DR. ANNIE DU YANG MD
Prescription History 1962069849
Psychiatry & Neurology - Neurology in Fairfax, VA

Active since May 25, 2019PECOS EnrolledAccepts Medicare Assignment
3620 JOSEPH SIEWICK DR STE 400, FAIRFAX, VA 22033(571) 472-4200(571) 432-3155 Get Directions

NPPES record last updated: September 29, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 30, 2024, Jul 5, 2023, Jun 3, 2019 and 1 more (4 updates tracked since 2019).

Medicare Part D Prescription History

Explore the verified Medicare Part D prescription history, volume metrics, and calculated drug costs for DR. ANNIE DU YANG MD, an active Neurology specialist practicing in Fairfax, VA. Our medical registry currently tracks 2 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 31 documented patient claims. Among these therapy options, the most frequently utilized medication is Gammagard Liquid, which accounts for 18 claims alone. Use the table below to sort by claims, cost, or utilization compared with the state average; select any medication for its full profile.

2
Medications
31
Total Claims
31
30-Day Fills
Gammagard Liquid
Most Prescribed · 18 claims
View details
2 medications · 2024 Medicare Part D
Medicare Part D medications prescribed by DR. ANNIE DU YANG MD in 2024, with prescription volumes, average cost per fill, and VA state comparisons
Medication Prescriptions (2024)Rx (2024) Avg Cost per FillCost / Fill Vs. Other VA PrescribersVs. VA Avg
Gammagard LiquidImmun Glob G(Igg)/Gly/Iga Ov5018$6,783.19▼ below VA avg▼ Less than typical

About Gammagard Liquid: This medication is used in people with a certain type of weakened immune system (primary immune deficiency) to strengthen it and to lower the risk of infection. Show more ▾

This medication is made from human blood that has a high level of antibodies which help fight infections. This product is also used to increase the number of certain blood cells (platelets) in people with a certain blood disorder (idiopathic thrombocytopenic purpura-ITP). Platelets are needed to stop bleeding and to form normal blood clots. In addition, this medication is used to treat a certain nerve disorder (chronic inflammatory demyelinating polyneuropathy-CIDP). This disorder causes weakness and numbness/tingling/pain in the arms and legs. This medication helps to improve these symptoms and prevents relapse.

In 2024, this provider wrote 18 Medicare prescriptions for Gammagard Liquid, about 70% of the volume of the typical Virginia prescriber of this medication (25.8). Medicare paid an average of $6,783.19 per fill, versus $8,451.92 statewide.

How often this provider prescribes it

This provider
18
VA average
25.8

This provider prescribes this medication less often than the average VA prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$6,783.19
VA average
$8,451.92

This provider's average cost per fill is below the VA average for this medication.

18
30-Day Fills
standardized to 30-day supplies
385
Days of Medication
total across all patients in 2024
Gabapentin13$6.08▼ below VA avg▼ Less than typical

About Gabapentin: Gabapentin is used with other medications to prevent and control seizures. Show more ▾

It is also used to relieve nerve pain following shingles (a painful rash due to herpes zoster infection) in adults. Gabapentin is known as an anticonvulsant or antiepileptic drug. A cyclohexane-gamma-aminobutyric acid derivative that is used for the treatment of PARTIAL SEIZURES; NEURALGIA; and RESTLESS LEGS SYNDROME.

In 2024, this provider wrote 13 Medicare prescriptions for Gabapentin, about 15% of the volume of the typical Virginia prescriber of this medication (89.4). Medicare paid an average of $6.08 per fill, versus $13.47 statewide.

How often this provider prescribes it

This provider
13
VA average
89.4

This provider prescribes this medication less often than the average VA prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$6.08
VA average
$13.47

This provider's average cost per fill is below the VA average for this medication.

13.2
30-Day Fills
standardized to 30-day supplies
396
Days of Medication
total across all patients in 2024
No medications match the current filters.
▲ More than typical≈ Typical▼ Less than typical= prescription volume vs the average VA prescriber of the same medication; volume reflects practice size as well as clinical preference.Green cost= below the VA average cost per fill.

About this data. The prescription history for DR. ANNIE DU YANG MD is compiled from the Centers for Medicare & Medicaid Services (CMS) Medicare Part D Prescriber Public Use File for calendar year 2024, the most recent federal release. Figures cover prescriptions filled for Medicare Part D beneficiaries only; prescriptions under private insurance, Medicaid, or self-pay plans are not included. Because prescribing decisions are generally consistent across coverage types, this record offers a useful view of the overall Neurology prescribing approach at this Fairfax, VA practice.

Reading the costs. Drug costs are gross amounts paid to pharmacies under Part D, including both plan and beneficiary payments. They are not the price a patient pays at the pharmacy counter. Medications with fewer than 11 claims are excluded from the federal source data, and state comparisons use the average among VA prescribers of the same medication and form, shown only when at least five prescribers contribute. Always confirm current medications and costs directly with the provider and your plan.

About the medication summaries. Drug use descriptions come from the CMS Medicare Part D Drug Spending Dashboard (2024), and substance definitions from Medical Subject Headings (MeSH) 2026, U.S. National Library of Medicine. They are summaries that do not contain all possible information about a medication and are not individual medical advice. Ask a health care professional about any medication and your specific health needs.