Gregory Jon Simpson, OD
- Medicare patients, 2024
- 483
- Part D claims, 2024
- 1,318
- MIPS score, 2024
- 88
- Industry payments
- $20
- Affiliated sites
- 1
- Practice address
- 2150 Harrisburg Pike, Lancaster, PA 17604
- Practice phone
- Call (717) 735-3993
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Physicians' Surgery Center, Lancaster General Health
Surgery Center - Medicare-Certified · Lancaster, Pennsylvania
Find Gregory Simpson'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.
Gregory Jon Simpson is an optometrist in Bullhead City, Arizona
Gregory Simpson practices at Physicians' Surgery Center, Lancaster General Health in Lancaster, Pennsylvania.
Gregory Simpson's NPI, 1912922378, was assigned on July 13, 2006. Gregory Simpson graduated from Illinois College of Optometry at Chicago in 2005. Gregory Simpson holds Arizona license 1542.
- NPI
- 1912922378NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981609609
- NPI enumeration date
- July 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (717) 735-3993
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gregory Jon Simpson practices in Lancaster and Bullhead City
Gregory Simpson's primary practice is Physicians' Surgery Center, Lancaster General Health, at 2150 Harrisburg Pike, Lancaster, PA 17604. The practice phone is (717) 735-3993. Gregory Simpson also practices at Physicians Surgery Center, 1800 S Arizona State 95, Bullhead City, AZ 86442.
- Physicians' Surgery Center, Lancaster General HealthPrimary2150 Harrisburg Pike, Lancaster, PA 17604Phone(717) 735-3993
- Physicians Surgery Center1800 S Arizona State 95, Bullhead City, AZ 86442 · Mohave CountyPhone(928) 763-8443
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Gregory Jon Simpson is affiliated with 1 site of care and 1 medical group
Gregory Simpson's primary practice is Physicians' Surgery Center, Lancaster General Health in Lancaster, Pennsylvania. Dmand AI also links Gregory Simpson to 1 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 Gregory Jon Simpson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gregory Simpson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Physicians' Surgery Center, Lancaster General Health | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Gregory Jon Simpson is one of 958 optometrists in Arizona
Optometrist is Gregory Simpson's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Gregory Simpson is licensed in Arizona.
Specialties and state licenses
- Optometrist, ArizonaPrimary
Optometrists near Gregory Simpson
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 Jon Simpson treated 483 Medicare patients in 2024, average age 75
CMS counts 483 Medicare patients who saw Gregory Simpson in 2024. The largest group is 75 to 84, with 207 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 1.21, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Gregory Simpson's median patient age at 74, with 54% women.
Gregory Simpson's Medicare patients by age, 2024
Gregory Simpson's Medicare patients by sex, 2024
- Women26755%
- Men21645%
Chronic conditions among Gregory Simpson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis45%
- Diabetes43%
- Chronic kidney disease28%
- Ischemic heart disease25%
- Mood disorders22%
- COPD21%
Share of Medicare patients with each condition. A patient can have several.
Gregory Simpson'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
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Gregory Jon Simpson wrote 1,318 Medicare Part D claims in 2024
In 2024, Gregory Simpson wrote 1,318 Medicare Part D claims for 397 patients. 58% of them were for generic drugs.
Gregory Simpson's Part D claims by kind of drug, 2024
- Generic766 claims58%
- Brand-name552 claims42%
Drug classes CMS tracks in Gregory Simpson's Part D claims, 2024
- Antibiotics2%32 of 1,318 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
Gregory Jon Simpson scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Gregory Simpson for performance year 2024, reported as part of a group. Gregory Simpson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Gregory Simpson's MIPS scores, performance year 2024
- 88of 100Final score
- 77.6of 100Quality
- 40of 100Improvement Activities
- 90of 100Cost
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
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Gregory Jon Simpson received $20 in industry payments in 2025
CMS Open Payments shows 1 general payment to Gregory Simpson from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Coloplast Corp paid the most, $20.
Companies that paid Gregory Simpson 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 Jon Simpson graduated from Illinois College of Optometry at Chicago
Gregory Simpson graduated from Illinois College of Optometry at Chicago in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Gregory Jon Simpson'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 Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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)Clinician Public Reporting: Overall MIPS Performance (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 Jon Simpson
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 Jon Simpson's NPI number?
Gregory Jon Simpson's NPI number is 1912922378. It was assigned on July 13, 2006, and it is active in the NPI Registry.
What does Gregory Jon Simpson specialize in?
Gregory Jon Simpson is an optometrist in Bullhead City, Arizona. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Gregory Jon Simpson practice?
Gregory Simpson practices at 2150 Harrisburg Pike, Lancaster, PA 17604. Gregory Simpson also practices at 1800 S Arizona State 95, Bullhead City, AZ 86442. Gregory Simpson's primary practice is Physicians' Surgery Center, Lancaster General Health in Lancaster, Pennsylvania. Dmand AI also links Gregory Simpson to 1 medical group.
What is Gregory Jon Simpson's office phone number?
The practice phone on file for Gregory Simpson is (717) 735-3993.
What is Gregory Jon Simpson's medical license number?
Gregory Simpson holds Arizona license 1542.
Does Gregory Jon Simpson accept Medicare?
Yes. CMS lists Gregory Simpson as accepting Medicare assignment.
What is Gregory Jon Simpson's MIPS score?
Gregory Simpson's MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
How many Medicare patients does Gregory Jon Simpson see?
CMS counts 483 Medicare patients who saw Gregory Simpson in 2024, with an average age of 75.
Where did Gregory Jon Simpson go to medical school?
Gregory Simpson graduated from Illinois College of Optometry at Chicago in 2005.
Has Gregory Jon Simpson received payments from drug or device companies?
CMS Open Payments shows $20 in general payments to Gregory Simpson from 1 company from 2025 to 2025. The largest total came from Coloplast Corp.
How long has Gregory Jon Simpson been practicing?
Gregory Simpson graduated from medical school in 2005, 21 years ago.
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