MS. WENDY CRISTINA PERDOMO PENA M.D.
Prescription History 1659934412
Internal Medicine - Rheumatology in Mountain View, CA

Active since April 17, 2019PECOS EnrolledAccepts Medicare Assignment
94.24/100
CMS Quality Rating
2495 HOSPITAL DR STE 450, MOUNTAIN VIEW, CA 94040(408) 871-3400 Get Directions

NPPES record last updated: October 17, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Aug 22, 2022, Aug 15, 2022, Dec 5, 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 MS. WENDY CRISTINA PERDOMO PENA M.D., an active Rheumatology specialist practicing in Mountain View, CA. Our medical registry currently tracks 2 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 34 documented patient claims. Among these therapy options, the most frequently utilized medication is Hydroxychloroquine Sulfate, which accounts for 17 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
34
Total Claims
56
30-Day Fills
Hydroxychloroquine Sulfate
Most Prescribed · 17 claims
View details
2 medications · 2023 Medicare Part D
Medicare Part D medications prescribed by MS. WENDY CRISTINA PERDOMO PENA M.D. in 2023, with prescription volumes, average cost per fill, and CA state comparisons
Medication Prescriptions (2023)Rx (2023) Avg Cost per FillCost / Fill Vs. Other CA PrescribersVs. CA Avg
Hydroxychloroquine Sulfate17$41.41▼ below CA avg Less than typical

About Hydroxychloroquine Sulfate: Hydroxychloroquine is used to prevent or treat malaria caused by mosquito bites. Show more ▾

The United States Center for Disease Control provides updated guidelines and travel recommendations for the prevention and treatment of malaria in different parts of the world. Discuss the most recent information with your doctor before traveling to areas where malaria occurs. This medication is also used to treat certain auto-immune diseases (lupus, rheumatoid arthritis). It belongs to a class of medications known as disease-modifying antirheumatic drugs (DMARDs). It can reduce skin problems in lupus and prevent swelling/pain in arthritis. Hydroxychloroquine is not recommended for coronavirus infection, also known as COVID-19, unless you are enrolled in a study. Talk to your doctor about the risks and benefits. A chemotherapeutic agent that acts against erythrocytic forms of malarial parasites. Hydroxychloroquine appears to concentrate in food vacuoles of affected protozoa. It inhibits plasmodial heme polymerase. (From Gilman et al., Goodman and Gilman's The Pharmacological Basis of Therapeutics, 9th ed, p970)

In 2023, this provider wrote 17 Medicare prescriptions for Hydroxychloroquine Sulfate, about 19% of the volume of the typical California prescriber of this medication (88). Medicare paid an average of $41.41 per fill, versus $68.60 statewide.

How often this provider prescribes it

This provider
17
CA average
88.0

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

What Medicare paid per fill

This provider
$41.41
CA average
$68.60

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

33
30-Day Fills
standardized to 30-day supplies
990
Days of Medication
total across all patients in 2023
Prednisone17$14.16 Less than typical

About Prednisone: Prednisone is used to treat conditions such as arthritis, blood disorders, breathing problems, severe allergies, skin diseases, cancer, eye problems, and immune system disorders. Show more ▾

Prednisone belongs to a class of drugs known as corticosteroids. It decreases your immune system's response to various diseases to reduce symptoms such as swelling and allergic-type reactions. A synthetic anti-inflammatory glucocorticoid derived from CORTISONE. It is biologically inert and converted to PREDNISOLONE in the liver.

In 2023, this provider wrote 17 Medicare prescriptions for Prednisone, about half the volume of the typical California prescriber of this medication (40). Medicare paid an average of $14.16 per fill, versus $8.18 statewide.

How often this provider prescribes it

This provider
17
CA average
40.0

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

What Medicare paid per fill

This provider
$14.16
CA average
$8.18

Gross Part D cost per fill; not the patient's out-of-pocket price.

22.9
30-Day Fills
standardized to 30-day supplies
551
Days of Medication
total across all patients in 2023
No medications match the current filters.
More than typical Typical Less than typical= prescription volume vs the average CA prescriber of the same medication; volume reflects practice size as well as clinical preference.Green cost= below the CA average cost per fill.

About this data. The prescription history for MS. WENDY CRISTINA PERDOMO PENA M.D. is compiled from the Centers for Medicare & Medicaid Services (CMS) Medicare Part D Prescriber Public Use File for calendar year 2023, 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 Rheumatology prescribing approach at this Mountain View, CA 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 volume among CA prescribers of the same medication. Always confirm current medications and costs directly with the provider and your plan.