Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Karen Hsu Patterson, MSN, RN, FNP-C

Individual provider Family Nurse Practitioner · NPI 1851704977

Karen Hsu Patterson, MSN, RN, FNP-C is a Nurse Practitioner in Santa Monica, California. Qualified in 2012, 14 years ago. Practices with Providence Saint Johns Medical Foundation, a 285-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
14
Licensed in
CA
In the registry since
2014
Specialties on file
2
What do these letters mean?
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
FNP-C — Family Nurse Practitioner, Certified
A family nurse practitioner certified by the AANP.

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Practice location Address checks out

2021 Santa Monica Blvd Ste 245E
Santa Monica, CA 90404-2132
Phone: (310) 829-8975
Fax: (424) 291-4108
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1821 Wilshire Blvd Ste 100, Santa Monica, CA 90403-5627 — (310) 575-3100

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 22912 (CA)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 22912 (CA)

Record details

NPI number1851704977
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSN , RN , FNP-C
Sole proprietorNo
NPI enumeratedJune 5, 2014
Last updated in NPPESFebruary 13, 2024
Certification dateFebruary 13, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice Providence Saint Johns Medical Foundation — 285 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients144
Services billed 584 a service is one billed item, such as a visit, a test or a procedure
Average patient age83

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $16 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Providence Saint Johns Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 285 clinicians in the practice; 12 are shown here.

Other providers in Santa Monica