HOWARD B BLUMSTEIN M.D.
NPI 1598751471
Internal Medicine - Rheumatology in Smithtown, NY
About Howard B Blumstein M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HOWARD B BLUMSTEIN M.D. (NPI 1598751471) is an individual rheumatology provider in Smithtown, New York, licensed in New York (227807) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with John T Mather Memorial Hospital Of Port Jefferson, and is a graduate of State University Of New York At Buffalo School Of Medicine (2000).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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
Howard B Blumstein 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 Reassignment
Medicare enrollment records show Howard Blumstein reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Smithtown, NY 11787
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Rheumatology Associates Of Li LLP
- 13 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 29
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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
John T Mather Memorial Hospital Of Port Jefferson
Acute Care Hospitals · Port Jefferson, NYSt Charles Hospital
Acute Care Hospitals · Port Jefferson, NYSuny/Stony Brook University Hospital
Acute Care Hospitals · Stony Brook, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11787 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SMITHTOWN, NY 11787
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 Howard Blumstein's NPI number?
The NPI number for Howard Blumstein is 1598751471. It was assigned to this individual provider in the NPPES registry on September 26, 2005.
Where is Howard Blumstein located?
Howard Blumstein practices at 315 Middle Country Rd, Smithtown, NY 11787. The listed phone number is (631) 360-7778.
What is Howard Blumstein's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Howard Blumstein enrolled in Medicare?
Yes. Howard Blumstein 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 Howard Blumstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Howard Blumstein reassigns Medicare benefits to Rheumatology Associates Of L.I., LLP (Smithtown, 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 Howard Blumstein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Howard Blumstein affiliated with any hospitals?
According to CMS data, Howard Blumstein is affiliated with John T Mather Memorial Hospital Of Port Jefferson, St Charles Hospital and Suny/Stony Brook University Hospital.
When was this NPI record last updated?
The NPPES record for Howard Blumstein was last updated on May 19, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.