ALEXANDRA GRONCZEWSKI
NPI 1477241958
Nurse Practitioner - Family in Princeton, NJ
About Alexandra Gronczewski NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDRA GRONCZEWSKI (NPI 1477241958) is an individual family provider in Princeton, New Jersey, licensed in New Jersey (26NJ01475100) and active in the NPI registry since April 2023. She is enrolled in Medicare PECOS, maintains a secondary practice location in Princeton, and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses
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
Alexandra Gronczewski 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 Reassignments
2Medicare enrollment records show Alexandra Gronczewski reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Princeton, NJ 08540
- Reassigned Medicare billing, New Jersey enrollment
- 14 clinicians in this Medicare group
Princeton, NJ 08540
- Reassigned Medicare billing, New Jersey enrollment
- Medicare enrollment name: Princeton Dermatology Associatespc
- 17 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 08540 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Alexandra Gronczewski's NPI number?
The NPI number for Alexandra Gronczewski is 1477241958. It was assigned to this individual provider in the NPPES registry on April 24, 2023.
Where is Alexandra Gronczewski located?
Alexandra Gronczewski practices at 20 Elm Rd, Princeton, NJ 08540. The listed phone number is (609) 610-3222.
What is Alexandra Gronczewski's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Alexandra Gronczewski enrolled in Medicare?
Yes. Alexandra Gronczewski 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 organizations bill Medicare for Alexandra Gronczewski's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Gronczewski reassigns Medicare benefits to 2 organizations: Princeton Dermatology Associates II LLC (Princeton, NJ) and Princeton Dermatology Associates PC (Princeton, NJ). Each 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 Alexandra Gronczewski'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 Alexandra Gronczewski was last updated on September 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.
# Alexandra Gronczewski · NPI 1477241958
Family physician in Princeton, New Jersey. Individual provider, active in the CMS NPPES registry since April 24, 2023.
## Identity
- **NPI:** 1477241958 (Entity type: Individual)
- **Enumerated:** April 24, 2023
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 26NJ01475100 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 20 ELM RD, Princeton, NJ 08540-2502
- **Phone:** (609) 610-3222
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Princeton Dermatology Associates II LLC (NPI 1629946918, Princeton, NJ); Princeton Dermatology Associates PC (NPI 1336104561, Princeton, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** September 15, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1477241958) · Data from the CMS NPPES public registry.