Dr. Brendan James Tamm, MD
- Medicare services, 2024
- 653
- Medicare patients, 2024
- 297
- Part D claims, 2024
- 194
- Hospital affiliations
- 1
- Industry payments
- $2,234
- 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. Tamm'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. Brendan James Tamm is an ophthalmologist in Baltimore, Maryland
Dr. Tamm practices at University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System.
Dr. Tamm's NPI, 1760945075, was assigned on April 12, 2019. Dr. Tamm holds Maryland license D0097029.
- NPI
- 1760945075NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476910704
- NPI enumeration date
- April 12, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- 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; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Brendan James Tamm practices at University of Maryland Medical Center in Baltimore, Maryland
Dr. Tamm'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. Brendan James Tamm is affiliated with 1 site of care and 2 medical groups
Dr. Tamm'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 Privia Medical Group. Dmand AI also links Dr. Tamm to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Brendan James Tamm's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tamm practices. 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 medical group | 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. Brendan James Tamm is one of 471 ophthalmologists in Maryland
Ophthalmology is Dr. Tamm's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Tamm is licensed in Maryland.
Specialties and state licenses
- Ophthalmology, MarylandPrimary
Ophthalmologists near Dr. Tamm
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. Brendan James Tamm billed Medicare for 653 services in 2024
CMS data shows 653 Medicare services from Dr. Tamm across 9 procedure codes in 2024, for 297 Medicare patients. Medicare paid $43,809 for them. Every service was in an office.
Dr. Tamm's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 352024: 298751%
- Tests and treatments
- 2023: 02024: 197
- Other services
- 2023: 02024: 158
Dr. Tamm compared with the Maryland median for ophthalmologists, 2024
- Dr. Tamm
- Maryland median
- Medicare services
- 653vs 1,38853% below
- Medicare patients
- 297vs 62352% below
- Part D claims
- 70vs 38082% below
Medians across 487 ophthalmologists in Maryland with Dmand AI profiles that report each measure.
Dr. Tamm's 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.
Need commercial claims for Dr. Tamm?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tamm and other ophthalmologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Brendan James Tamm treated 297 Medicare patients in 2024, average age 75
CMS counts 297 Medicare patients who saw Dr. Tamm in 2024. The largest group is 65 to 74, with 129 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 14% are also on Medicaid. Their average risk score is 1.27, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Tamm's median patient age at 68, with 54% women.
Dr. Tamm's Medicare patients by age, 2024
Dr. Tamm's Medicare patients by sex, 2024
- Women18061%
- Men11739%
Chronic conditions among Dr. Tamm's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis41%
- Diabetes34%
- Ischemic heart disease26%
- Anxiety21%
- Chronic kidney disease21%
- Cancer19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tamm's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Brendan James Tamm wrote 194 Medicare Part D claims in 2024
In 2024, Dr. Tamm wrote 194 Medicare Part D claims for 94 patients. 38% of them were for generic drugs. CMS names the drug for 70 of them, across 4 drugs with 11 or more claims each, at $11,784 in total drug cost. In 2023, CMS named 84 claims across 4 drugs.
Dr. Tamm's Part D claims by kind of drug, 2024
- Generic74 claims38%
- Brand-name120 claims62%
Dr. Tamm'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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 842024: 7017%
Drugs named by CMS: 4 in 2024, 4 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
Dr. Brendan James Tamm ranks in the 74th percentile for cataract surgery in Medicare
Dr. Tamm accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 99 procedures of cataract surgery by Dr. Tamm, more than 74% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Tamm ranks in Medicare procedure volume
- Cataract surgery
- 74th percentile99 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Brendan James Tamm received $2,234 in industry payments from 2023 to 2025
CMS Open Payments shows 58 general payments to Dr. Tamm from 15 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $414.
General payments to Dr. Tamm by program year, 2023 to 2025
Companies that paid Dr. Tamm the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Brendan James Tamm'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)Medicare Part D Prescribers - by Provider (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)Doctors and Clinicians Utilization Data (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 Dr. Brendan James Tamm
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. Brendan James Tamm's NPI number?
Dr. Brendan James Tamm's NPI number is 1760945075. It was assigned on April 12, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Brendan James Tamm?
Dr. Brendan James Tamm is an ophthalmologist in Baltimore, Maryland. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Brendan James Tamm practice?
Dr. Tamm practices at 22 South Greene Street, Baltimore, MD 21201. Dr. Tamm's primary practice is University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System. Dmand AI also links Dr. Tamm to 1 medical group.
What is Dr. Brendan James Tamm's office phone number?
The practice phone on file for Dr. Tamm is (410) 328-8667.
What is Dr. Brendan James Tamm's medical license number?
Dr. Tamm holds Maryland license D0097029.
Which hospitals is Dr. Brendan James Tamm affiliated with?
Dr. Tamm practices at University of Maryland Medical Center in Baltimore, Maryland.
What medical group is Dr. Brendan James Tamm part of?
Dr. Tamm is linked to Privia Medical Group. Dmand AI links Dr. Tamm to 1 more medical group.
Does Dr. Brendan James Tamm accept Medicare?
Yes. CMS data shows Dr. Tamm billed Medicare for 653 services in 2024, and Dr. Tamm accepts Medicare assignment.
How many Medicare patients does Dr. Brendan James Tamm see?
CMS counts 297 Medicare patients who saw Dr. Tamm in 2024, with an average age of 75.
What services does Dr. Brendan James Tamm bill to Medicare?
In 2024, Dr. Tamm's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and eye exam or test (92134).
Show 3 more questionsShow fewer questions
What drugs does Dr. Brendan James Tamm prescribe most?
In 2024 Medicare Part D data, Dr. Tamm's most prescribed drugs by claims were Prednisolone Acetate, Restasis and Moxifloxacin.
Has Dr. Brendan James Tamm received payments from drug or device companies?
CMS Open Payments shows $2,234 in general payments to Dr. Tamm from 15 companies from 2023 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Brendan James Tamm been practicing?
Dr. Tamm graduated from medical school in 2019, 7 years ago.
Selling to ophthalmology practices?
See ophthalmologists in Maryland by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card