Gregory John Hayes, OD
- Medicare patients, 2024
- 189
- Part D claims, 2024
- 116
- Industry payments
- $387
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 27271 Las Ramblas, Mission Viejo, CA 92691
- Practice phone
- Call (858) 487-5555
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Total Vision
Mission Viejo, California
Find Gregory Hayes' 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.
Gregory John Hayes is an optometrist in Mission Viejo, California
Gregory Hayes practices at Total Vision in Mission Viejo, California.
Gregory Hayes' NPI, 1598896102, was assigned on March 7, 2007. Gregory Hayes graduated from Southern California College of Optometry in 1997. Gregory Hayes holds California license 10952T.
- NPI
- 1598896102NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709830367
- NPI enumeration date
- March 7, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (858) 487-5555
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Gregory John Hayes practices at Total Vision in Mission Viejo, California
Gregory Hayes' primary practice is Total Vision, at 27271 Las Ramblas, Mission Viejo, CA 92691 in Orange County. The practice phone is (858) 487-5555.
- Total Vision27271 Las Ramblas, Mission Viejo, CA 92691 · Orange CountyPhone(858) 487-5555
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Gregory John Hayes is affiliated with 2 sites of care and 1 medical group
Gregory Hayes' primary practice is Total Vision in Mission Viejo, California. Dmand AI also links Gregory Hayes to 1 group practice or clinic and 1 medical group, 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 Gregory John Hayes' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gregory Hayes practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Total Vision | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Gregory John Hayes is one of 7,206 optometrists in California
Optometrist is Gregory Hayes' primary specialty in the NPI Registry, under taxonomy code 152W00000X. Gregory Hayes is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Gregory Hayes
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
Gregory John Hayes treated 189 Medicare patients in 2024, average age 74
CMS counts 189 Medicare patients who saw Gregory Hayes in 2024. The largest group is 65 to 74, with 100 patients. 67% of them have high cholesterol, and 52% have high blood pressure. Their average risk score is 0.79, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Gregory Hayes' median patient age at 72, with 55% women.
Gregory Hayes' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Gregory Hayes' Medicare patients by sex, 2024
- Women11259%
- Men7741%
Chronic conditions among Gregory Hayes' Medicare patients, 2024
- High cholesterol67%
- High blood pressure52%
- Arthritis40%
- Osteoporosis17%
- Atrial fibrillation14%
- Anxiety13%
- Ischemic heart disease13%
- Cancer12%
Share of Medicare patients with each condition. A patient can have several.
Gregory Hayes' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Gregory John Hayes wrote 116 Medicare Part D claims in 2024
In 2024, Gregory Hayes wrote 116 Medicare Part D claims for 48 patients. 47% of them were for generic drugs.
Gregory Hayes' Part D claims by kind of drug, 2024
- Generic55 claims47%
- Brand-name61 claims53%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Gregory John Hayes takes part in Medicare
Gregory Hayes 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)
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.
Gregory John Hayes received $387 in industry payments in 2025
CMS Open Payments shows 6 general payments to Gregory Hayes from 4 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $241.
Companies that paid Gregory Hayes the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Gregory John Hayes graduated from Southern California College of Optometry
Gregory Hayes graduated from Southern California College of Optometry in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Gregory John Hayes'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)Doctors and Clinicians Utilization Data (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 Gregory John Hayes
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gregory John Hayes' NPI number?
Gregory John Hayes' NPI number is 1598896102. It was assigned on March 7, 2007, and it is active in the NPI Registry.
What does Gregory John Hayes specialize in?
Gregory John Hayes is an optometrist in Mission Viejo, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Gregory John Hayes practice?
Gregory Hayes practices at 27271 Las Ramblas, Mission Viejo, CA 92691. Gregory Hayes' primary practice is Total Vision in Mission Viejo, California. Dmand AI also links Gregory Hayes to 1 group practice or clinic and 1 medical group.
What is Gregory John Hayes' office phone number?
The practice phone on file for Gregory Hayes is (858) 487-5555.
What is Gregory John Hayes' medical license number?
Gregory Hayes holds California license 10952T.
Does Gregory John Hayes accept Medicare?
Yes. CMS lists Gregory Hayes as accepting Medicare assignment.
How many Medicare patients does Gregory John Hayes see?
CMS counts 189 Medicare patients who saw Gregory Hayes in 2024, with an average age of 74.
Where did Gregory John Hayes go to medical school?
Gregory Hayes graduated from Southern California College of Optometry in 1997.
Has Gregory John Hayes received payments from drug or device companies?
CMS Open Payments shows $387 in general payments to Gregory Hayes from 4 companies from 2025 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Gregory John Hayes been practicing?
Gregory Hayes graduated from medical school in 1997, 29 years ago.
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