Precertification List (For Health Care Providers)
Cigna	Complete/PHS+/Preferred	All	prior auth required	May be delegated to eviCore for some clients	Jan 1, 2019	Master Precertification List (For Health Care Providers)
Blue Cross and Blue Shield of Illinois	Blue Cross Community Health Plans (BCCHP), Illinois Medicaid	IL	prior auth required	Carelon-managed	Aug 1, 2025	Illinois Medicaid Prior Authorization Code List, Effective 10/1/2026
Blue Cross and Blue Shield of Texas	Texas PA exemption (gold card), outpatient, fully insured	TX	prior auth required	Gold-card exemption available	Jul 1, 2026	BCBSTX Outpatient Prior Authorization Exemption Clinical Guidelines (max units, PA exempt date range)
HealthSpring	Medicare Advantage	All	prior auth required		Jan 1, 2025	2026 Q4 Prior Authorization List
CarePlus Health Plans	CarePlus Health Plans	FL	prior auth required	NDC required	Jan 1, 2027	Medicare Advantage and Dual Eligible Special Needs Plans Prior Authorization and Notification List We have updated our CarePlus Health Plans Prior Authorization and Notification List for CarePlus Medi
CarePlus Health Plans	CarePlus Health Plans	FL	prior auth required	NDC required	Jan 1, 2027	Medicare Advantage and Dual Eligible Special Needs Plans Prior Authorization and Notification List We have updated our CarePlus Health Plans Prior Authorization and Notification List for CarePlus Medi
CarePlus Health Plans	CarePlus Health Plans	FL	prior auth required	NDC required	Jan 1, 2027	Medicare Advantage and Dual Eligible Special Needs Plans Prior Authorization and Notification List We have updated our CarePlus Health Plans Prior Authorization and Notification List for CarePlus Medi
Humana	Humana D-SNP (FL)	FL	prior auth required	NDC required	Jul 1, 2026	H1036-280 Humana Fully Integrated Florida prior authorization and notification list
Humana	Humana D-SNP (FL)	FL	prior auth required	NDC required	Jul 1, 2026	H1036-280 Humana Fully Integrated Florida prior authorization and notification list
Humana	Humana D-SNP (FL)	FL	prior auth required	NDC required	Jul 1, 2026	H1036-280 Humana Fully Integrated Florida prior authorization and notification list
Humana	Humana D-SNP (IL)	IL	prior auth required	NDC required	Jan 1, 2027	Humana Dual Fully Integrated Illinois prior authorization and notification list
Humana	Humana D-SNP (IL)	IL	prior auth required	NDC required	Jan 1, 2027	Humana Dual Fully Integrated Illinois prior authorization and notification list
Humana	Humana D-SNP (IL)	IL	prior auth required	NDC required	Jan 1, 2027	Humana Dual Fully Integrated Illinois prior authorization and notification list
Humana	Humana D-SNP (IN)	IN	prior auth required	NDC required	Jan 1, 2027	Humana PathWays Dual Care (HMO-POS D-SNP) prior authorization and notification list Important notes:
Humana	Humana D-SNP (IN)	IN	prior auth required	NDC required	Jan 1, 2027	Humana PathWays Dual Care (HMO-POS D-SNP) prior authorization and notification list Important notes:
Humana	Humana D-SNP (IN)	IN	prior auth required	NDC required	Jan 1, 2027	Humana PathWays Dual Care (HMO-POS D-SNP) prior authorization and notification list Important notes:
Humana	Humana D-SNP (MI)	MI	prior auth required	NDC required	Oct 14, 2026	Humana Dual Integrated (health maintenance organization Dual Eligible Special Needs Plan (HMO D- SNP) Michigan prior authorization and notification list (PAL)
Humana	Humana D-SNP (MI)	MI	prior auth required	NDC required	Oct 14, 2026	Humana Dual Integrated (health maintenance organization Dual Eligible Special Needs Plan (HMO D- SNP) Michigan prior authorization and notification list (PAL)
Humana	Humana D-SNP (MI)	MI	prior auth required	NDC required	Oct 14, 2026	Humana Dual Integrated (health maintenance organization Dual Eligible Special Needs Plan (HMO D- SNP) Michigan prior authorization and notification list (PAL)
Humana	Humana D-SNP (SC)	SC	prior auth required	NDC required	Jul 1, 2026	Humana Dual Integrated South Carolina prior authorization and notification list
Humana	Humana D-SNP (SC)	SC	prior auth required	NDC required	Jul 1, 2026	Humana Dual Integrated South Carolina prior authorization and notification list
Humana	Humana D-SNP (SC)	SC	prior auth required	NDC required	Jul 1, 2026	Humana Dual Integrated South Carolina prior authorization and notification list
Humana	Humana D-SNP (VA)	VA	prior auth required	NDC required	Jul 1, 2026	Prior authorization and notification list Humana Dual Fully Integrated H2875-001 (Virginia) Humana Dual Fully Integrated H2875-003 (Virginia)
Humana	Humana D-SNP (VA)	VA	prior auth required	NDC required	Jul 1, 2026	Prior authorization and notification list Humana Dual Fully Integrated H2875-001 (Virginia) Humana Dual Fully Integrated H2875-003 (Virginia)
Humana	Humana D-SNP (VA)	VA	prior auth required	NDC required	Jul 1, 2026	Prior authorization and notification list Humana Dual Fully Integrated H2875-001 (Virginia) Humana Dual Fully Integrated H2875-003 (Virginia)
Humana	Humana Healthy Horizons	FL	prior auth required	NDC required	Jan 1, 2027	Humana Healthy Horizons in Florida Prior Authorization and Notification List
Humana	Humana Healthy Horizons	FL	prior auth required	NDC required	Jan 1, 2027	Humana Healthy Horizons in Florida Prior Authorization and Notification List
Humana	Humana Healthy Horizons	FL	prior auth required	NDC required	Jan 1, 2027	Humana Healthy Horizons in Florida Prior Authorization and Notification List
Humana	Humana Healthy Horizons	KY	prior auth required	NDC required	Oct 7, 2026	Humana Healthy Horizons in Kentucky Prior Authorization and Notification List
Humana	Humana Healthy Horizons	KY	prior auth required	NDC required	Oct 7, 2026	Humana Healthy Horizons in Kentucky Prior Authorization and Notification List
Humana	Humana Healthy Horizons	KY	prior auth required	NDC required	Oct 7, 2026	Humana Healthy Horizons in Kentucky Prior Authorization and Notification List
Humana	Humana Healthy Horizons	LA	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in Louisiana Prior Authorization and Notification List
Humana	Humana Healthy Horizons	LA	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in Louisiana Prior Authorization and Notification List
Humana	Humana Healthy Horizons	LA	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in Louisiana Prior Authorization and Notification List
Humana	Humana Healthy Horizons	OH	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in Ohio prior authorization and notification List
Humana	Humana Healthy Horizons	OH	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in Ohio prior authorization and notification List
Humana	Humana Healthy Horizons	OH	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in Ohio prior authorization and notification List
Humana	Humana Healthy Horizons	SC	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in South Carolina prior authorization and notification list
Humana	Humana Healthy Horizons	SC	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in South Carolina prior authorization and notification list
Humana	Humana Healthy Horizons	SC	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in South Carolina prior authorization and notification list
Humana	Humana Healthy Horizons	VA	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in Virginia professionally administered medication prior authorization and notification list
Humana	Humana Healthy Horizons	VA	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in Virginia professionally administered medication prior authorization and notification list
Humana	Humana Healthy Horizons	VA	prior auth required	NDC required	Oct 14, 2026	Humana Healthy Horizons in Virginia professionally administered medication prior authorization and notification list
Humana	Humana MA and D-SNP	All	prior auth required	NDC required	Jan 1, 2027	Medicare Advantage and Dual Eligible Special Needs Plans prior authorization and notification list Important notes:
Humana	Humana MA and D-SNP	All	prior auth required	NDC required	Jan 1, 2027	Medicare Advantage and Dual Eligible Special Needs Plans prior authorization and notification list Important notes:
Humana	Humana MA and D-SNP	All	prior auth required	NDC required	Jan 1, 2027	Medicare Advantage and Dual Eligible Special Needs Plans prior authorization and notification list Important notes:
Molina Complete Care (Virginia)	Medicare-only PA matrix for D-SNP	VA	prior auth required		Jan 1, 2022	Medicare Prior Auth (PA) Code Matrix (Virginia), effective Q1 2022
Molina Complete Care (Virginia)	Medicaid	VA	prior auth required		Apr 1, 2025	Virginia Medicaid PA Code Matrix and Virginia code/benefit exceptions, effective Q2 2025
Molina Healthcare of Arizona	Medicare-only PA matrix for D-SNP	AZ	prior auth required		Jan 1, 2022	Medicare Prior Auth (PA) Code Matrix (Arizona), effective Q1 2022
Molina Healthcare of California	Medicaid	CA	prior auth required		Apr 1, 2026	Medicaid Prior Auth (PA) Code Matrix (California), effective Q2 2026
Molina Healthcare of California	Medicare Advantage	CA	prior auth required		Jul 1, 2021	Medicare Prior Auth (PA) Code Matrix (California), effective Q3 2021
Molina Healthcare of Idaho	Medicaid	ID	prior auth required		Jan 1, 2025	Idaho Medicaid Prior Auth (PA) Code Matrix and Idaho code/benefit exceptions, Q1 2025
Molina Healthcare of Illinois	Medicaid	IL	prior auth required		Jan 1, 2022	Molina Healthcare of Illinois Codification Grid Q3 2026
Molina Healthcare of Iowa	Medicaid	IA	prior auth required		Jul 1, 2023	IA Prior Authorization Matrix, effective Q3 2023
Molina Healthcare of Michigan	Medicare Advantage	MI	prior auth required		Jul 1, 2026	Molina Healthcare of Michigan PA Matrix 2026-Q3
Molina Healthcare of Michigan	Medicaid	MI	prior auth required		Jul 1, 2026	Molina Healthcare of Michigan PA Matrix 2026-Q3
Molina Healthcare of Michigan	Exchange	MI	prior auth required		Jul 1, 2021	Molina Healthcare of Michigan PA Matrix, effective 7/1/2021
Molina Healthcare of Mississippi	Medicaid	MS	prior auth required	cancer dx via Evolent	Jan 1, 2025	Mississippi Medicaid Prior Auth (PA) Code Matrix and exceptions, effective Q1 2025
Molina Healthcare of Nevada	Medicaid	NV	prior auth required	cancer dx via NCH	Oct 1, 2022	Medicaid Prior Auth (PA) Code Matrix, effective Q4 2022
Molina Healthcare of New Mexico	Medicare Advantage	NM	prior auth required		Jan 1, 2021	Medicare Prior Auth (PA) Code Matrix (New Mexico), effective Q1 2021
Molina Healthcare of New Mexico	Medicaid	NM	prior auth required		Jul 1, 2026	New Mexico Medicaid Prior Auth (PA) Code Matrix, effective July 1, 2026
Molina Healthcare of Ohio	Medicaid and MyCare Ohio (MMP) Medicaid	OH	prior auth required		Oct 1, 2023	Molina Healthcare of Ohio Prior Authorization (PA) Code List, effective 2023-10-01
Molina Healthcare of Ohio	Medicare and MyCare Ohio (MMP) Medicare	OH	prior auth required		Oct 1, 2023	Molina Healthcare of Ohio Prior Authorization (PA) Code List, effective 2023-10-01
Molina Healthcare of Ohio	Exchange	OH	prior auth required		Oct 1, 2023	Molina Healthcare of Ohio Prior Authorization (PA) Code List, effective 2023-10-01
Molina Healthcare of Utah	Medicaid	UT	prior auth required		Jan 1, 2025	Utah Medicaid Prior Auth (PA) Code Matrix and Utah code/benefit exceptions, Q1 2025
Molina Healthcare of Wisconsin	Medicare Advantage	WI	prior auth required		Oct 1, 2021	Medicare Prior Auth (PA) Code Matrix (Wisconsin), effective Q4 2021

Payer coverage policies that name Q5111

Q5111 appears in 20 coverage policies from Aetna, Blue Cross & Blue Shield of Mississippi, BlueCross BlueShield of South Carolina, Centene, Cigna, Health Care Service Corporation (BCBS IL, TX, OK, NM, MT), Premera Blue Cross, UnitedHealthcare, Wellmark Blue Cross Blue Shield.

Payer	Policy	Role in policy	Reviewed	Document
Aetna	Hematopoietic Colony-Stimulating Factors (CSFs) (0055)	covered if criteria are met	Jul 16, 2026	payer document
Aetna	Lurbinectedin (Zepzelca) (0978)	listed, no stance	Mar 11, 2026	payer document
Aetna	Plerixafor (0779)	listed, no stance	Feb 13, 2026	payer document
Blue Cross & Blue Shield of Mississippi	Biosimilar Medications (S.5.01.593)	listed, no stance		payer document
Blue Cross & Blue Shield of Mississippi	Biosimilar Medications (L.5.01.593)	listed, no stance		payer document
BlueCross BlueShield of South Carolina	Hematopoietic Colony-Stimulating Factors (CSFs) (CAM 197) Q5101-ZA \| Injection, filgrastim (G-CSF), biosimilar, 1 microgram [Zarxio]	listed, no stance	Jun 1, 2026	payer document
Centene	Pegfilgrastim (Neulasta, Neulasta Onpro), Pegfilgrastim- unne (Armlupeg), Pegfilgrastim-pccg (Ennumo), Pegfilgrastim-jmdb (Fulphila), Pegfilgrastim-pbbk (Fylnetra), Pegfilgrastim-apgf (Nyvepria), Eflapegrastim-xnst (Rolvedon), Efbemalenograstim alfa-vuxw (Ryzneuta), Pegfilgrastim-fpgk (Stimufend), Pegfilgrastim-cbqv (Udenyca, Udenyca Autoinjector, Udenyca Onbody), Pegfilgrastim-bmez (Ziextenzo) (CP.PHAR.296)	covered if criteria are met	Aug 1, 2026	payer document
Cigna	Colony Stimulating Factors – Pegfilgrastim Products (IP0070)	covered if criteria are met	Mar 1, 2026	payer document
Health Care Service Corporation (BCBS IL, TX, OK, NM, MT)	Oncology and Supportive Care Medications (RX502.061) tqjs \| Hybreza™	listed, no stance	Jan 1, 2027	payer document
Premera Blue Cross	Use of Granulocyte Colony-Stimulating Factors (G-CSF) (5.01.551)	listed, no stance	Sep 21, 2026	payer document
UnitedHealthcare	Maximum Dosage and Frequency (CS2026D0034AV)	listed, no stance	Aug 1, 2026	payer document
UnitedHealthcare	Maximum Dosage and Frequency (2026D0034AU)	listed, no stance	Aug 1, 2026	payer document
UnitedHealthcare	Maximum Dosage and Frequency (for Ohio Only) (CSOH2026D0034.K)	listed, no stance	May 1, 2026	payer document
UnitedHealthcare	Maximum Dosage and Frequency (for Pennsylvania Only) (CSPA2026D0034AS)	listed, no stance	May 1, 2026	payer document
UnitedHealthcare	Medicare Part B Step Therapy Programs (IAP.001.30) Preferred	listed, no stance	Jul 1, 2026	payer document
UnitedHealthcare	White Blood Cell Colony Stimulating Factors (CS2026D0061AL)	listed, no stance	Sep 1, 2026	payer document
UnitedHealthcare	White Blood Cell Colony Stimulating Factors (2026D0061AE)	listed, no stance	Sep 1, 2026	payer document
UnitedHealthcare	White Blood Cell Colony Stimulating Factors (for Indiana Only) (CSIND0061.14)	listed, no stance	Oct 1, 2025	payer document
UnitedHealthcare	White Blood Cell Colony Stimulating Factors (for Ohio Only) (CSOH2025D0061.D)	listed, no stance	Nov 1, 2025	payer document
Wellmark Blue Cross Blue Shield	Colony Stimulating Factors (05.02.41)	listed, no stance	Jun 1, 2026	payer document

Recent prior-auth changes

Oct 14, 2026: PA removed, Humana
Sep 1, 2026: conditions changed, Oxford Health Plans
Aug 1, 2026: PA removed, Molina Healthcare of Texas
Jul 1, 2026: conditions changed, Oxford Health Plans
Jun 1, 2026: conditions changed, UnitedHealthcare
Jun 1, 2026: conditions changed, UnitedHealthcare Community Plan
May 1, 2026: conditions changed, UnitedHealthcare
Apr 1, 2026: conditions changed, Surest
Apr 1, 2026: conditions changed, UnitedHealthcare Community Plan
Apr 1, 2026: conditions changed, UnitedHealthcare

Medicaid fee-for-service

Prior authorization required or conditional in CO, IN, MS, VA, VT, WA.

AZ: $153.89 (asc), effective Oct 1, 2026
FL: $12.00 (physician_administered_drugs), effective Jan 1, 2026
IL: $135.89 (practitioner), effective Apr 1, 2026
IN: $310.51 (professional, Advanced Practice Nurse (85%), non-facility), effective Jul 1, 2024
KS: $128.97 (asc, facility), effective Oct 1, 2026
KY: $161.99 (asc), effective Jan 1, 2026
MS: $108.83 (comprehensive, facility), effective Oct 1, 2025
NE: $149.13 (injectables), effective Jul 1, 2026
OH: $149.13 (provider_administered_drugs), effective Jul 1, 2026
OK: $149.13 (physician, non-facility), effective Jul 1, 2026
TX: $161.99 (nurse_practitioner_clinical_nurse_specialist, Nurse Practitioner/Clinical Nurse Specialist, non-facility), effective Sep 1, 2026
VA: $149.13 (medical), effective Jul 1, 2026
VT: $80.81 (outpatient_hospital_opps), effective Feb 1, 2026
WA: $149.13 (professional_administered_drugs), effective Jul 1, 2026
WY: $58.82 (outpatient_hospital_apc, Ambulatory Surgical Centers), effective Apr 1, 2026

From payers' published prior-auth lists, coverage policies and state Medicaid fee schedules, updated Oct 16, 2026. The role is what the policy's own code table or text says about the code. Not a guarantee of coverage or payment; verify with the payer. CPT® is a registered trademark of the American Medical Association.

Q5111 Injection, udenyca 0.5 mg