Dr. Mark W. Preslan, MD
- Medicare services, 2023
- 52
- Industry payments
- $70
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 7671 Quarterfield Rd, Glen Burnie, MD 21061
- Practice phone
- Call (410) 571-2946
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Bay Surgery Centers - Glen Burnie
Glen Burnie, Maryland
Find Dr. Preslan'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 W. Preslan is an ophthalmologist in Glen Burnie, Maryland
Dr. Preslan practices at Bay Surgery Centers - Glen Burnie in Glen Burnie, Maryland.
Dr. Preslan's NPI, 1356383293, was assigned on June 12, 2006. Dr. Preslan graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 1981. Dr. Preslan holds Maryland license D0033771.
- NPI
- 1356383293NPI Registry (opens in a new tab)
- NPI enumeration date
- June 12, 2006
- NPI status
- Active
- Practice phone
- (410) 571-2946
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Mark W. Preslan practices at Bay Surgery Centers - Glen Burnie in Glen Burnie, Maryland
Dr. Preslan's primary practice is Bay Surgery Centers - Glen Burnie, at 7671 Quarterfield Rd, Glen Burnie, MD 21061 in Anne Arundel County. The practice phone is (410) 571-2946.
- Bay Surgery Centers - Glen Burnie7671 Quarterfield Rd, Glen Burnie, MD 21061 · Anne Arundel CountyPhone(410) 571-2946
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark W. Preslan is affiliated with 2 sites of care
Dr. Preslan's primary practice is Bay Surgery Centers - Glen Burnie in Glen Burnie, Maryland. Dmand AI also links Dr. Preslan to 1 physician office, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark W. Preslan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Preslan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bay Surgery Centers - Glen Burnie | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark W. Preslan is one of 471 ophthalmologists in Maryland
Ophthalmology is Dr. Preslan's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Preslan is licensed in Maryland.
Specialties and state licenses
- Ophthalmology, MarylandPrimary
Ophthalmologists near Dr. Preslan
Counts of ophthalmologists 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 W. Preslan billed Medicare for 52 services in 2023
CMS data shows 52 Medicare services from Dr. Preslan across 2 procedure codes in 2023. Medicare paid $3,877 for them. Every service was in an office.
Dr. Preslan's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Tests and treatments
- 2022: 452023: 3522%
- Office and hospital visits
- 2022: 112023: 1755%
Dr. Preslan compared with the Maryland median for ophthalmologists, 2023
- Dr. Preslan
- Maryland median
- Medicare services
- 52vs 1,38896% below
Medians across 487 ophthalmologists in Maryland with Dmand AI profiles that report each measure.
Dr. Preslan'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. Preslan and other ophthalmologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark W. Preslan's patients have a median age of 12
Across all payers, Dmand AI patient panel data puts Dr. Preslan's median patient age at 12, with 58% women.
Dr. Preslan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 12
Patient panel by sex, all payers
- Women58%
- Men42%
Source: Dmand AI Patient Panel Data
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Dr. Mark W. Preslan received $70 in industry payments from 2016 to 2019
CMS Open Payments shows 2 general payments to Dr. Preslan from 2 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 99% of the total. Alcon Research Ltd paid the most, $69.
General payments to Dr. Preslan by program year, 2016 to 2019
General payments to Dr. Preslan by kind, 2016 to 2019
- Food and beverage$6999%
- Education$11%
Companies that paid Dr. Preslan the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark W. Preslan graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University
Dr. Preslan graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 1981.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark W. Preslan'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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 W. Preslan
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 W. Preslan's NPI number?
Dr. Mark W. Preslan's NPI number is 1356383293. It was assigned on June 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark W. Preslan?
Dr. Mark W. Preslan is an ophthalmologist in Glen Burnie, Maryland. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Mark W. Preslan practice?
Dr. Preslan practices at 7671 Quarterfield Rd, Glen Burnie, MD 21061. Dr. Preslan's primary practice is Bay Surgery Centers - Glen Burnie in Glen Burnie, Maryland. Dmand AI also links Dr. Preslan to 1 physician office.
What is Dr. Mark W. Preslan's office phone number?
The practice phone on file for Dr. Preslan is (410) 571-2946.
What is Dr. Mark W. Preslan's medical license number?
Dr. Preslan holds Maryland license D0033771.
Does Dr. Mark W. Preslan accept Medicare?
Yes. CMS data shows Dr. Preslan billed Medicare for 52 services in 2023.
What services does Dr. Mark W. Preslan bill to Medicare?
In 2023, Dr. Preslan's most billed Medicare services were eye exam or test (92060) and office visit, new patient (99204).
Where did Dr. Mark W. Preslan go to medical school?
Dr. Preslan graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 1981.
Has Dr. Mark W. Preslan received payments from drug or device companies?
CMS Open Payments shows $70 in general payments to Dr. Preslan from 2 companies from 2016 to 2019. The largest total came from Alcon Research Ltd.
How long has Dr. Mark W. Preslan been practicing?
Dr. Preslan graduated from medical school in 1981, 45 years ago.
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