Dr. Mark Stewart Elkin Mazer, MD
- Hospital affiliations
- 1
- Industry payments
- $179
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2017
- Practice address
- 22 South Greene Street, Baltimore, MD 21201
- Practice phone
- Call (410) 328-8667
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mazer'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. Mark Stewart Elkin Mazer is a psychiatrist in Baltimore, Maryland
Dr. Mazer practices at University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System.
Dr. Mazer's NPI, 1427577105, was assigned on September 14, 2017. Dr. Mazer holds Maryland license D0097631.
- NPI
- 1427577105NPI Registry (opens in a new tab)
- NPI enumeration date
- September 14, 2017
- NPI status
- Active
- Practice phone
- (410) 328-8667
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Mark Stewart Elkin Mazer practices at University of Maryland Medical Center in Baltimore, Maryland
Dr. Mazer's primary practice is University of Maryland Medical Center, at 22 South Greene Street, Baltimore, MD 21201 in Baltimore City. The practice phone is (410) 328-8667.
- University of Maryland Medical Center22 South Greene Street, Baltimore, MD 21201 · Baltimore CityPhone(410) 328-8667
Source: Dmand AI Affiliation Data
Dr. Mark Stewart Elkin Mazer is affiliated with 2 sites of care and 1 medical group
Dr. Mazer's primary practice is University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System. The medical group on file is University of Maryland Psychiatry Associates, P.A. Dmand AI also links Dr. Mazer to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Stewart Elkin Mazer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mazer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University of Maryland Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across University of Maryland Medical System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Stewart Elkin Mazer is one of 901 psychiatrists in Maryland
Psychiatry is Dr. Mazer's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Mazer is licensed in Maryland.
Specialties and state licenses
- Psychiatry, MarylandPrimary
Psychiatrists near Dr. Mazer
Counts of psychiatrists 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. Mark Stewart Elkin Mazer's patients have a median age of 13
Across all payers, Dmand AI patient panel data puts Dr. Mazer's median patient age at 13, with 50% women.
Dr. Mazer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 13
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Mark Stewart Elkin Mazer received $179 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Mazer from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Innovation Technologies Inc paid the most, $179.
Companies that paid Dr. Mazer the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark Stewart Elkin Mazer'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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 Dr. Mark Stewart Elkin Mazer
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. Mark Stewart Elkin Mazer's NPI number?
Dr. Mark Stewart Elkin Mazer's NPI number is 1427577105. It was assigned on September 14, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Stewart Elkin Mazer?
Dr. Mark Stewart Elkin Mazer is a psychiatrist in Baltimore, Maryland. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Mark Stewart Elkin Mazer practice?
Dr. Mazer practices at 22 South Greene Street, Baltimore, MD 21201. Dr. Mazer's primary practice is University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System. Dmand AI also links Dr. Mazer to 1 group practice or clinic.
What is Dr. Mark Stewart Elkin Mazer's office phone number?
The practice phone on file for Dr. Mazer is (410) 328-8667.
What is Dr. Mark Stewart Elkin Mazer's medical license number?
Dr. Mazer holds Maryland license D0097631.
Which hospitals is Dr. Mark Stewart Elkin Mazer affiliated with?
Dr. Mazer practices at University of Maryland Medical Center in Baltimore, Maryland.
What medical group is Dr. Mark Stewart Elkin Mazer part of?
Dr. Mazer is linked to University of Maryland Psychiatry Associates, P.A.
Has Dr. Mark Stewart Elkin Mazer received payments from drug or device companies?
CMS Open Payments shows $179 in general payments to Dr. Mazer from 1 company from 2025 to 2025. The largest total came from Innovation Technologies Inc.
How long has Dr. Mark Stewart Elkin Mazer been practicing?
Dr. Mazer graduated from medical school in 2019, 7 years ago.
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