DR. RICHARD ADRIAN GREENDYK
NPI 1144612888
Internal Medicine - Critical Care Medicine in New York, NY
About Dr. Richard Adrian Greendyk NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. RICHARD ADRIAN GREENDYK (NPI 1144612888) is an individual critical care medicine provider in New York, New York, licensed in New York (296362) and active in the NPI registry since March 2015. He is enrolled in Medicare PECOS, is affiliated with New York-presbyterian Hospital, and is a graduate of Northwestern University Feinberg Medical School (2017).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Richard Adrian Greendyk 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 Richard Greendyk reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10032
- Reassigned Medicare billing, New York enrollment
- 3,922 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
New York-Presbyterian Hospital
Acute Care Hospitals · New York, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10032 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Richard Greendyk's NPI number?
The NPI number for Richard Greendyk is 1144612888. It was assigned to this individual provider in the NPPES registry on March 3, 2015.
Where is Richard Greendyk located?
Richard Greendyk practices at 622 W 168th St Ph 8-101, New York, NY 10032. The listed phone number is (212) 305-4141.
What is Richard Greendyk's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Richard Greendyk enrolled in Medicare?
Yes. Richard Greendyk 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 Richard Greendyk's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Richard Greendyk reassigns Medicare benefits to Trustees Of Columbia University In The City Of New York (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 Richard Greendyk's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Richard Greendyk affiliated with any hospitals?
According to CMS data, Richard Greendyk is affiliated with New York-Presbyterian Hospital.
When was this NPI record last updated?
The NPPES record for Richard Greendyk was last updated on March 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Dr. Richard Adrian Greendyk · NPI 1144612888
Critical Care Medicine physician in New York, New York. Individual provider, active in the CMS NPPES registry since March 3, 2015.
## Identity
- **NPI:** 1144612888 (Entity type: Individual)
- **Enumerated:** March 3, 2015
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** 296362 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 622 W 168TH ST PH 8-101, New York, NY 10032-3720
- **Phone:** (212) 305-4141
## 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:** Trustees Of Columbia University In The City Of New York (NPI 1477068971, New York, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Northwestern University Feinberg Medical School, class of 2017
## Record status
- **NPPES last updated:** March 6, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1144612888) · Data from the CMS NPPES public registry.