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

Mrs. Karen Ann Zarrelli, CRNP

Individual provider Nurse Practitioner · NPI 1447556493

Mrs. Karen Ann Zarrelli, CRNP is a Nurse Practitioner in Reno, Nevada. Qualified in 1999, 27 years ago. Practices with Maryland Medical Specialists Inc, a 10-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Maryland.

Years since qualifying
27
Licensed in
MD
In the registry since
2011
Specialties on file
3
What do these letters mean?
CRNP — Certified Registered Nurse Practitioner
The title Pennsylvania and some other states use for a nurse practitioner.

See every abbreviation used in this directory →

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Practice location Address checks out

1 E Liberty St Ste 600
Reno, NV 89501-2110
Phone: (240) 393-1861
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 555 Mission St, San Francisco, CA 94105-0920 — (240) 393-1861

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence RO90425 (MD)
Adult Health Nurse Practitioner Taxonomy 363LA2200X · Licence RO90425 (MD)
Gerontology Nurse Practitioner Taxonomy 363LG0600X · Licence RO90425 (MD)

Record details

NPI number1447556493
Entity typeIndividual (Type 1)
GenderFemale
Credentials CRNP
Sole proprietorNo
NPI enumeratedFebruary 8, 2011
Last updated in NPPESJanuary 21, 2022
Certification dateJanuary 21, 2022

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Group practice Maryland Medical Specialists Inc — 10 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 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 patients89
Services billed 3,589 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

Colleagues at Maryland Medical Specialists Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 10 clinicians in the practice; 7 are shown here.

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