ANDREW L HIMELSTEIN MD
NPI 1841269966
Internal Medicine - Hematology & Oncology in Newark, DE
About Andrew L Himelstein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANDREW L HIMELSTEIN MD (NPI 1841269966) is an individual hematology & oncology provider in Newark, Delaware, licensed in Delaware (CI0003651) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Andrew L Himelstein Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Andrew Himelstein reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Newark, DE 19713
- Reassigned Medicare billing, Delaware enrollment
- 32 clinicians in this Medicare group
Newark, DE 19702
- Reassigned Medicare billing, Delaware enrollment
- 29 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 22
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19713 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.
Reported Quality Measures
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.
NEWARK, DE 19713
NEWARK, DE 19713
NEWARK, DE 19713
NEWARK, DE 19713
NEWARK, DE 19713
NEWARK, DE 19713
NEWARK, DE 19713
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 Andrew Himelstein's NPI number?
The NPI number for Andrew Himelstein is 1841269966. It was assigned to this individual provider in the NPPES registry on March 14, 2006.
Where is Andrew Himelstein located?
Andrew Himelstein practices at 4701 Ogletown Stanton Rd Suite 3400, Newark, DE 19713. The listed phone number is (302) 366-1200.
What is Andrew Himelstein's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Andrew Himelstein enrolled in Medicare?
Yes. Andrew Himelstein is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Andrew Himelstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Himelstein reassigns Medicare benefits to 2 organizations: Medical Oncology Hematology Consultants PA (Newark, DE) and Delaware Hospice, Inc (Newark, DE). 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 Andrew Himelstein'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 Andrew Himelstein was last updated on February 28, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Andrew L Himelstein, MD · NPI 1841269966
Hematology & Oncology physician in Newark, Delaware. Individual provider, active in the CMS NPPES registry since March 14, 2006.
## Identity
- **NPI:** 1841269966 (Entity type: Individual)
- **Enumerated:** March 14, 2006
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** CI0003651 (Delaware)
- **Sole proprietor:** No
## Practice location
- **Address:** 4701 OGLETOWN STANTON RD, SUITE 3400, Newark, DE 19713
- **Phone:** (302) 366-1200 · **Fax:** (302) 366-1700
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Medical Oncology Hematology Consultants PA (NPI 1235199316, Newark, DE); Delaware Hospice, Inc (NPI 1821361072, Newark, DE) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 28, 2020
- **Other identifiers:** Medicaid 0000323201 (DE)
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Source: [NPI Profile](https://npiprofile.com/npi/1841269966) · Data from the CMS NPPES public registry.