DR. ERIK MATTHEW JOHNSEN MD
NPI 1104320977
Internal Medicine - Cardiovascular Disease in Valhalla, NY
About Dr. Erik Matthew Johnsen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ERIK MATTHEW JOHNSEN MD (NPI 1104320977) is an individual cardiovascular disease provider in Valhalla, New York, licensed in New York (33711201) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, is affiliated with Good Samaritan Hospital Of Suffern, and maintains a secondary practice location in New Orleans.
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
Dr. Erik Matthew Johnsen 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
2Medicare enrollment records show Erik Johnsen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Valhalla, NY 10595
- Reassigned Medicare billing, New York enrollment
- 1,663 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.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Good Samaritan Hospital Of Suffern
Acute Care Hospitals · Suffern, NYHealthalliance Hospital Marys Avenue Campus
Acute Care Hospitals · Kingston, NYWestchester Medical Center
Acute Care Hospitals · Valhalla, NYPutnam Hospital Center
Acute Care Hospitals · Carmel, NYWhite Plains Hospital Center
Acute Care Hospitals · White Plains, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10595 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.
VALHALLA, NY 10595
VALHALLA, NY 10595
VALHALLA, NY 10595
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 Erik Johnsen's NPI number?
The NPI number for Erik Johnsen is 1104320977. It was assigned to this individual provider in the NPPES registry on March 19, 2018.
Where is Erik Johnsen located?
Erik Johnsen practices at 100 Woods Rd, Valhalla, NY 10595. The listed phone number is (914) 493-4900.
What is Erik Johnsen's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Erik Johnsen enrolled in Medicare?
Yes. Erik Johnsen 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 Erik Johnsen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Erik Johnsen reassigns Medicare benefits to 2 organizations: Westchester Medical Center Advanced Physician Services PC (Valhalla, 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 Erik Johnsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Erik Johnsen affiliated with any hospitals?
According to CMS data, Erik Johnsen is affiliated with Good Samaritan Hospital Of Suffern, Healthalliance Hospital Marys Avenue Campus, Westchester Medical Center, Putnam Hospital Center and White Plains Hospital Center.
When was this NPI record last updated?
The NPPES record for Erik Johnsen was last updated on September 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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. Erik Matthew Johnsen, MD · NPI 1104320977
Cardiovascular Disease physician in Valhalla, New York. Individual provider, active in the CMS NPPES registry since March 19, 2018.
## Identity
- **NPI:** 1104320977 (Entity type: Individual)
- **Enumerated:** March 19, 2018
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** 33711201 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 WOODS RD, Valhalla, NY 10595-1530
- **Phone:** (914) 493-4900
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Westchester Medical Center Advanced Physician Services PC (NPI 1740687458, Valhalla, NY); North Shore-Lij Medical PC (NPI 1053688572, Great Neck, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rutgers New Jersey Medical School, class of 2018
## Record status
- **NPPES last updated:** September 2, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1104320977) · Data from the CMS NPPES public registry.