MICHAEL NAARENDORP
NPI 1548530702
Specialist in New York, NY
About Michael Naarendorp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL NAARENDORP (NPI 1548530702) is a healthcare organization registered as a specialist in New York, New York and active in the NPI registry since January 2012. The organization lists Michael Naaendorp, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 3
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Michael Naarendorp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Michael Naarendorp, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Harlem Rheumatology LLC's NPI number?
The NPI number for Harlem Rheumatology LLC is 1548530702. It was assigned to this organization in the NPPES registry on January 5, 2012. The provider is also known as Michael Naarendorp.
Where is Harlem Rheumatology LLC located?
Harlem Rheumatology LLC is located at 301 W 118th St Apt Ph-3f, New York, NY 10026. The listed phone number is (212) 360-5752.
What is Harlem Rheumatology LLC's specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Harlem Rheumatology LLC enrolled in Medicare?
Yes. Harlem Rheumatology LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Harlem Rheumatology LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Rheumatology) reassigns their Medicare billing to Harlem Rheumatology LLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Harlem Rheumatology LLC was last updated on March 16, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Michael Naarendorp · NPI 1548530702
Specialist organization in New York, New York. Organization record, active in the CMS NPPES registry since January 5, 2012.
## Identity
- **NPI:** 1548530702 (Entity type: Organization)
- **Enumerated:** January 5, 2012
- **Primary specialty:** Specialist · taxonomy 174400000X
- **Legal business name:** Harlem Rheumatology Llc
- **Organization subpart:** No
- **Authorized official:** Michael Naaendorp, OWNER
## Practice location
- **Address:** 301 W 118TH ST, APT PH-3F, New York, NY 10026-1049
- **Phone:** (212) 360-5752
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Rheumatology) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 16, 2012
- **Other identifiers:** Medicaid 01921948 (NY); Medicare PIN 80V631 (NY); Medicare UPIN G70929 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1548530702) · Data from the CMS NPPES public registry.