Dr. John E. Mertz, MD, PhD
- Medicare services, 2023
- 714
- Part D claims, 2024
- 100
- Hospital affiliations
- 1
- Medical groups
- 7
- State license
- 1
- Practice address
- 200 1st Street West, Paynesville, MN 56362
- Practice phone
- Call (320) 243-3767
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mertz's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John E. Mertz is an emergency medicine physician in Paynesville, Minnesota
Dr. Mertz practices at CentraCare - Paynesville Hospital in Paynesville, Minnesota, part of CentraCare Health System.
Dr. Mertz's NPI, 1346217874, was assigned on March 3, 2006. Dr. Mertz holds Minnesota license 43425.
- NPI
- 1346217874NPI Registry (opens in a new tab)
- NPI enumeration date
- March 3, 2006
- NPI status
- Active
- Practice phone
- (320) 243-3767
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. John E. Mertz practices at CentraCare - Paynesville Hospital in Paynesville, Minnesota
Dr. Mertz's primary practice is CentraCare - Paynesville Hospital, at 200 1st Street West, Paynesville, MN 56362 in Stearns County. The practice phone is (320) 243-3767.
- CentraCare - Paynesville Hospital200 1st Street West, Paynesville, MN 56362 · Stearns CountyPhone(320) 243-3767
Source: Dmand AI Affiliation Data
Dr. John E. Mertz is affiliated with 2 sites of care and 7 medical groups
Dr. Mertz's primary practice is CentraCare - Paynesville Hospital in Paynesville, Minnesota, part of CentraCare Health System. The medical group on file is CentraCare - Paynesville Clinic. Dmand AI also links Dr. Mertz to 6 more medical groups and 1 breast imaging center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John E. Mertz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mertz practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| CentraCare - Paynesville Hospital | Available with a free account |
| +1 more site and 6 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John E. Mertz is one of 1,097 emergency medicine physicians in Minnesota
Emergency medicine is Dr. Mertz's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Mertz is licensed in Minnesota.
Specialties and state licenses
- Emergency medicine, MinnesotaPrimary
Emergency medicine physicians near Dr. Mertz
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John E. Mertz billed Medicare for 714 services in 2023
CMS data shows 714 Medicare services from Dr. Mertz across 5 procedure codes in 2023. Medicare paid $54,363 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mertz's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 6102023: 48121%
- Tests and treatments
- 2022: 3572023: 23335%
Dr. Mertz compared with the Minnesota median for emergency medicine physicians, 2023
- Dr. Mertz
- Minnesota median
- Medicare services
- 714vs 2383.0 times
- Part D claims
- 39vs 427% below
Medians across 1,063 emergency medicine physicians in Minnesota with Dmand AI profiles that report each measure.
Dr. Mertz's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mertz and other emergency medicine physicians in Minnesota.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John E. Mertz's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Dr. Mertz's median patient age at 75, with 52% women.
Dr. Mertz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women52%
- Men48%
Source: Dmand AI Patient Panel Data
Dr. John E. Mertz wrote 100 Medicare Part D claims in 2024
In 2024, Dr. Mertz wrote 100 Medicare Part D claims for 69 patients. 94% of them were for generic drugs. CMS names the drug for 39 of them, across 3 drugs with 11 or more claims each, at $179 in total drug cost. In 2023, CMS named 106 claims across 6 drugs.
Dr. Mertz's Part D claims by kind of drug, 2024
- Generic94 claims94%
- Brand-name and other6 claims6%
Dr. Mertz's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Mertz's Part D claims, 2024
- Opioids24%24 of 100 claims
- Antibiotics29%29 of 100 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1062024: 3963%
Drugs named by CMS: 3 in 2024, 6 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Sources for Dr. John E. Mertz's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John E. Mertz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John E. Mertz's NPI number?
Dr. John E. Mertz's NPI number is 1346217874. It was assigned on March 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John E. Mertz?
Dr. John E. Mertz is an emergency medicine physician in Paynesville, Minnesota. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. John E. Mertz practice?
Dr. Mertz practices at 200 1st Street West, Paynesville, MN 56362. Dr. Mertz's primary practice is CentraCare - Paynesville Hospital in Paynesville, Minnesota, part of CentraCare Health System. Dmand AI also links Dr. Mertz to 6 medical groups and 1 breast imaging center.
What is Dr. John E. Mertz's office phone number?
The practice phone on file for Dr. Mertz is (320) 243-3767.
What is Dr. John E. Mertz's medical license number?
Dr. Mertz holds Minnesota license 43425.
Which hospitals is Dr. John E. Mertz affiliated with?
Dr. Mertz practices at CentraCare - Paynesville Hospital in Paynesville, Minnesota.
What medical group is Dr. John E. Mertz part of?
Dr. Mertz is linked to CentraCare - Paynesville Clinic. Dmand AI links Dr. Mertz to 6 more medical groups.
Does Dr. John E. Mertz accept Medicare?
Yes. CMS data shows Dr. Mertz billed Medicare for 714 services in 2023.
What services does Dr. John E. Mertz bill to Medicare?
In 2023, Dr. Mertz's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
What drugs does Dr. John E. Mertz prescribe most?
In 2024 Medicare Part D data, Dr. Mertz's most prescribed drugs by claims were Doxycycline Hyclate, Hydrocodone-Acetaminophen and Prednisone.
How long has Dr. John E. Mertz been practicing?
Dr. Mertz graduated from medical school in 1999, 27 years ago.
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