John Mruzik
- Medicare services, 2021
- 12
- Part D claims, 2024
- 66
- Hospital affiliations
- 2
- Industry payments
- $122
- State license
- 1
- Practice address
- 3015 N Ballas Rd, Saint Louis, MO 63131
- Practice phone
- Call (314) 996-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find John Mruzik'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.
John Mruzik is a family medicine physician in Saint Louis, Missouri
John Mruzik practices at Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health.
John Mruzik's NPI, 1104936566, was assigned on August 30, 2006. John Mruzik holds Missouri license 105840.
- NPI
- 1104936566NPI Registry (opens in a new tab)
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Practice phone
- (314) 996-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
John Mruzik practices at Missouri Baptist Medical Center in Saint Louis, Missouri
John Mruzik's primary practice is Missouri Baptist Medical Center, at 3015 N Ballas Rd, Saint Louis, MO 63131 in St. Louis County. The practice phone is (314) 996-5000.
- Missouri Baptist Medical Center3015 N Ballas Rd, Saint Louis, MO 63131 · St. Louis CountyPhone(314) 996-5000
Source: Dmand AI Affiliation Data
John Mruzik is affiliated with 2 sites of care
John Mruzik's primary practice is Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health. Dmand AI also links John Mruzik to 1 hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John Mruzik's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Mruzik practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Missouri Baptist Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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John Mruzik is one of 2,412 family medicine physicians in Missouri
Family medicine is John Mruzik's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. John Mruzik is licensed in Missouri.
Specialties and state licenses
- Family medicine, MissouriPrimary
Family medicine physicians near John Mruzik
Counts of family 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
John Mruzik billed Medicare for 12 services in 2021
CMS data shows 12 Medicare services from John Mruzik across 1 procedure code in 2021, all of them office visits. Medicare paid $660 for them. Every service was in an office.
John Mruzik's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 3492021: 1297%
- Lab and pathology
- 2020: 402021: 0100%
- Surgery
- 2020: 142021: 0100%
John Mruzik compared with the Missouri median for family medicine physicians, 2021
- John Mruzik
- Missouri median
- Medicare services
- 12vs 33396% below
- Part D claims
- 17vs 1,23199% below
Medians across 2,555 family medicine physicians in Missouri with Dmand AI profiles that report each measure.
John Mruzik's most billed Medicare procedure codes, 2021
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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
John Mruzik's patients have a median age of 49
Across all payers, Dmand AI patient panel data puts John Mruzik's median patient age at 49, with 47% women.
John Mruzik's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women47%
- Men52%
Source: Dmand AI Patient Panel Data
John Mruzik wrote 66 Medicare Part D claims in 2024
In 2024, John Mruzik wrote 66 Medicare Part D claims. 74% of them were for generic drugs. CMS names the drug for 17 of them, across 1 drug with 11 or more claims each, at $204 in total drug cost. In 2021, CMS named 28 claims across 2 drugs.
John Mruzik's Part D claims by kind of drug, 2024
- Generic49 claims74%
- Brand-name17 claims26%
John Mruzik'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.
Part D claims for drugs CMS names, 2021 to 2024
- 2021
- 2024
- Claims for drugs CMS names
- 2021: 282024: 1739%
Drugs named by CMS: 1 in 2024, 2 in 2021.
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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John Mruzik received $122 in industry payments from 2016 to 2019
CMS Open Payments shows 9 general payments to John Mruzik from 4 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. Genentech, Inc. paid the most, $61.
General payments to John Mruzik by program year, 2016 to 2019
Companies that paid John Mruzik the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for John Mruzik'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) |
| Industry payments | Open Payments (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 John Mruzik
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John Mruzik's NPI number?
John Mruzik's NPI number is 1104936566. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What does John Mruzik specialize in?
John Mruzik is a family medicine physician in Saint Louis, Missouri. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does John Mruzik practice?
John Mruzik practices at 3015 N Ballas Rd, Saint Louis, MO 63131. John Mruzik's primary practice is Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health. Dmand AI also links John Mruzik to 1 hospital.
What is John Mruzik's office phone number?
The practice phone on file for John Mruzik is (314) 996-5000.
What is John Mruzik's medical license number?
John Mruzik holds Missouri license 105840.
Which hospitals is John Mruzik affiliated with?
John Mruzik practices at Missouri Baptist Medical Center in Saint Louis, Missouri. Dmand AI links John Mruzik to 1 more hospital.
Does John Mruzik accept Medicare?
Yes. CMS data shows John Mruzik billed Medicare for 12 services in 2021.
What services does John Mruzik bill to Medicare?
In 2021, John Mruzik's most billed Medicare services were office visit, established patient (99213).
What drugs does John Mruzik prescribe most?
In 2024 Medicare Part D data, John Mruzik's most prescribed drugs by claims were Ondansetron ODT.
Has John Mruzik received payments from drug or device companies?
CMS Open Payments shows $122 in general payments to John Mruzik from 4 companies from 2016 to 2019. The largest total came from Genentech, Inc.
How long has John Mruzik been practicing?
John Mruzik's NPI was assigned in 2006.
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