JENS RUETER MD
NPI 1891995189
Internal Medicine - Hematology & Oncology in Brewer, ME
About Jens Rueter Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JENS RUETER MD (NPI 1891995189) is an individual hematology & oncology provider in Brewer, Maine, licensed in Maine (R021397) and active in the NPI registry since July 2007. He is enrolled in Medicare PECOS, is affiliated with Northern Light Eastern Maine Medical Center, and is a graduate of Other (2000).
NPPES Registry Identity
Specialties & Licenses
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
Jens Rueter Md 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 Jens Rueter reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bangor, ME 04401
- Reassigned Medicare billing, Maine enrollment
- 788 clinicians in this Medicare group
Bar Harbor, ME 04609
- Reassigned Medicare billing, Maine enrollment
- 87 clinicians in this Medicare group
Millinocket, ME 04462
- Reassigned Medicare billing, Maine enrollment
- 19 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northern Light Eastern Maine Medical Center
Acute Care Hospitals · Bangor, MEMillinocket Regional Hospital
Critical Access Hospitals · Millinocket, MEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04412 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BREWER, ME 04412
BREWER, ME 04412
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 Jens Rueter's NPI number?
The NPI number for Jens Rueter is 1891995189. It was assigned to this individual provider in the NPPES registry on July 24, 2007.
Where is Jens Rueter located?
Jens Rueter practices at 33 Whiting Hill Rd Suite 21, Brewer, ME 04412. The listed phone number is (207) 973-7478.
What is Jens Rueter's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Jens Rueter enrolled in Medicare?
Yes. Jens Rueter 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 Jens Rueter's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jens Rueter reassigns Medicare benefits to 3 organizations: Eastern Maine Medical Center (Bangor, ME), Mount Desert Island Hospital (Bar Harbor, ME) and Millinocket Regional Hospital (Millinocket, ME). 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 Jens Rueter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Jens Rueter accept?
Health plans from Anthem Blue Cross and Blue Shield list Jens Rueter 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.
Is Jens Rueter affiliated with any hospitals?
According to CMS data, Jens Rueter is affiliated with Northern Light Eastern Maine Medical Center and Millinocket Regional Hospital.
When was this NPI record last updated?
The NPPES record for Jens Rueter was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Jens Rueter, MD · NPI 1891995189
Hematology & Oncology physician in Brewer, Maine. Individual provider, active in the CMS NPPES registry since July 24, 2007.
## Identity
- **NPI:** 1891995189 (Entity type: Individual)
- **Enumerated:** July 24, 2007
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** R021397 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 33 WHITING HILL RD, SUITE 21, Brewer, ME 04412-1021
- **Phone:** (207) 973-7478 · **Fax:** (207) 973-7807
## 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): Eastern Maine Medical Center (NPI 1790789147, Bangor, ME); Mount Desert Island Hospital (NPI 1790764512, Bar Harbor, ME); Millinocket Regional Hospital (NPI 1275646150, Millinocket, ME) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2000
## Record status
- **NPPES last updated:** July 21, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1891995189) · Data from the CMS NPPES public registry.