KATHERINE ALEXANDER FNP
NPI 1821356494
Nurse Practitioner - Family in New York, NY
About Katherine Alexander Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHERINE ALEXANDER FNP (NPI 1821356494) is an individual family provider in New York, New York, licensed in New York (336181) and active in the NPI registry since May 2012. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 15
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Katherine Alexander Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Katherine Alexander reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10019
- Reassigned Medicare billing, New York enrollment
- 99 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 10004 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEW YORK, NY 10004
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 Katherine Alexander's NPI number?
The NPI number for Katherine Alexander is 1821356494. It was assigned to this individual provider in the NPPES registry on May 2, 2012.
Where is Katherine Alexander located?
Katherine Alexander practices at 30 Broad St 45th Floor, New York, NY 10004. The listed phone number is (212) 530-0630.
What is Katherine Alexander's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Katherine Alexander enrolled in Medicare?
Yes. Katherine Alexander is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Katherine Alexander's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Alexander reassigns Medicare benefits to Mount Sinai School Of Medicine (New York, NY). 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 Katherine Alexander'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 Katherine Alexander was last updated on January 31, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Katherine Alexander, FNP · NPI 1821356494
Family physician in New York, New York. Individual provider, active in the CMS NPPES registry since May 2, 2012.
## Identity
- **NPI:** 1821356494 (Entity type: Individual)
- **Enumerated:** May 2, 2012
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 336181 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 30 BROAD ST, 45TH FLOOR, New York, NY 10004-2304
- **Phone:** (212) 530-0630 · **Fax:** (212) 867-4353
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mount Sinai School Of Medicine (NPI 1528538774, New York, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 31, 2017
- **Other identifiers:** Medicare OSCAR/certification 331945 (NY); Medicare OSCAR/certification 331952 (NY); Medicare OSCAR/certification 331978 (NY); and 12 more
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Source: [NPI Profile](https://npiprofile.com/npi/1821356494) · Data from the CMS NPPES public registry.