Zachary Philip Johannesson, MD
Emergency Medicine Physician · Potsdam, NY
Zachary Philip Johannesson, MD is an emergency medicine physician with a practice address in Potsdam, New York, and NPI 1184203663, issued on Apr 3, 2021. Check the license (New York 328336, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Zachary Philip Johannesson
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 328336 NY
Self-reported in NPPES; status is on the state search - Practice location
- 50 Leroy St, Potsdam, NY 13676
- Phone
- (315) 265-3300
- Enumerated
- Apr 3, 2021
- Record last updated
- Aug 28, 2024
- Medicare enrollment
- Enrolled (PECOS I20240819003456); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 2024
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 5,025 in New York → Look up another NPI →
Also registered at 50 Leroy St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joseph Adams, FNP-CFamily Nurse Practitioner1164984753
- Caroline Arcand DusseaultOccupational Therapist1144015397
- Mariam Asar, MDChild & Adolescent Psychiatry Physician1649479239
- Timothy Atkinson, M.D.Family Medicine Physician1346239308
- Katherine Baker, RPA-CPhysician Assistant1316971831
- Cynthia Baltazar, M.D.Internal Medicine Physician1790782548
Verify Zachary Philip Johannesson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 328336Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average emergency medicine physician in 2024
104 Medicare Part D claims for 80 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
One hospital affiliation
- Canton-Potsdam HospitalPotsdam, NY · Acute Care Hospitals2 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Zachary Philip Johannesson among 5,025 emergency medicine physician records in New York
Zachary Philip Johannesson, MD is one of 5,025 emergency medicine physician records with a practice address in New York. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 88% of them.
- NPI issued2021 · 88% of these records are older, 7% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2024 · median 2013 among the 3,232 with a school on file
- Record last updated2024 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 emergency medicine physician records list a practice address in Potsdam
They are 16 of the 445 NPPES records with a practice address in Potsdam, and 5,025 emergency medicine physician records in New York.
All 5,025 in New York → Every provider in Potsdam → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Ryan Coates, DOPotsdam, NY 136761275749087
- Lucas Da Matta, MDPotsdam, NY 136761952922767
- Rebecca Gilson, M.D.Potsdam, NY 136761477874014
- Brenda Healey, M.D.Potsdam, NY 136761780612457
- Rosemarie Heisse, D.O.Potsdam, NY 136761124124946
- Justin Mackinnon, MDPotsdam, NY 136761447516224
- Matthew Morgan, D.O.Potsdam, NY 136761326363037
- Michael Mullen, MDPotsdam, NY 136761730190265
Common questions
What is Zachary Philip Johannesson, MD's NPI number?
Zachary Philip Johannesson, MD's National Provider Identifier (NPI) is 1184203663, issued on Apr 3, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Philip Johannesson, MD located?
The NPPES record lists a practice address at 50 Leroy St, Potsdam, NY, 13676. Phone: (315) 265-3300. Providers update this record themselves, so call before visiting.
How can I verify Zachary Philip Johannesson, MD's license?
NPPES lists New York license number 328336, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zachary Philip Johannesson, MD prescribe under Medicare Part D?
In 2024, Zachary Philip Johannesson, MD had 104 Medicare Part D claims for 80 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.