Brian G B Gaster, OD
- Medicare patients, 2024
- 206
- Part D claims, 2024
- 421
- Industry payments
- $413
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 2101 Greentree Rd, Pittsburgh, PA 15220
- Practice phone
- Call (412) 429-2020
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Alexander Chang MD
Pittsburgh, Pennsylvania
Find Brian Gaster'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.
Brian G B Gaster is an optometrist in Pittsburgh, Pennsylvania
Brian Gaster practices at Alexander Chang MD in Pittsburgh, Pennsylvania.
Brian Gaster's NPI, 1922099639, was assigned on November 2, 2005. Brian Gaster graduated from Pennsylvania College of Optometry in 1999. Brian Gaster holds Nevada license 898.
- NPI
- 1922099639NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941306815
- NPI enumeration date
- November 2, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (412) 429-2020
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Brian G B Gaster practices at Alexander Chang MD in Pittsburgh, Pennsylvania
Brian Gaster's primary practice is Alexander Chang MD, at 2101 Greentree Rd, Pittsburgh, PA 15220 in Allegheny County. The practice phone is (412) 429-2020.
- Alexander Chang MD2101 Greentree Rd, Pittsburgh, PA 15220 · Allegheny CountyPhone(412) 429-2020
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Brian G B Gaster is affiliated with 3 sites of care and 2 medical groups
Brian Gaster's primary practice is Alexander Chang MD in Pittsburgh, Pennsylvania. Dmand AI also links Brian Gaster to 2 medical groups, 1 group practice or clinic and 1 ambulatory surgery center, each 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 Brian G B Gaster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Brian Gaster practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Alexander Chang MD | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Brian G B Gaster is one of 1,750 optometrists in Pennsylvania
Optometrist is Brian Gaster's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Dmand AI has Brian Gaster's licenses on file in 2 states: Nevada and Pennsylvania.
Specialties and state licenses
- Optometrist, NevadaPrimary
- Pennsylvania license
Optometrists near Brian Gaster
Counts of optometrists 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
Brian G B Gaster treated 206 Medicare patients in 2024, average age 75
CMS counts 206 Medicare patients who saw Brian Gaster in 2024. The largest group is 65 to 74, with 96 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 6% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Brian Gaster's median patient age at 75, with 60% women.
Brian Gaster's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Brian Gaster's Medicare patients by sex, 2024
- Women12159%
- Men8541%
Chronic conditions among Brian Gaster's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis50%
- Diabetes28%
- Ischemic heart disease26%
- Chronic kidney disease21%
- Anxiety20%
- Atrial fibrillation19%
Share of Medicare patients with each condition. A patient can have several.
Brian Gaster's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women60%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Brian G B Gaster wrote 421 Medicare Part D claims in 2024
In 2024, Brian Gaster wrote 421 Medicare Part D claims for 193 patients. 47% of them were for generic drugs.
Brian Gaster's Part D claims by kind of drug, 2024
- Generic198 claims47%
- Brand-name223 claims53%
Drug classes CMS tracks in Brian Gaster's Part D claims, 2024
- Antibiotics3%13 of 421 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Brian G B Gaster takes part in Medicare
Brian Gaster 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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Brian G B Gaster received $413 in industry payments in 2025
CMS Open Payments shows 14 general payments to Brian Gaster from 8 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Bausch & Lomb Americas Inc. paid the most, $169.
Companies that paid Brian Gaster the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Brian G B Gaster graduated from Pennsylvania College of Optometry
Brian Gaster graduated from Pennsylvania College of Optometry in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Brian G B Gaster'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 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 (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 Brian G B Gaster
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Brian G B Gaster's NPI number?
Brian G B Gaster's NPI number is 1922099639. It was assigned on November 2, 2005, and it is active in the NPI Registry.
What does Brian G B Gaster specialize in?
Brian G B Gaster is an optometrist in Pittsburgh, Pennsylvania. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Brian G B Gaster practice?
Brian Gaster practices at 2101 Greentree Rd, Pittsburgh, PA 15220. Brian Gaster's primary practice is Alexander Chang MD in Pittsburgh, Pennsylvania. Dmand AI also links Brian Gaster to 2 medical groups, 1 group practice or clinic and 1 ambulatory surgery center.
What is Brian G B Gaster's office phone number?
The practice phone on file for Brian Gaster is (412) 429-2020.
What is Brian G B Gaster's medical license number?
Brian Gaster holds Nevada license 898, one of the licenses on file in 2 states.
Which states has Brian G B Gaster been licensed in?
Dmand AI has state licenses on file for Brian Gaster in Nevada and Pennsylvania.
Does Brian G B Gaster accept Medicare?
Yes. CMS lists Brian Gaster as accepting Medicare assignment.
How many Medicare patients does Brian G B Gaster see?
CMS counts 206 Medicare patients who saw Brian Gaster in 2024, with an average age of 75.
Where did Brian G B Gaster go to medical school?
Brian Gaster graduated from Pennsylvania College of Optometry in 1999.
Has Brian G B Gaster received payments from drug or device companies?
CMS Open Payments shows $413 in general payments to Brian Gaster from 8 companies from 2025 to 2025. The largest total came from Bausch & Lomb Americas Inc.
How long has Brian G B Gaster been practicing?
Brian Gaster graduated from medical school in 1999, 27 years ago.
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