ZACHARY PHILIP JOHANNESSON MD
NPI 1184203663
Emergency Medicine in Potsdam, NY
About Zachary Philip Johannesson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ZACHARY PHILIP JOHANNESSON MD (NPI 1184203663) is an individual emergency medicine provider in Potsdam, New York, licensed in New York (328336) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS, is affiliated with Canton-potsdam Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 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
Zachary Philip Johannesson 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 Zachary Johannesson reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Potsdam, NY 13676
- Reassigned Medicare billing, New York enrollment
- 414 clinicians in this Medicare group
Massena, NY 13662
- Reassigned Medicare billing, New York enrollment
- 27 clinicians in this Medicare group
Gouverneur, NY 13642
- Reassigned Medicare billing, New York enrollment
- Also billed through NPI 1629409925 (New York)
- 143 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 3
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.
Canton-Potsdam Hospital
Acute Care Hospitals · Potsdam, NYGouverneur Hospital
Critical Access Hospitals · Gouverneur, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 13676 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.
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 Zachary Johannesson's NPI number?
The NPI number for Zachary Johannesson is 1184203663. It was assigned to this individual provider in the NPPES registry on April 3, 2021.
Where is Zachary Johannesson located?
Zachary Johannesson practices at 50 Leroy St, Potsdam, NY 13676. The listed phone number is (315) 265-3300.
What is Zachary Johannesson's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Zachary Johannesson enrolled in Medicare?
Yes. Zachary Johannesson 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 Zachary Johannesson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zachary Johannesson reassigns Medicare benefits to 3 organizations: Canton-Potsdam Hospital (Potsdam, NY), Massena Hospital Inc (Massena, NY) and Gouverneur Hospital (Gouverneur, 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 Zachary Johannesson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Zachary Johannesson affiliated with any hospitals?
According to CMS data, Zachary Johannesson is affiliated with Canton-Potsdam Hospital and Gouverneur Hospital.
When was this NPI record last updated?
The NPPES record for Zachary Johannesson was last updated on August 28, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Zachary Philip Johannesson, MD · NPI 1184203663
Emergency Medicine physician in Potsdam, New York. Individual provider, active in the CMS NPPES registry since April 3, 2021.
## Identity
- **NPI:** 1184203663 (Entity type: Individual)
- **Enumerated:** April 3, 2021
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 328336 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 50 LEROY ST, Potsdam, NY 13676-1786
- **Phone:** (315) 265-3300
## 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): Canton-Potsdam Hospital (NPI 1568548782, Potsdam, NY); Massena Hospital Inc (NPI 1972604460, Massena, NY); Gouverneur Hospital (NPI 1295156412, Gouverneur, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Ohio State University College Of Medicine, class of 2024
## Record status
- **NPPES last updated:** August 28, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1184203663) · Data from the CMS NPPES public registry.