Dr. Alexander Peter Kay, MD
- Medicare services, 2024
- 42
- Medicare patients, 2024
- 26
- Part D claims, 2024
- 2,247
- Hospital affiliations
- 2
- Industry payments
- $350
- Practice address
- 13000 Peyton Dr, Chino Hills, CA 91709
- Practice phone
- Call (619) 442-4122
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Rai - Fletcher Parkway - El Cajon
Chino Hills, California
Find Dr. Kay'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.
Dr. Alexander Peter Kay is a nephrologist in Chino Hills, California
Dr. Kay practices at Rai - Fletcher Parkway - El Cajon in Chino Hills, California.
Dr. Kay's NPI, 1598824187, was assigned on December 8, 2006. Dr. Kay graduated from Oxford University Medical School in 1990. Dr. Kay holds California license A53122.
- NPI
- 1598824187NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264328236
- NPI enumeration date
- December 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (619) 442-4122
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alexander Peter Kay practices at Rai - Fletcher Parkway - El Cajon in Chino Hills, California
Dr. Kay's primary practice is Rai - Fletcher Parkway - El Cajon, at 13000 Peyton Dr, Chino Hills, CA 91709 in San Bernardino County. The practice phone is (619) 442-4122.
- Rai - Fletcher Parkway - El Cajon13000 Peyton Dr, Chino Hills, CA 91709 · San Bernardino CountyPhone(619) 442-4122
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Alexander Peter Kay is affiliated with 4 sites of care and 1 medical group
Dr. Kay's primary practice is Rai - Fletcher Parkway - El Cajon in Chino Hills, California. Dr. Kay is also affiliated with Kaiser Permanente Zion Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Kay to 1 more hospital and 1 dialysis center, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alexander Peter Kay's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kay practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Rai - Fletcher Parkway - El Cajon | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alexander Peter Kay is one of 1,401 nephrologists in California
Nephrology is Dr. Kay's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Kay is board certified in internal medicine by the American Board of Internal Medicine. Dr. Kay is licensed in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Clinical focus
Dmand AI lists chronic kidney disease among the conditions Dr. Kay treats.
Nephrologists near Dr. Kay
Counts of nephrologists 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
Dr. Alexander Peter Kay billed Medicare for 42 services in 2024
CMS data shows 42 Medicare services from Dr. Kay across 1 procedure code in 2024, for 26 Medicare patients. Medicare paid $2,674 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Kay's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 322024: 4231%
Dr. Kay compared with the California median for nephrologists, 2024
- Dr. Kay
- California median
- Medicare services
- 42vs 1,08496% below
- Medicare patients
- 26vs 30792% below
- Part D claims
- 1,973vs 9552.1 times
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Kay's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Kay?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kay and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alexander Peter Kay treated 26 Medicare patients in 2024, average age 67
CMS counts 26 Medicare patients who saw Dr. Kay in 2024. 75% of them have chronic kidney disease, and 75% have diabetes. Their average risk score is 6.67, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Kay's median patient age at 64, with 41% women.
Chronic conditions among Dr. Kay's Medicare patients, 2024
- Chronic kidney disease75%
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Heart failure54%
- Ischemic heart disease42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kay's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women41%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alexander Peter Kay wrote 2,247 Medicare Part D claims in 2024
In 2024, Dr. Kay wrote 2,247 Medicare Part D claims for 293 patients. 96% of them were for generic drugs. CMS names the drug for 1,973 of them, across 33 drugs with 11 or more claims each, at $133,349 in total drug cost. In 2023, CMS named 1,880 claims across 30 drugs.
Dr. Kay's Part D claims by kind of drug, 2024
- Generic2,153 claims96%
- Brand-name and other94 claims4%
Dr. Kay's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Kay's Part D claims, 2024
- Antibiotics2%52 of 2,247 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,8802024: 1,9735%
Drugs named by CMS: 33 in 2024, 30 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Alexander Peter Kay takes part in Medicare
Dr. Kay 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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Dr. Alexander Peter Kay received $350 in industry payments from 2020 to 2025
CMS Open Payments shows 8 general payments to Dr. Kay from 2 drug and device companies from 2020 to 2025. Consulting fees make up the largest share, 50% of the total. Alexion Pharmaceuticals, Inc. paid the most, $325.
General payments to Dr. Kay by program year, 2020 to 2025
General payments to Dr. Kay by kind, 2020 to 2025
- Consulting fees$17550%
- Honoraria$15043%
- Education$257%
Companies that paid Dr. Kay the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Alexander Peter Kay has 1 award and honors on record
Dmand AI lists 1 award for Dr. Kay, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Kay
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Alexander Peter Kay graduated from Oxford University Medical School
Dr. Kay graduated from Oxford University Medical School in 1990.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Alexander Peter Kay accepts plans from 2 insurance carriers
Dr. Kay is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Kay accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Alexander Peter Kay'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 DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 and Drug (CMS) (opens in a new tab)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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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 Dr. Alexander Peter Kay
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Alexander Peter Kay's NPI number?
Dr. Alexander Peter Kay's NPI number is 1598824187. It was assigned on December 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Alexander Peter Kay?
Dr. Alexander Peter Kay is a nephrologist in Chino Hills, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Alexander Peter Kay practice?
Dr. Kay practices at 13000 Peyton Dr, Chino Hills, CA 91709. Dr. Kay's primary practice is Rai - Fletcher Parkway - El Cajon in Chino Hills, California. Dmand AI also links Dr. Kay to 1 hospital and 1 dialysis center.
What is Dr. Alexander Peter Kay's office phone number?
The practice phone on file for Dr. Kay is (619) 442-4122.
What is Dr. Alexander Peter Kay's medical license number?
Dr. Kay holds California license A53122.
Which hospitals is Dr. Alexander Peter Kay affiliated with?
Dr. Kay is affiliated with Kaiser Permanente Zion Medical Center. Dmand AI links Dr. Kay to 1 more hospital.
What medical group is Dr. Alexander Peter Kay part of?
Dr. Kay is linked to Southern California Permanente Medical Group.
Does Dr. Alexander Peter Kay accept Medicare?
Yes. CMS data shows Dr. Kay billed Medicare for 42 services in 2024, and Dr. Kay accepts Medicare assignment.
How many Medicare patients does Dr. Alexander Peter Kay see?
CMS counts 26 Medicare patients who saw Dr. Kay in 2024, with an average age of 67.
Is Dr. Alexander Peter Kay board certified?
Yes. Dr. Kay is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Alexander Peter Kay bill to Medicare?
In 2024, Dr. Kay's most billed Medicare services were hospital inpatient care (99232).
Where did Dr. Alexander Peter Kay go to medical school?
Dr. Kay graduated from Oxford University Medical School in 1990.
What drugs does Dr. Alexander Peter Kay prescribe most?
In 2024 Medicare Part D data, Dr. Kay's most prescribed drugs by claims were Furosemide, Calcitriol and Losartan Potassium.
Has Dr. Alexander Peter Kay received payments from drug or device companies?
CMS Open Payments shows $350 in general payments to Dr. Kay from 2 companies from 2020 to 2025. The largest total came from Alexion Pharmaceuticals, Inc.
How long has Dr. Alexander Peter Kay been practicing?
Dr. Kay graduated from medical school in 1990, 36 years ago.
What insurance does Dr. Alexander Peter Kay accept?
Dr. Kay is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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