MRS. KAREN ANN ZARRELLI CRNP
NPI 1447556493
Nurse Practitioner in Reno, NV
About Mrs. Karen Ann Zarrelli Crnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. KAREN ANN ZARRELLI CRNP (NPI 1447556493) is an individual nurse practitioner in Reno, Nevada, licensed in Maryland (RO90425) and active in the NPI registry since February 2011. She is enrolled in Medicare PECOS, maintains a secondary practice location in San Francisco, and is a graduate of Other (1999).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mrs. Karen Ann Zarrelli Crnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Karen Zarrelli reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Rockville, MD 20852
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 14 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 8
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 89501 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
RENO, NV 89501
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Karen Zarrelli's NPI number?
The NPI number for Karen Zarrelli is 1447556493. It was assigned to this individual provider in the NPPES registry on February 8, 2011.
Where is Karen Zarrelli located?
Karen Zarrelli practices at 1 E Liberty St Ste 600, Reno, NV 89501. The listed phone number is (240) 393-1861.
What is Karen Zarrelli's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Karen Zarrelli enrolled in Medicare?
Yes. Karen Zarrelli is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Karen Zarrelli's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Zarrelli reassigns Medicare benefits to Maryland Medical Specialists Inc (Rockville, MD). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karen Zarrelli's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Karen Zarrelli was last updated on January 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mrs. Karen Ann Zarrelli, CRNP · NPI 1447556493
Nurse Practitioner physician in Reno, Nevada. Individual provider, active in the CMS NPPES registry since February 8, 2011.
## Identity
- **NPI:** 1447556493 (Entity type: Individual)
- **Enumerated:** February 8, 2011
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** RO90425 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 E LIBERTY ST STE 600, Reno, NV 89501-2110
- **Phone:** (240) 393-1861
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Maryland Medical Specialists Inc (NPI 1245907252, Rockville, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1999
## Record status
- **NPPES last updated:** January 21, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1447556493) · Data from the CMS NPPES public registry.