DR. KAREN CHEE M.D.
Prescription History 1487637310
Internal Medicine - Hematology & Oncology in San Mateo, CA

Active since November 23, 2005PECOS EnrolledAccepts Medicare Assignment
75/100
CMS Quality Rating
218 DE ANZA BLVD, SAN MATEO, CA 94402(650) 341-9131(650) 341-9135 Get Directions

NPPES record last updated: June 2, 2011. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Medicare Part D Prescription History

Explore the verified Medicare Part D prescription history, volume metrics, and calculated drug costs for DR. KAREN CHEE M.D., an active Hematology & Oncology specialist practicing in San Mateo, CA. Our medical registry currently tracks 20 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 557 documented patient claims. Among these therapy options, the most frequently utilized medication is Acyclovir, which accounts for 61 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.

20
Medications
557
Total Claims
778
30-Day Fills
Acyclovir
Most Prescribed · 61 claims
View details
20 medications · 2023 Medicare Part D
Medicare Part D medications prescribed by DR. KAREN CHEE 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

About Acyclovir: Acyclovir is used to treat infections caused by certain types of viruses. Show more ▾

It treats cold sores around the mouth (caused by herpes simplex), shingles (caused by herpes zoster), and chickenpox. This medication is also used to treat outbreaks of genital herpes. In people with frequent outbreaks, acyclovir is used to help reduce the number of future episodes. Acyclovir is an antiviral drug. However, it is not a cure for these infections. The viruses that cause these infections continue to live in the body even between outbreaks. Acyclovir decreases the severity and length of these outbreaks. It helps the sores heal faster, keeps new sores from forming, and decreases pain/itching. This medication may also help reduce how long pain remains after the sores heal. In addition, in people with a weakened immune system, acyclovir can decrease the risk of the virus spreading to other parts of the body and causing serious infections. A GUANOSINE analog that acts as an antimetabolite. Viruses are especially susceptible. Used especially against herpes.

In 2023, this provider wrote 61 Medicare prescriptions for Acyclovir, about 2.5 times the volume of the typical California prescriber of this medication (24). Medicare paid an average of $27.03 per fill, versus $26.52 statewide.

How often this provider prescribes it

This provider
61
CA average
24.0

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

What Medicare paid per fill

This provider
$27.03
CA average
$26.52

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

93.2
30-Day Fills
standardized to 30-day supplies
2,795
Days of Medication
total across all patients in 2023

About Jakafi: This medication is used to treat certain bone marrow disorders (myelofibrosis, polycythemia vera). Show more ▾

It works by blocking your body from producing substances called growth factors. Growth factors cause cells to grow and divide, and cause the blood cell and spleen problems found in these disorders. Ruxolitinib belongs to a class of drugs known as kinase inhibitors. Though not a cure for these disorders, ruxolitinib may help with some of the symptoms, including abdominal discomfort, pain under left ribs, early feelings of fullness from meals, night sweats, itching, and bone/muscle pain. Ruxolitinib is also used to treat a certain problem that may occur after certain stem cell or bone marrow transplants (graft versus host disease). It works by weakening your body's defense system (immune system).

In 2023, this provider wrote 48 Medicare prescriptions for Jakafi, about 1.8 times the volume of the typical California prescriber of this medication (26). Medicare paid an average of $13,469.10 per fill, versus $15,930.09 statewide.

How often this provider prescribes it

This provider
48
CA average
26.0

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

What Medicare paid per fill

This provider
$13,469.10
CA average
$15,930.09

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

50
30-Day Fills
standardized to 30-day supplies
1,488
Days of Medication
total across all patients in 2023

About Eliquis: Apixaban is used to prevent serious blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip/knee replacement surgery. Show more ▾

With atrial fibrillation, part of the heart does not beat the way it should. This can lead to blood clots forming, which can travel to other parts of your body (such as the lungs or legs) or increase your risk for stroke. In the United States, apixaban is also approved to treat certain types of blood clots (deep vein thrombosis-DVT, pulmonary embolus-PE) and to prevent them from forming again. Apixaban is an anticoagulant that works by blocking certain clotting proteins in your blood.

In 2023, this provider wrote 48 Medicare prescriptions for Eliquis, about 71% of the volume of the typical California prescriber of this medication (68). Medicare paid an average of $757.68 per fill, versus $848.49 statewide.

How often this provider prescribes it

This provider
48
CA average
68.0

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
$757.68
CA average
$848.49

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

62
30-Day Fills
standardized to 30-day supplies
1,860
Days of Medication
total across all patients in 2023

About Hydroxyurea: This medication is used by people with sickle cell anemia to reduce the number of painful crises caused by the disease and to reduce the need for blood transfusions. Show more ▾

Some brands are also used to treat certain types of cancer (such as chronic myelogenous leukemia, squamous cell carcinomas). An antineoplastic agent that inhibits DNA synthesis through the inhibition of ribonucleoside diphosphate reductase.

In 2023, this provider wrote 42 Medicare prescriptions for Hydroxyurea, about 1.3 times the volume of the typical California prescriber of this medication (33). Medicare paid an average of $42.01 per fill, versus $42.36 statewide.

How often this provider prescribes it

This provider
42
CA average
33.0

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

What Medicare paid per fill

This provider
$42.01
CA average
$42.36

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

93.3
30-Day Fills
standardized to 30-day supplies
2,800
Days of Medication
total across all patients in 2023

About Prochlorperazine Maleate: This medication is used to treat severe nausea and vomiting from certain causes (for example, after surgery or cancer treatment). Show more ▾

Prochlorperazine belongs to a class of drugs known as phenothiazines. This medication is not recommended for use in children younger than 2 years or in children going through surgery. A phenothiazine antipsychotic used principally in the treatment of NAUSEA; VOMITING; and VERTIGO. It is more likely than CHLORPROMAZINE to cause EXTRAPYRAMIDAL DISORDERS. (From Martindale, The Extra Pharmacopoeia, 30th ed, p612)

In 2023, this provider wrote 42 Medicare prescriptions for Prochlorperazine Maleate, about 1.5 times the volume of the typical California prescriber of this medication (28). Medicare paid an average of $20.06 per fill, versus $18.29 statewide.

How often this provider prescribes it

This provider
42
CA average
28.0

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

What Medicare paid per fill

This provider
$20.06
CA average
$18.29

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

42
30-Day Fills
standardized to 30-day supplies
542
Days of Medication
total across all patients in 2023

About Ondansetron Hcl: This medication is used alone or with other medications to prevent nausea and vomiting caused by cancer drug treatment (chemotherapy) and radiation therapy. Show more ▾

It is also used to prevent and treat nausea and vomiting after surgery. It works by blocking one of the body's natural substances (serotonin) that causes vomiting.

In 2023, this provider wrote 42 Medicare prescriptions for Ondansetron Hcl, about 1.4 times the volume of the typical California prescriber of this medication (30). Medicare paid an average of $15.44 per fill, versus $8.60 statewide.

How often this provider prescribes it

This provider
42
CA average
30.0

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

What Medicare paid per fill

This provider
$15.44
CA average
$8.60

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

42.7
30-Day Fills
standardized to 30-day supplies
576
Days of Medication
total across all patients in 2023

About Xarelto: Rivaroxaban is used to prevent blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip or knee replacement surgery. Show more ▾

It is also used to prevent blood clots from forming in high-risk patients with limited mobility during their hospital stay and after discharge. In addition, rivaroxaban is used to treat blood clots (such as in deep vein thrombosis-DVT or pulmonary embolus-PE) and to prevent the blood clots from forming again. Rivaroxaban may be used in children to prevent blood clots from forming after a certain heart surgery (Fontan procedure). Rivaroxaban is an anticoagulant that works by blocking certain clotting proteins in your blood. A morpholine and thiophene derivative that functions as a FACTOR XA INHIBITOR and is used in the treatment and prevention of DEEP-VEIN THROMBOSIS and PULMONARY EMBOLISM. It is also used for the prevention of STROKE and systemic embolization in patients with non-valvular ATRIAL FIBRILLATION, and for the prevention of atherothrombotic events in patients after an ACUTE CORONARY SYNDROME.

In 2023, this provider wrote 41 Medicare prescriptions for Xarelto, about the same volume as the typical California prescriber of this medication (44). Medicare paid an average of $919.80 per fill, versus $907.01 statewide.

How often this provider prescribes it

This provider
41
CA average
44.0

This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$919.80
CA average
$907.01

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

65.7
30-Day Fills
standardized to 30-day supplies
1,929
Days of Medication
total across all patients in 2023

About Sulfamethoxazole-Trimethoprim: This medication is a combination of two antibiotics: sulfamethoxazole and trimethoprim. Show more ▾

It is used to treat a wide variety of bacterial infections (such as middle ear, urine, respiratory, and intestinal infections). It is also used to prevent and treat a certain type of pneumonia (pneumocystis-type). This medication should not be used by children less than 2 months of age due to the risk of serious side effects. This medication treats only certain types of infections. It will not work for viral infections (such as flu). Unnecessary use or misuse of any antibiotic can lead to its decreased effectiveness. A drug combination with broad-spectrum antibacterial activity against both gram-positive and gram-negative organisms. It is effective in the treatment of many infections, including PNEUMOCYSTIS PNEUMONIA in AIDS.

In 2023, this provider wrote 38 Medicare prescriptions for Sulfamethoxazole-Trimethoprim, about 1.5 times the volume of the typical California prescriber of this medication (25). Medicare paid an average of $8.97 per fill, versus $5.87 statewide.

How often this provider prescribes it

This provider
38
CA average
25.0

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

What Medicare paid per fill

This provider
$8.97
CA average
$5.87

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

41.9
30-Day Fills
standardized to 30-day supplies
1,210
Days of Medication
total across all patients in 2023

About Ibrance: Palbociclib is used to treat a certain type of breast cancer. Show more ▾

It works by slowing or stopping the growth of cancer cells.

In 2023, this provider wrote 25 Medicare prescriptions for Ibrance, about 89% of the volume of the typical California prescriber of this medication (28). Medicare paid an average of $14,733.87 per fill, versus $14,455.37 statewide.

How often this provider prescribes it

This provider
25
CA average
28.0

This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$14,733.87
CA average
$14,455.37

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

25
30-Day Fills
standardized to 30-day supplies
700
Days of Medication
total across all patients in 2023

About Anastrozole: Anastrozole is used to treat breast cancer in women after menopause. Show more ▾

Some breast cancers are made to grow faster by a natural hormone called estrogen. Anastrozole decreases the amount of estrogen the body makes and helps to slow or reverse the growth of these breast cancers. A nitrile and triazole derivative that acts as a selective nonsteroidal aromatase inhibitor. It is used in the treatment of ESTROGEN NUCLEAR RECEPTOR-positive breast cancer in postmenopausal women.

In 2023, this provider wrote 24 Medicare prescriptions for Anastrozole, about a third of the volume of the typical California prescriber of this medication (68). Medicare paid an average of $38.84 per fill, versus $27.13 statewide.

How often this provider prescribes it

This provider
24
CA average
68.0

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
$38.84
CA average
$27.13

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

66
30-Day Fills
standardized to 30-day supplies
1,980
Days of Medication
total across all patients in 2023

About Promacta: This medication is used to treat low platelet levels in people who have a certain blood disorder called chronic immune (idiopathic) thrombocytopenia purpura (ITP) or who have chronic hepatitis C. Show more ▾

It may also be used to treat people with a certain blood disorder (aplastic anemia). Platelets are a type of blood cell needed to form blood clots and prevent bleeding. Eltrombopag decreases your risk of bleeding by increasing the number of platelets. Eltrombopag acts like a certain natural substance (thrombopoietin) that causes the body to produce platelets.

In 2023, this provider wrote 22 Medicare prescriptions for Promacta, about 1.2 times the volume of the typical California prescriber of this medication (18). Medicare paid an average of $7,255.61 per fill, versus $12,055.64 statewide.

How often this provider prescribes it

This provider
22
CA average
18.0

This provider's prescribing volume for this medication is in line with the average CA prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$7,255.61
CA average
$12,055.64

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

31.7
30-Day Fills
standardized to 30-day supplies
944
Days of Medication
total across all patients in 2023

About Dexamethasone: Dexamethasone is used to treat conditions such as arthritis, blood/hormone disorders, allergic reactions, skin diseases, eye problems, breathing problems, bowel disorders, cancer, and immune system disorders. Show more ▾

It is also used as a test for an adrenal gland disorder (Cushing's syndrome). Dexamethasone 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. An anti-inflammatory 9-fluoro-glucocorticoid.

In 2023, this provider wrote 20 Medicare prescriptions for Dexamethasone, about 63% of the volume of the typical California prescriber of this medication (32). Medicare paid an average of $26.75 per fill, versus $19.76 statewide.

How often this provider prescribes it

This provider
20
CA average
32.0

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
$26.75
CA average
$19.76

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

29
30-Day Fills
standardized to 30-day supplies
718
Days of Medication
total across all patients in 2023

About Entecavir: See also Warning section. Show more ▾

Entecavir is used to treat long-term hepatitis B infection. Hepatitis B is an infection of the liver caused by the hepatitis B virus. Long-term infection can cause liver damage, rarely liver cancer, and liver failure. Entecavir helps to decrease the amount of hepatitis B virus in your body. It is unknown if this medication lowers your chance of getting liver cancer or liver damage. Entecavir is an antiviral that belongs to a class of drugs known as hepatitis B virus nucleoside reverse transcriptase inhibitors. Entecavir is not a cure for hepatitis B. It does not prevent the spread of the virus to others through sexual contact or blood/body fluid contamination (such as sharing used needles).

In 2023, this provider wrote 15 Medicare prescriptions for Entecavir, about half the volume of the typical California prescriber of this medication (29). Medicare paid an average of $759.43 per fill, versus $283.17 statewide.

How often this provider prescribes it

This provider
15
CA average
29.0

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
$759.43
CA average
$283.17

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

15
30-Day Fills
standardized to 30-day supplies
450
Days of Medication
total across all patients in 2023

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 15 Medicare prescriptions for Prednisone, about a third of the volume of the typical California prescriber of this medication (40). Medicare paid an average of $11.13 per fill, versus $8.18 statewide.

How often this provider prescribes it

This provider
15
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
$11.13
CA average
$8.18

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

16
30-Day Fills
standardized to 30-day supplies
313
Days of Medication
total across all patients in 2023

About Tamoxifen Citrate: Tamoxifen is used to treat breast cancer. Show more ▾

It is also used to reduce the chances of breast cancer in high-risk patients. This medication can block the growth of breast cancer. It works by interfering with the effects of estrogen in the breast tissue. One of the SELECTIVE ESTROGEN RECEPTOR MODULATORS with tissue-specific activities. Tamoxifen acts as an anti-estrogen (inhibiting agent) in the mammary tissue, but as an estrogen (stimulating agent) in cholesterol metabolism, bone density, and cell proliferation in the ENDOMETRIUM.

In 2023, this provider wrote 14 Medicare prescriptions for Tamoxifen Citrate, about a third of the volume of the typical California prescriber of this medication (34). Medicare paid an average of $26.99 per fill, versus $36.55 statewide.

How often this provider prescribes it

This provider
14
CA average
34.0

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
$26.99
CA average
$36.55

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

40
30-Day Fills
standardized to 30-day supplies
1,200
Days of Medication
total across all patients in 2023

About Warfarin Sodium: This medication is used to treat blood clots (such as in deep vein thrombosis-DVT or pulmonary embolus-PE) and/or to prevent new clots from forming in your body. Show more ▾

Preventing harmful blood clots helps to reduce the risk of a stroke or heart attack. Conditions that increase your risk of developing blood clots include a certain type of irregular heart rhythm (atrial fibrillation), heart valve replacement, recent heart attack, and certain surgeries (such as hip/knee replacement). Warfarin is commonly called a blood thinner, but the more correct term is anticoagulant. It helps to keep blood flowing smoothly in your body by decreasing the amount of certain substances (clotting proteins) in your blood. An anticoagulant that acts by inhibiting the synthesis of vitamin K-dependent coagulation factors. Warfarin is indicated for the prophylaxis and/or treatment of venous thrombosis and its extension, pulmonary embolism, and atrial fibrillation with embolization. It is also used as an adjunct in the prophylaxis of systemic embolism after myocardial infarction. Warfarin is also used as a rodenticide.

In 2023, this provider wrote 14 Medicare prescriptions for Warfarin Sodium, about a third of the volume of the typical California prescriber of this medication (42). Medicare paid an average of $31.97 per fill, versus $15.05 statewide.

How often this provider prescribes it

This provider
14
CA average
42.0

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
$31.97
CA average
$15.05

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

18
30-Day Fills
standardized to 30-day supplies
533
Days of Medication
total across all patients in 2023

About Lidocaine-Prilocaine: This medication contains 2 amide-type local anesthetics, lidocaine and prilocaine. Show more ▾

It is used on normal, unbroken skin or on the outer genital area to prevent pain before certain procedures such as inserting a needle, skin grafts, or skin laser surgery. It works by temporarily numbing the skin and surrounding area. Do not use this product in the ears. If this product alone cannot completely numb the area being treated, it may be used to numb the area before a lidocaine injection is given to provide enough pain relief for certain procedures (such as removal of genital warts). A topical local anesthetic preparation that is composed of a mixture of lidocaine and prilocaine. It is used to provide anesthesia during minor surgery and for the treatment of PREMATURE EJACULATION.

In 2023, this provider wrote 12 Medicare prescriptions for Lidocaine-Prilocaine, about half the volume of the typical California prescriber of this medication (23). Medicare paid an average of $13.51 per fill, versus $26.54 statewide.

How often this provider prescribes it

This provider
12
CA average
23.0

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
$13.51
CA average
$26.54

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

12
30-Day Fills
standardized to 30-day supplies
330
Days of Medication
total across all patients in 2023

About Tagrisso: This medication is used to treat lung cancer. Show more ▾

Osimertinib belongs to a class of drugs known as kinase inhibitors. It works by slowing or stopping the growth of cancer cells. It binds to a certain protein (epidermal growth factor receptor-EGFR) in some tumors.

In 2023, this provider wrote 12 Medicare prescriptions for Tagrisso, about a third of the volume of the typical California prescriber of this medication (32). Medicare paid an average of $15,349.10 per fill, versus $16,956.40 statewide.

How often this provider prescribes it

This provider
12
CA average
32.0

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
$15,349.10
CA average
$16,956.40

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

12
30-Day Fills
standardized to 30-day supplies
360
Days of Medication
total across all patients in 2023

About Potassium Chloride: This medication is a mineral supplement used to treat or prevent low amounts of potassium in the blood. Show more ▾

A normal level of potassium in the blood is important. Potassium helps your cells, kidneys, heart, muscles, and nerves work properly. Most people get enough potassium by eating a well-balanced diet. Some conditions that can lower your body's potassium level include severe prolonged diarrhea and vomiting, hormone problems such as hyperaldosteronism, or treatment with water pills/diuretics. A white crystal or crystalline powder used in BUFFERS; FERTILIZERS; and EXPLOSIVES. It can be used to replenish ELECTROLYTES and restore WATER-ELECTROLYTE BALANCE in treating HYPOKALEMIA.

In 2023, this provider wrote 11 Medicare prescriptions for Potassium Chloride, about a quarter of the volume of the typical California prescriber of this medication (48). Medicare paid an average of $7.87 per fill, versus $34.30 statewide.

How often this provider prescribes it

This provider
11
CA average
48.0

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
$7.87
CA average
$34.30

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

11
30-Day Fills
standardized to 30-day supplies
282
Days of Medication
total across all patients in 2023

About Brukinsa: This medication is used to treat certain cancers (mantle cell lymphoma, marginal zone lymphoma, Waldenstrom's macroglobulinemia). Show more ▾

Zanubrutinib belongs to a class of drugs known as kinase inhibitors. It works by slowing or stopping the growth of cancer cells.

In 2023, this provider wrote 11 Medicare prescriptions for Brukinsa, about half the volume of the typical California prescriber of this medication (24). Medicare paid an average of $13,717.89 per fill, versus $11,990.55 statewide.

How often this provider prescribes it

This provider
11
CA average
24.0

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
$13,717.89
CA average
$11,990.55

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

11
30-Day Fills
standardized to 30-day supplies
330
Days of Medication
total across all patients in 2023
No medications match the current filters.
= the 5 medications this provider prescribes most. 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 DR. KAREN CHEE 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 Hematology & Oncology prescribing approach at this San Mateo, 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.