Karen Zarrelli, CRNP
NPI 1447556493 · Nurse Practitioner · Reno, NV
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Zarrelli, CRNP is a Nurse Practitioner provider in Reno, NV (NPI 1447556493).
Provider details
- NPI number
- 1447556493
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CRNP
- Sex
- Female
- Sole proprietor
- No
- License
- RO90425 (MD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
3,575 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 746 | $169 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 | 664 | $46 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 642 | $58 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days99454 | 607 | $47 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, Each Additional 20 Minutes99458 | 386 | $37 |
| Telephone Medical Discussion With Physician, 21-30 Minutes |
Practice location
Mailing address
Additional practice locations (1)
- 555 Mission StSan Francisco, CA 94105-0920Phone: (240) 393-1861
Registry dates
- Enumerated
- 2011-02-08
- Last updated
- 2022-01-21
- Certified
- 2022-01-21
Frequently asked questions
- What is Karen Zarrelli's NPI number?
- Karen Zarrelli's National Provider Identifier (NPI) is 1447556493, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Zarrelli's specialty?
- Karen Zarrelli is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Zarrelli located?
- Karen Zarrelli's practice location on file with NPPES is 1 E Liberty St Ste 600, Reno, NV 89501-2110.
- What is Karen Zarrelli's phone number?
- The practice phone number listed in the NPPES registry for Karen Zarrelli is (240) 393-1861.
- Does Karen Zarrelli accept Medicare?
- Karen Zarrelli is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Zarrelli's NPI active?
- Yes — Karen Zarrelli's NPI (1447556493) is active in the NPPES registry as of the last update on 2022-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.