Lewis E. Kemmerer, OD
- Medicare patients, 2024
- 288
- Part D claims, 2024
- 1,466
- Affiliated sites
- 2
- Medical groups
- 2
- State license
- 1
- Practice address
- 6109 W Ramsey St, Banning, CA 92220
- Practice phone
- Call (909) 793-3311
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Optum Redlands Fern Cajon Primary and Specialty Care
Banning, California
Find Lewis Kemmerer'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.
Lewis E. Kemmerer is an optometrist in Banning, California
Lewis Kemmerer practices at Optum Redlands Fern Cajon Primary and Specialty Care in Banning, California.
Lewis Kemmerer's NPI, 1942242912, was assigned on June 12, 2006. Lewis Kemmerer graduated from Southern California College of Optometry in 1987. Lewis Kemmerer holds California license OPT 8757.
- NPI
- 1942242912NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7416083027
- NPI enumeration date
- June 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 793-3311
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Lewis E. Kemmerer practices at Optum Redlands Fern Cajon Primary and Specialty Care in Banning, California
Lewis Kemmerer's primary practice is Optum Redlands Fern Cajon Primary and Specialty Care, at 6109 W Ramsey St, Banning, CA 92220 in Riverside County. The practice phone is (909) 793-3311.
- Optum Redlands Fern Cajon Primary and Specialty Care6109 W Ramsey St, Banning, CA 92220 · Riverside CountyPhone(909) 793-3311
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Lewis E. Kemmerer is affiliated with 3 sites of care and 2 medical groups
Lewis Kemmerer's primary practice is Optum Redlands Fern Cajon Primary and Specialty Care in Banning, California. The medical group on file is Optum - Downtown Los Angeles. Dmand AI also links Lewis Kemmerer to 2 more group practices and clinics 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 Lewis E. Kemmerer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Lewis Kemmerer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Optum Redlands Fern Cajon Primary and Specialty Care | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Lewis E. Kemmerer is one of 7,206 optometrists in California
Optometrist is Lewis Kemmerer's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Lewis Kemmerer is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Lewis Kemmerer
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
Lewis E. Kemmerer treated 288 Medicare patients in 2024, average age 76
CMS counts 288 Medicare patients who saw Lewis Kemmerer in 2024. The largest group is 75 to 84, with 122 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 11% are also on Medicaid. Their average risk score is 1.08, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Lewis Kemmerer's median patient age at 73, with 59% women.
Lewis Kemmerer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Lewis Kemmerer's Medicare patients by sex, 2024
- Women18464%
- Men10436%
Chronic conditions among Lewis Kemmerer's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Diabetes42%
- Arthritis38%
- Chronic kidney disease34%
- Mood disorders17%
- Depression16%
- Heart failure16%
Share of Medicare patients with each condition. A patient can have several.
Lewis Kemmerer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women59%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Lewis E. Kemmerer wrote 1,466 Medicare Part D claims in 2024
In 2024, Lewis Kemmerer wrote 1,466 Medicare Part D claims for 296 patients. 77% of them were for generic drugs.
Lewis Kemmerer's Part D claims by kind of drug, 2024
- Generic1,132 claims77%
- Brand-name334 claims23%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Lewis E. Kemmerer takes part in Medicare
Lewis Kemmerer 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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Lewis E. Kemmerer graduated from Southern California College of Optometry
Lewis Kemmerer graduated from Southern California College of Optometry in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Lewis E. Kemmerer'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) |
| 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 Lewis E. Kemmerer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Lewis E. Kemmerer's NPI number?
Lewis E. Kemmerer's NPI number is 1942242912. It was assigned on June 12, 2006, and it is active in the NPI Registry.
What does Lewis E. Kemmerer specialize in?
Lewis E. Kemmerer is an optometrist in Banning, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Lewis E. Kemmerer practice?
Lewis Kemmerer practices at 6109 W Ramsey St, Banning, CA 92220. Lewis Kemmerer's primary practice is Optum Redlands Fern Cajon Primary and Specialty Care in Banning, California. Dmand AI also links Lewis Kemmerer to 2 group practices and clinics and 1 medical group.
What is Lewis E. Kemmerer's office phone number?
The practice phone on file for Lewis Kemmerer is (909) 793-3311.
What is Lewis E. Kemmerer's medical license number?
Lewis Kemmerer holds California license OPT 8757.
What medical group is Lewis E. Kemmerer part of?
Lewis Kemmerer is linked to Optum - Downtown Los Angeles. Dmand AI links Lewis Kemmerer to 1 more medical group.
Does Lewis E. Kemmerer accept Medicare?
Yes. CMS lists Lewis Kemmerer as accepting Medicare assignment.
How many Medicare patients does Lewis E. Kemmerer see?
CMS counts 288 Medicare patients who saw Lewis Kemmerer in 2024, with an average age of 76.
Where did Lewis E. Kemmerer go to medical school?
Lewis Kemmerer graduated from Southern California College of Optometry in 1987.
How long has Lewis E. Kemmerer been practicing?
Lewis Kemmerer graduated from medical school in 1987, 39 years ago.
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