Dr. Mary Louise Z. Collins, MD
- Medicare services, 2024
- 512
- Medicare patients, 2024
- 310
- Part D claims, 2017
- 11
- Hospital affiliations
- 1
- Industry payments
- $204
- Practice address
- 6701 North Charles Street, Baltimore, MD 21204
- Practice phone
- Call (443) 849-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Collins' professional email, personal email and mobile number
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Dr. Mary Louise Z. Collins is an ophthalmologist in Towson, Maryland
Dr. Collins practices at Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare.
Dr. Collins' NPI, 1063431724, was assigned on July 19, 2006. Dr. Collins graduated from Georgetown University School of Medicine in 1988. Dr. Collins holds Maryland license D44743.
- NPI
- 1063431724NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537284872
- NPI enumeration date
- July 19, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (443) 849-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mary Louise Z. Collins practices at Greater Baltimore Medical Center in Baltimore, Maryland
Dr. Collins' primary practice is Greater Baltimore Medical Center, at 6701 North Charles Street, Baltimore, MD 21204 in Baltimore County. The practice phone is (443) 849-2000.
- Greater Baltimore Medical Center6701 North Charles Street, Baltimore, MD 21204 · Baltimore CountyPhone(443) 849-2000
Source: Dmand AI Affiliation Data
Dr. Mary Louise Z. Collins is affiliated with 3 sites of care and 2 medical groups
Dr. Collins' primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare. The medical group on file is Greater Baltimore Medical Center (GBMC). Dmand AI also links Dr. Collins to 2 more group practices and clinics and 1 medical group, 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. Mary Louise Z. Collins' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Collins practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greater Baltimore Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across GBMC HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mary Louise Z. Collins is one of 471 ophthalmologists in Maryland
Ophthalmology is Dr. Collins' primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Collins is licensed in Maryland.
Specialties and state licenses
- Ophthalmology, MarylandPrimary
Ophthalmologists near Dr. Collins
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. Mary Louise Z. Collins billed Medicare for 512 services in 2024
CMS data shows 512 Medicare services from Dr. Collins across 4 procedure codes in 2024, for 310 Medicare patients. Medicare paid $16,155 for them. Every service was in an office.
Dr. Collins' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1992024: 2032%
- Imaging
- 2023: 1602024: 19019%
- Office and hospital visits
- 2023: 1282024: 1197%
Dr. Collins compared with the Maryland median for ophthalmologists, 2024
- Dr. Collins
- Maryland median
- Medicare services
- 512vs 1,38863% below
- Medicare patients
- 310vs 62350% below
- Part D claims
- 11vs 38097% below
Medians across 487 ophthalmologists in Maryland with Dmand AI profiles that report each measure.
Dr. Collins' most billed Medicare procedure codes, 2024
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. Collins and other ophthalmologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mary Louise Z. Collins treated 310 Medicare patients in 2024, average age 76
CMS counts 310 Medicare patients who saw Dr. Collins in 2024. The largest group is 75 to 84, with 149 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 5% are also on Medicaid. Their average risk score is 1.02, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Collins' median patient age at 12, with 40% women.
Dr. Collins' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Collins' Medicare patients by sex, 2024
- Women18359%
- Men12741%
Chronic conditions among Dr. Collins' Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis46%
- Diabetes25%
- Ischemic heart disease25%
- Anxiety23%
- Atrial fibrillation20%
- Mood disorders20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Collins' 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
- Women40%
- Men60%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mary Louise Z. Collins wrote 11 Medicare Part D claims in 2017
In 2017, Dr. Collins wrote 11 Medicare Part D claims. They cover 1 drug, with $119 in total drug cost.
Dr. Collins' most prescribed drugs by claims, 2017
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Mary Louise Z. Collins takes part in Medicare
Dr. Collins accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mary Louise Z. Collins received $204 in industry payments from 2018 to 2025
CMS Open Payments shows 7 general payments to Dr. Collins from 5 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 90% of the total. Bristol-Myers Squibb Company paid the most, $122.
General payments to Dr. Collins by program year, 2018 to 2025
General payments to Dr. Collins by kind, 2018 to 2025
- Food and beverage$18490%
- Gifts$1910%
- Education$10%
Companies that paid Dr. Collins the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mary Louise Z. Collins graduated from Georgetown University School of Medicine
Dr. Collins graduated from Georgetown University School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mary Louise Z. Collins'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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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. Mary Louise Z. Collins
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. Mary Louise Z. Collins' NPI number?
Dr. Mary Louise Z. Collins' NPI number is 1063431724. It was assigned on July 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mary Louise Z. Collins?
Dr. Mary Louise Z. Collins is an ophthalmologist in Towson, Maryland. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Mary Louise Z. Collins practice?
Dr. Collins practices at 6701 North Charles Street, Baltimore, MD 21204. Dr. Collins' primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare. Dmand AI also links Dr. Collins to 2 group practices and clinics and 1 medical group.
What is Dr. Mary Louise Z. Collins' office phone number?
The practice phone on file for Dr. Collins is (443) 849-2000.
What is Dr. Mary Louise Z. Collins' medical license number?
Dr. Collins holds Maryland license D44743.
Which hospitals is Dr. Mary Louise Z. Collins affiliated with?
Dr. Collins practices at Greater Baltimore Medical Center in Baltimore, Maryland.
What medical group is Dr. Mary Louise Z. Collins part of?
Dr. Collins is linked to Greater Baltimore Medical Center (GBMC). Dmand AI links Dr. Collins to 1 more medical group.
Does Dr. Mary Louise Z. Collins accept Medicare?
Yes. CMS data shows Dr. Collins billed Medicare for 512 services in 2024, and Dr. Collins accepts Medicare assignment.
How many Medicare patients does Dr. Mary Louise Z. Collins see?
CMS counts 310 Medicare patients who saw Dr. Collins in 2024, with an average age of 76.
What services does Dr. Mary Louise Z. Collins bill to Medicare?
In 2024, Dr. Collins' most billed Medicare services were ultrasound (76519), eye exam or test (92060) and office visit, established patient (99211).
Show 4 more questionsShow fewer questions
Where did Dr. Mary Louise Z. Collins go to medical school?
Dr. Collins graduated from Georgetown University School of Medicine in 1988.
What drugs does Dr. Mary Louise Z. Collins prescribe most?
In 2017 Medicare Part D data, Dr. Collins' most prescribed drugs by claims were Erythromycin.
Has Dr. Mary Louise Z. Collins received payments from drug or device companies?
CMS Open Payments shows $204 in general payments to Dr. Collins from 5 companies from 2018 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Mary Louise Z. Collins been practicing?
Dr. Collins graduated from medical school in 1988, 38 years ago.
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