MARIE LOUIES LAMSEN M.D.
NPI 1982975710
Internal Medicine in Danbury, CT
About Marie Louies Lamsen M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIE LOUIES LAMSEN M.D. (NPI 1982975710) is an individual internal medicine provider in Danbury, Connecticut, licensed in Connecticut (70095) and active in the NPI registry since January 2012. She is enrolled in Medicare PECOS, is affiliated with Northern Westchester Hospital, and maintains a secondary practice location in New Rochelle.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
Marie Louies Lamsen 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
4Medicare enrollment records show Marie Louies Lamsen reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Danbury, CT 06810
- Reassigned Medicare billing, Connecticut enrollment
- 818 clinicians in this Medicare group
White Plains, NY 10601
- Reassigned Medicare billing, New York enrollment
- 479 clinicians in this Medicare group
Yonkers, NY 10701
- Reassigned Medicare billing, New York enrollment
- 211 clinicians in this Medicare group
Great Neck, NY 11021
- Reassigned Medicare billing, New York enrollment
- 9,353 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 7
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northern Westchester Hospital
Acute Care Hospitals · Mount Kisco, NYWhite Plains Hospital Center
Acute Care Hospitals · White Plains, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06810 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.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
DANBURY, CT 06810
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 Marie Louies Lamsen's NPI number?
The NPI number for Marie Louies Lamsen is 1982975710. It was assigned to this individual provider in the NPPES registry on January 25, 2012.
Where is Marie Louies Lamsen located?
Marie Louies Lamsen practices at 24 Hospital Ave, Danbury, CT 06810. The listed phone number is (203) 739-6959.
What is Marie Louies Lamsen's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Marie Louies Lamsen enrolled in Medicare?
Yes. Marie Louies Lamsen 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 Marie Louies Lamsen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marie Louies Lamsen reassigns Medicare benefits to 4 organizations: Nuvance Health Medical Practice Ct, Inc. (Danbury, CT), East Post Road Medical Services PC (White Plains, NY), Montefiore New Rochelle Hospital (Yonkers, NY) and North Shore-Lij Medical PC (Great Neck, NY). 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 Marie Louies Lamsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Marie Louies Lamsen affiliated with any hospitals?
According to CMS data, Marie Louies Lamsen is affiliated with Northern Westchester Hospital and White Plains Hospital Center.
When was this NPI record last updated?
The NPPES record for Marie Louies Lamsen was last updated on January 31, 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.
# Marie Louies Lamsen, M.D. · NPI 1982975710
Internal Medicine physician in Danbury, Connecticut. Individual provider, active in the CMS NPPES registry since January 25, 2012.
## Identity
- **NPI:** 1982975710 (Entity type: Individual)
- **Enumerated:** January 25, 2012
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 70095 (Connecticut)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 24 HOSPITAL AVE, Danbury, CT 06810-6077
- **Phone:** (203) 739-6959
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Nuvance Health Medical Practice Ct, Inc. (NPI 1407898117, Danbury, CT); East Post Road Medical Services PC (NPI 1841767274, White Plains, NY); Montefiore New Rochelle Hospital (NPI 1295163244, Yonkers, NY); North Shore-Lij Medical PC (NPI 1053688572, Great Neck, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Saint Louis University School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** January 31, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1982975710) · Data from the CMS NPPES public registry.