DR. ROBERT MICHAEL KLEIN M.D.
NPI 1235196452
Allergy & Immunology - Allergy in New York, NY
About Dr. Robert Michael Klein M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ROBERT MICHAEL KLEIN M.D. (NPI 1235196452) is an individual allergy provider in New York, New York, licensed in New York (131109) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Wayne, and is a graduate of New York Medical College (1976).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 2
Accepted Insurance
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. Robert Michael Klein M.d. 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
3Medicare enrollment records show Robert Klein reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10032
- Reassigned Medicare billing, New York enrollment
- 3,922 clinicians in this Medicare group
New Hyde Park, NY 11042
- Reassigned Medicare billing, New Jersey enrollment
- 417 clinicians in this Medicare group
Riverdale, NJ 07457
- Reassigned Medicare billing, New Jersey enrollment
- Medicare enrollment name: Jeffrey Weiss, M.D., P.A.
- 26 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.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
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 10032
NEW YORK, NY 10032
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 Robert Klein's NPI number?
The NPI number for Robert Klein is 1235196452. It was assigned to this individual provider in the NPPES registry on May 1, 2006.
Where is Robert Klein located?
Robert Klein practices at 3959 Broadway Ph Building, 17th Floor, East Wing, Room 114, New York, NY 10032. The listed phone number is (212) 305-2300.
What is Robert Klein's specialty?
The primary specialty registered for this NPI is Allergy & Immunology, specializing in Allergy, with taxonomy code 207KA0200X.
Is Robert Klein enrolled in Medicare?
Yes. Robert Klein 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 Robert Klein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Klein reassigns Medicare benefits to 3 organizations: Trustees Of Columbia University In The City Of New York (New York, NY), Optum Medical Care Of New Jersey PC (New Hyde Park, NY) and Jeffrey Weiss MD PA (Riverdale, 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 Robert Klein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Robert Klein accept?
Health plans from Oscar Health list Robert Klein as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Robert Klein was last updated on July 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Dr. Robert Michael Klein, M.D. · NPI 1235196452
Allergy physician in New York, New York. Individual provider, active in the CMS NPPES registry since May 1, 2006.
## Identity
- **NPI:** 1235196452 (Entity type: Individual)
- **Enumerated:** May 1, 2006
- **Primary specialty:** Allergy & Immunology - Allergy · taxonomy 207KA0200X
- **State license:** 131109 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 3959 BROADWAY, PH BUILDING, 17TH FLOOR, EAST WING, ROOM 114, New York, NY 10032-3720
- **Phone:** (212) 305-2300 · **Fax:** (212) 305-4538
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Trustees Of Columbia University In The City Of New York (NPI 1477068971, New York, NY); Optum Medical Care Of New Jersey PC (NPI 1578665048, New Hyde Park, NY); Jeffrey Weiss MD PA (NPI 1316016629, Riverdale, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 1976
## Record status
- **NPPES last updated:** July 30, 2021
- **Other identifiers:** Other 03509762332 (NJ); Medicaid 1826808 (NJ)
---
Source: [NPI Profile](https://npiprofile.com/npi/1235196452) · Data from the CMS NPPES public registry.