N Engl J Med
Bone ResorptionCalciumCalcium Metabolism Disorders
Dr. Roy A. Kaplan, MD
NPI1558307728
- Publications
- 6
- Industry payments
- $142,166
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 2700 Grant St, Concord, CA 94520-2266
- Practice phone
- Call (925) 952-2888
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Kaplan's professional email, personal email and mobile number
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Dr. Roy A. Kaplan is an internist in Concord, California
Dr. Kaplan practices in Concord, California.
Dr. Kaplan's NPI, 1558307728, was assigned on June 22, 2006. Dr. Kaplan graduated from SUNY Upstate Medical University in 1970. Dr. Kaplan's California license number on file is G30491.
NPI and contact details
- NPI
- 1558307728NPI Registry (opens in a new tab)
- NPI enumeration date
- June 22, 2006
- NPI status
- Active
- Practice phone
- (925) 952-2888
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1970
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Roy A. Kaplan's practice address is in Concord, California
Dr. Kaplan's practice address in the NPI Registry is 2700 Grant St, Concord, CA 94520-2266. The practice phone is (925) 952-2888.
- NPI Registry address2700 Grant St, Concord, CA 94520-2266Phone(925) 952-2888
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Roy A. Kaplan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kaplan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Kaplan's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Roy A. Kaplan is one of 16,751 internists in California
Internal medicine is Dr. Kaplan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Kaplan is board certified in endocrinology, diabetes and metabolism by the American Board of Internal Medicine. Dr. Kaplan has a license on file in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Kaplan
Counts of internists 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. Roy A. Kaplan's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Kaplan's median patient age at 63, with 50% women.
Dr. Kaplan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Roy A. Kaplan has 6 publications on record
Dmand AI links 6 papers to Dr. Kaplan. The most frequent topics are Calcium, Hyperparathyroidism and Cyclic AMP. Dr. Kaplan has published most often in Metabolism.
Papers6
Topics Dr. Kaplan writes about most
- Calcium
- Hyperparathyroidism
- Cyclic AMP
- Parathyroid Hormone
- Phosphates
- Bone and Bones
- Bone Resorption
- Kidney Calculi
Recent publications by Dr. Kaplan
J Clin Endocrinol Metab
Bone and BonesCalciumCyclic AMP
Administration, OralCalciumCation Exchange Resins
Lancet
Bone ResorptionDensitometryElectromagnetic Phenomena
CalciumHydrochlorothiazideKidney Calculi
See who Dr. Kaplan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kaplan works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Roy A. Kaplan received $142,166 in industry payments from 2016 to 2020
CMS Open Payments shows 172 general payments to Dr. Kaplan from 7 drug and device companies from 2016 to 2020. Speaker and faculty fees make up the largest share, 70% of the total. Eli Lilly and Company paid the most, $138,648.
General payments to Dr. Kaplan by program year, 2016 to 2020
General payments to Dr. Kaplan by kind, 2016 to 2020
$142.2Kin total
- Speaker and faculty fees$99,60070%
- Consulting fees$21,00015%
- Travel and lodging$18,12413%
- Food and beverage$3,3322%
- Education$1100%
Companies that paid Dr. Kaplan the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Roy A. Kaplan has 1 award and honors on record
Dmand AI lists 1 award for Dr. Kaplan.
Awards and honors for Dr. Kaplan
- Undated
- AACE Fellow
Source: Dmand AI Professional Profile Data
Dr. Roy A. Kaplan graduated from SUNY Upstate Medical University
Dr. Kaplan graduated from SUNY Upstate Medical University in 1970.
- Medical school
- Board certified in endocrinology, diabetes and metabolism
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Roy A. Kaplan'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 |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 |
| 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. Roy A. Kaplan
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. Roy A. Kaplan's NPI number?
Dr. Roy A. Kaplan's NPI number is 1558307728. It was assigned on June 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Roy A. Kaplan?
Dr. Roy A. Kaplan is an internist in Concord, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Roy A. Kaplan practice?
Dr. Kaplan practices at 2700 Grant St, Concord, CA 94520-2266.
What is Dr. Roy A. Kaplan's office phone number?
The practice phone on file for Dr. Kaplan is (925) 952-2888.
What is Dr. Roy A. Kaplan's medical license number?
Dr. Kaplan's California license number on file is G30491.
Is Dr. Roy A. Kaplan board certified?
Yes. Dr. Kaplan is board certified in endocrinology, diabetes and metabolism by the American Board of Internal Medicine.
Where did Dr. Roy A. Kaplan go to medical school?
Dr. Kaplan graduated from SUNY Upstate Medical University in 1970.
Has Dr. Roy A. Kaplan received payments from drug or device companies?
CMS Open Payments shows $142,166 in general payments to Dr. Kaplan from 7 companies from 2016 to 2020. The largest total came from Eli Lilly and Company.
How long has Dr. Roy A. Kaplan been practicing?
Dr. Kaplan graduated from medical school in 1970, 56 years ago.
Does Dr. Roy A. Kaplan do research?
Dmand AI links 6 publications to Dr. Kaplan.
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