John E. Mertz, MD PHD
Emergency Medicine Physician · St Cloud, MN
John E. Mertz, MD PHD is an emergency medicine physician with a practice address in St Cloud, Minnesota, and NPI 1346217874, issued on Mar 3, 2006. Check the license (Minnesota 43425, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- John E. Mertz
- Credential
- MD PHD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 43425 MN
Self-reported in NPPES; status is on the state search - Practice location
- 1406 6 Ave N, St Cloud, MN 56301
- Phone
- (320) 255-5657
- Enumerated
- Mar 3, 2006
- Record last updated
- Nov 5, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (320) 656-7194
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,348 in Minnesota → Look up another NPI →
Verify John E. Mertz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 43425Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average emergency medicine physician in 2024
100 Medicare Part D claims for 69 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Doxycycline Hyclate15 claims
- Hydrocodone-Acetaminophen13 claims
- Prednisone11 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.
John E. Mertz among 1,348 emergency medicine physician records in Minnesota
John E. Mertz, MD PHD is one of 1,348 emergency medicine physician records with a practice address in Minnesota. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 63% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2007 · 45% 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 Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 emergency medicine physician records list a practice address in St Cloud
They are 10 of the 474 NPPES records with a practice address in St Cloud, and 1,348 emergency medicine physician records in Minnesota.
All 1,348 in Minnesota → Every provider in St Cloud → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Mark Hoffmann, MDSt Cloud, MN 563011770559148
- Michael Severson, MDSt Cloud, MN 563011477528057
- Donald Blowers, MDSaint Cloud, MN 563031356390058
- Paul Brunik, DOSt Cloud, MN 563031366533507
- Michael Butts, MDSaint Cloud, MN 563031235102039
- Peter Charvat, MDSt Cloud, MN 563031235104993
- Daniel Fark, MDSt Cloud, MN 563031144293945
- Anthony Haas, MDSt Cloud, MN 563031326011933
Common questions
What is John E. Mertz, MD PHD's NPI number?
John E. Mertz, MD PHD's National Provider Identifier (NPI) is 1346217874, issued on Mar 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John E. Mertz, MD PHD located?
The NPPES record lists a practice address at 1406 6 Ave N, St Cloud, MN, 56301. Phone: (320) 255-5657. Providers update this record themselves, so call before visiting.
How can I verify John E. Mertz, MD PHD's license?
NPPES lists Minnesota license number 43425, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John E. Mertz, MD PHD prescribe under Medicare Part D?
In 2024, John E. Mertz, MD PHD had 100 Medicare Part D claims for 69 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.