Dr. Brett Dennis Gerwin, MD
- Medicare services, 2024
- 10,017
- Medicare patients, 2024
- 574
- Part D claims, 2024
- 242
- Publications
- 2
- MIPS score, 2024
- 99
- Practice address
- 979 E 3rd St, Chattanooga, TN 37403
- Practice phone
- Call (423) 757-0860
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Surgical Associates
Chattanooga, Tennessee
Find Dr. Gerwin'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. Brett Dennis Gerwin is an ophthalmologist in Chattanooga, Tennessee
Dr. Gerwin practices at University Surgical Associates in Chattanooga, Tennessee.
Dr. Gerwin's NPI, 1306992003, was assigned on January 26, 2007. Dr. Gerwin graduated from University of Alabama School of Medicine in 2007. Dr. Gerwin holds Tennessee license 45994.
- NPI
- 1306992003NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901997907
- NPI enumeration date
- January 26, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (423) 757-0860
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Brett Dennis Gerwin practices at University Surgical Associates in Chattanooga, Tennessee
Dr. Gerwin's primary practice is University Surgical Associates, at 979 E 3rd St, Chattanooga, TN 37403 in Hamilton County. The practice phone is (423) 757-0860.
- University Surgical Associates979 E 3rd St, Chattanooga, TN 37403 · Hamilton CountyPhone(423) 757-0860
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Brett Dennis Gerwin is affiliated with 4 sites of care
Dr. Gerwin's primary practice is University Surgical Associates in Chattanooga, Tennessee. Dr. Gerwin is also affiliated with Erlanger Baroness Hospital. Dmand AI also links Dr. Gerwin to 1 more hospital and 1 physician office, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Brett Dennis Gerwin's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gerwin practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Surgical Associates | Available with a free account |
| +3 more affiliated sites | 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 each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Brett Dennis Gerwin is one of 310 ophthalmologists in Tennessee
Ophthalmology is Dr. Gerwin's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dmand AI has Dr. Gerwin's licenses on file in 2 states: Tennessee and Alabama.
Specialties and state licenses
- Ophthalmology, TennesseePrimary
- Alabama license
Ophthalmologists near Dr. Gerwin
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. Brett Dennis Gerwin billed Medicare for 10,017 services in 2024
CMS data shows 10,017 Medicare services from Dr. Gerwin across 13 procedure codes in 2024, for 574 Medicare patients. Medicare paid $741,876 for them. Every service was in an office.
Dr. Gerwin's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 2,1842024: 6,746209%
- Tests and treatments
- 2023: 2,0402024: 2,0742%
- Surgery
- 2023: 1,1442024: 1,148No change
- Office and hospital visits
- 2023: 452024: 2936%
- Imaging
- 2023: 272024: 2026%
Dr. Gerwin compared with the Tennessee median for ophthalmologists, 2024
- Dr. Gerwin
- Tennessee median
- Medicare services
- 10,017vs 1,5846.3 times
- Medicare patients
- 574vs 63610% below
- Part D claims
- 151vs 63376% below
Medians across 333 ophthalmologists in Tennessee with Dmand AI profiles that report each measure.
Dr. Gerwin'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. Gerwin?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gerwin and other ophthalmologists in Tennessee.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Brett Dennis Gerwin treated 574 Medicare patients in 2024, average age 77
CMS counts 574 Medicare patients who saw Dr. Gerwin in 2024. The largest group is 65 to 74, with 235 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 3% are also on Medicaid. Their average risk score is 1.30, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Gerwin's median patient age at 74, with 56% women.
Dr. Gerwin's Medicare patients by age, 2024
Dr. Gerwin's Medicare patients by sex, 2024
- Women32356%
- Men25144%
Chronic conditions among Dr. Gerwin's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Diabetes35%
- Ischemic heart disease34%
- Chronic kidney disease31%
- Atrial fibrillation21%
- Mood disorders21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gerwin's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Brett Dennis Gerwin wrote 242 Medicare Part D claims in 2024
In 2024, Dr. Gerwin wrote 242 Medicare Part D claims for 64 patients. 46% of them were for generic drugs. CMS names the drug for 151 of them, across 6 drugs with 11 or more claims each, at $96,138 in total drug cost. In 2023, CMS named 170 claims across 7 drugs.
Dr. Gerwin's Part D claims by kind of drug, 2024
- Generic112 claims46%
- Brand-name130 claims54%
Dr. Gerwin'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: 1702024: 15111%
Drugs named by CMS: 6 in 2024, 7 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. Brett Dennis Gerwin scored 99 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 99 out of 100 for Dr. Gerwin for performance year 2024, reported individually. Dr. Gerwin accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Gerwin's MIPS scores, performance year 2024
- 99of 100Final score
- 97.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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. Brett Dennis Gerwin has 2 publications on record
Dmand AI links 2 papers to Dr. Gerwin. Dr. Gerwin has published most often in Retin Cases Brief Rep. Dr. Gerwin's most frequent co-author is Russell W. Read, MD.
Dr. Gerwin's most frequent co-authors
Recent publications by Dr. Gerwin
Retin Cases Brief Rep
See who Dr. Gerwin researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gerwin works with, so you can find a warm path to the right ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Brett Dennis Gerwin received $1,540 in industry payments from 2016 to 2025
CMS Open Payments shows 36 general payments to Dr. Gerwin from 11 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Regeneron Pharmaceuticals, Inc. paid the most, $645.
General payments to Dr. Gerwin by program year, 2016 to 2025
General payments to Dr. Gerwin by kind, 2016 to 2025
- Food and beverage$1,49497%
- Education$463%
Companies that paid Dr. Gerwin the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Brett Dennis Gerwin graduated from University of Alabama School of Medicine
Dr. Gerwin graduated from University of Alabama School of Medicine in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Brett Dennis Gerwin'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 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Brett Dennis Gerwin
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. Brett Dennis Gerwin's NPI number?
Dr. Brett Dennis Gerwin's NPI number is 1306992003. It was assigned on January 26, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Brett Dennis Gerwin?
Dr. Brett Dennis Gerwin is an ophthalmologist in Chattanooga, Tennessee. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Brett Dennis Gerwin practice?
Dr. Gerwin practices at 979 E 3rd St, Chattanooga, TN 37403. Dr. Gerwin's primary practice is University Surgical Associates in Chattanooga, Tennessee. Dmand AI also links Dr. Gerwin to 1 hospital and 1 physician office.
What is Dr. Brett Dennis Gerwin's office phone number?
The practice phone on file for Dr. Gerwin is (423) 757-0860.
What is Dr. Brett Dennis Gerwin's medical license number?
Dr. Gerwin holds Tennessee license 45994, one of the licenses on file in 2 states.
Which states has Dr. Brett Dennis Gerwin been licensed in?
Dmand AI has state licenses on file for Dr. Gerwin in Tennessee and Alabama.
Which hospitals is Dr. Brett Dennis Gerwin affiliated with?
Dr. Gerwin is affiliated with Erlanger Baroness Hospital. Dmand AI links Dr. Gerwin to 1 more hospital.
Does Dr. Brett Dennis Gerwin accept Medicare?
Yes. CMS data shows Dr. Gerwin billed Medicare for 10,017 services in 2024, and Dr. Gerwin accepts Medicare assignment.
What is Dr. Brett Dennis Gerwin's MIPS score?
Dr. Gerwin's MIPS final score for performance year 2024 is 99 out of 100, reported individually.
How many Medicare patients does Dr. Brett Dennis Gerwin see?
CMS counts 574 Medicare patients who saw Dr. Gerwin in 2024, with an average age of 77.
Show 7 more questionsShow fewer questions
What services does Dr. Brett Dennis Gerwin bill to Medicare?
In 2024, Dr. Gerwin's most billed Medicare services were injected or infused drug (J2777), eye exam or test (92134) and surgery: eye (67028).
Where did Dr. Brett Dennis Gerwin go to medical school?
Dr. Gerwin graduated from University of Alabama School of Medicine in 2007.
What drugs does Dr. Brett Dennis Gerwin prescribe most?
In 2024 Medicare Part D data, Dr. Gerwin's most prescribed drugs by claims were Prednisolone Acetate, Eylea and Ketorolac Tromethamine.
Has Dr. Brett Dennis Gerwin received payments from drug or device companies?
CMS Open Payments shows $1,540 in general payments to Dr. Gerwin from 11 companies from 2016 to 2025. The largest total came from Regeneron Pharmaceuticals, Inc.
How long has Dr. Brett Dennis Gerwin been practicing?
Dr. Gerwin graduated from medical school in 2007, 19 years ago.
Does Dr. Brett Dennis Gerwin do research?
Dmand AI links 2 publications to Dr. Gerwin.
Who does Dr. Brett Dennis Gerwin publish with?
Dr. Gerwin's most frequent co-authors are Russell W. Read, MD (1 shared paper).
Selling to ophthalmology practices?
See ophthalmologists in Tennessee 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