Kate Diep Dirksen , PA-C
Physician Assistant • Fremont, CA
39141 Civic Center Dr, Suite 335
Fremont, CA 945385818
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on June 16, 2011; this date does not establish years in practice.
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Published CMS data list 154 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Ibuprofen — 37 prescription fills, including refills.
- Cephalexin — 24 prescription fills, including refills.
- Oxycodone Hcl — 21 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 8 records in the table · Guide: How to read Medicare Part D prescriber data
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Close to the middle for Part D prescriptions among clinicians listed under Physician Assistant in Fremont, CA (2024, 42 clinicians with data). Median for this group: 141. Middle half: 41 to 446.
Close to the middle for Part D prescriptions among clinicians listed under Physician Assistant in California (2024, 7,546 clinicians with data). Median for this group: 228. Middle half: 72 to 717.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 101 in 2020 to 154 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
39141 Civic Center Dr
Suite 335
Fremont, CA 945385818
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Permanente Medical Group Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
2010
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
157 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$1,673 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021–2025.
Years since graduation
16 years (graduated 2010)
CMS Doctors and Clinicians data list 2010 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
NPI first issued
2011
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Kate Dirksen has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Kate Dirksen as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Fremont and California
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Physician Assistant in Fremont, CA (2024, 42 clinicians with data). Median for this group: 141. Middle half: 41 to 446.
Close to the middle for clinicians listed under Physician Assistant in California (2024, 7,546 clinicians with data). Median for this group: 228. Middle half: 72 to 717.
Part D drug cost
A lower Part D drug cost than 60% of clinicians listed under Physician Assistant in Fremont, CA (2024, 42 clinicians with data). Median for this group: $2,392. Middle half: $902 to $13,009.
A lower Part D drug cost than 60% of clinicians listed under Physician Assistant in California (2024, 7,546 clinicians with data). Median for this group: $3,944. Middle half: $710 to $60,219.
73 active clinicians are listed under Physician Assistant with a practice address in Fremont, CA (14,777 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Fremont
21.9% of these 73 clinicians have the CMS telehealth indicator.
65.8% of these 73 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 52% from 101 in 2020 to 154 in 2024.
- 2020: 101
- 2021: 167
- 2022: 271
- 2023: 122
- 2024: 154
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30-day fills
30-day fills varied from year to year: 146 in 2020 and 157 in 2024.
- 2020: 146
- 2021: 267
- 2022: 533
- 2023: 225
- 2024: 157
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Part D drug cost
Part D drug cost went from $976 in 2020 to $1,673 in 2024.
- 2020: $976
- 2021: $1,813
- 2022: $2,853
- 2023: $1,357
- 2024: $1,673
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Ibuprofen | Ibuprofen | 37 | 1,203 | $508.88 | 29 |
| Cephalexin | Cephalexin | 24 | 240 | $324.22 | 24 |
| Oxycodone Hcl | Oxycodone Hcl | 21 | 75 | $155.68 | 20 |
| Ondansetron Hcl | Ondansetron Hcl | 19 | 67 | $110.52 | 19 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 15 | 55 | $131.96 | 15 |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 14 | 42 | $141.15 | 13 |
| Cefadroxil | Cefadroxil | 13 | 124 | $177.38 | 12 |
| Clindamycin Hcl | Clindamycin Hcl | 11 | 91 | $123.15 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20110902000061
CA
9234309055
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
Permanente Medical Group Inc
7373 W Lane, Stockton, CA 952103377
Phone: 2094762000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Surgery
Doctor of Medicine (M.D.)
Surgery - Vascular Surgery
Doctor of Medicine (M.D.)
Plastic Surgery
Physician Assistant - Surgical
Physician Assistant (Certified)
Physical Therapist
Surgery - Vascular Surgery
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Recorded as KATE DIRKSEN, PA-C
NPI status registered as active in NPPES database
Registered at 39141 CIVIC CENTER DR, SUITE 335, FREMONT, CA 945385818 (Tel: 5102481400)
Registered at 39141 CIVIC CENTER DR, SUITE 335, FREMONT, CA 945385818 (Tel: 5102481400)
Recorded as KATE WONG, PA-C
Physician Assistant (license number reported to NPPES: CA 21594)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Fremont
- Kristi Larock, PA
- Keith Jeffrey, PA-C
- Tuyet Nguyen, PA-C
- Zeba Mundu
- Victoria Tung, RD, CNSC, PA-C
- Erin Yu
Mailing Address
39141 Civic Center Dr, Suite 335
Fremont, CA 945385818
Phone: 5102481400