John T. Barker, OD
- Medicare patients, 2024
- 15
- Industry payments
- $113
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 975 Peachtree Pkwy A, Cumming, GA 30041-6844
- Practice phone
- Call (678) 208-2375
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Forsight Eye Center
Eye care practice · Cumming, Georgia
Find John Barker'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.
John T. Barker is an optometrist in Cumming, Georgia
John Barker practices at Forsight Eye Center in Cumming, Georgia.
John Barker's NPI, 1629111083, was assigned on February 15, 2007. John Barker holds Georgia license OPT001877.
- NPI
- 1629111083NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890838593
- NPI enumeration date
- February 15, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (678) 208-2375
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
John T. Barker practices at Forsight Eye Center in Cumming, Georgia
John Barker's primary practice is Forsight Eye Center, at 975 Peachtree Pkwy A, Cumming, GA 30041-6844. The practice phone is (678) 208-2375.
- Forsight Eye Center975 Peachtree Pkwy A, Cumming, GA 30041-6844Phone(678) 208-2375
Source: Dmand AI Affiliation Data
John T. Barker is affiliated with 1 site of care and 1 medical group
John Barker's primary practice is Forsight Eye Center in Cumming, Georgia. Dmand AI also links John Barker to 1 medical group, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at John T. Barker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Barker practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Forsight Eye Center | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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John T. Barker is one of 1,059 optometrists in Georgia
Optometrist is John Barker's primary specialty in the NPI Registry, under taxonomy code 152W00000X. John Barker is licensed in Georgia.
Specialties and state licenses
- Optometrist, GeorgiaPrimary
Optometrists near John Barker
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
John T. Barker treated 15 Medicare patients in 2024, average age 75
CMS counts 15 Medicare patients who saw John Barker in 2024. The largest group is under 65, with 0 patients. 73% of them have high cholesterol. Their average risk score is 1.18, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts John Barker's median patient age at 68, with 64% women.
John Barker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among John Barker's Medicare patients, 2024
- High cholesterol73%
Share of Medicare patients with each condition. A patient can have several.
John Barker'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
- Women64%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How John T. Barker takes part in Medicare
John Barker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
John T. Barker received $113 in industry payments in 2025
CMS Open Payments shows 4 general payments to John Barker from 3 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Sanofi and Genzyme US Companies paid the most, $50.
Companies that paid John Barker the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for John T. Barker'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 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) |
| 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 John T. Barker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John T. Barker's NPI number?
John T. Barker's NPI number is 1629111083. It was assigned on February 15, 2007, and it is active in the NPI Registry.
What does John T. Barker specialize in?
John T. Barker is an optometrist in Cumming, Georgia. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does John T. Barker practice?
John Barker practices at 975 Peachtree Pkwy A, Cumming, GA 30041-6844. John Barker's primary practice is Forsight Eye Center in Cumming, Georgia. Dmand AI also links John Barker to 1 medical group.
What is John T. Barker's office phone number?
The practice phone on file for John Barker is (678) 208-2375.
What is John T. Barker's medical license number?
John Barker holds Georgia license OPT001877.
Does John T. Barker accept Medicare?
Yes. CMS lists John Barker as accepting Medicare assignment.
How many Medicare patients does John T. Barker see?
CMS counts 15 Medicare patients who saw John Barker in 2024, with an average age of 75.
Has John T. Barker received payments from drug or device companies?
CMS Open Payments shows $113 in general payments to John Barker from 3 companies from 2025 to 2025. The largest total came from Sanofi and Genzyme US Companies.
How long has John T. Barker been practicing?
John Barker graduated from medical school in 2000, 26 years ago.
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