Contemp Clin Trials Commun
Dr. Leonard H.s. Chuck, MD
NPI1831139385
- Part D claims, 2017
- 12
- Publications
- 3
- Clinical trials
- 1
- Industry payments
- $8,698
- State license
- 1
- Practice address
- 1505 Saint Alphonsus Way, Alamo, CA 94507-1570
- Practice phone
- Call (925) 952-2888
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Chuck'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. Leonard H.s. Chuck is an internist in Alamo, California
Dr. Chuck practices in Alamo, California.
Dr. Chuck's NPI, 1831139385, was assigned on June 6, 2006. Dr. Chuck graduated from University of Calgary Faculty of Medicine in 1983. Dr. Chuck holds California license G54176.
NPI and contact details
- NPI
- 1831139385NPI Registry (opens in a new tab)
- NPI enumeration date
- June 6, 2006
- NPI status
- Active
- Practice phone
- (925) 952-2888
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Leonard H.s. Chuck's practice address is in Alamo, California
Dr. Chuck's practice address in the NPI Registry is 1505 Saint Alphonsus Way, Alamo, CA 94507-1570. The practice phone is (925) 952-2888.
- NPI Registry address1505 Saint Alphonsus Way, Alamo, CA 94507-1570Phone(925) 952-2888
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Leonard H.s. Chuck's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chuck practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Chuck's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Leonard H.s. Chuck is one of 16,751 internists in California
Internal medicine is Dr. Chuck's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chuck is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Chuck
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
16,751internists in California
9internists in Alamo
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Leonard H.s. Chuck wrote 12 Medicare Part D claims in 2017
In 2017, Dr. Chuck wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $90 in total drug cost.
Part D claims, 201712
Drugs named by CMS1
Total drug cost$90
Dr. Chuck's most prescribed drugs by claims, 2017
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Find internists like Dr. Chuck by procedure volume and prescribing
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Dr. Leonard H.s. Chuck has 3 publications on record
Dmand AI links 3 papers to Dr. Chuck in 2023. Dr. Chuck's most frequent co-authors are Charles F. Kivowitz, MD and Candace Tom Saldarini, MD.
Papers3
Dr. Chuck's most frequent co-authors
Recent publications by Dr. Chuck
CardiomegalyElasticityHeart Aneurysm
See who Dr. Chuck researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chuck 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. Leonard H.s. Chuck has worked on 1 clinical trial
Dmand AI links Dr. Chuck to 1 clinical trial. Conditions studied include Diabetes Mellitus, Type 2 and Diabetes Mellitus. Open Payments lists research payments to Dr. Chuck that name 1 trial.
Conditions in Dr. Chuck's trials
- Diabetes Mellitus, Type 2
- Diabetes Mellitus
Investigators on the most trials with Dr. Chuck
- Michael Ryan Adams, MD1 shared trial
- Mohammed A. Allaw, MD1 shared trial
- Madhavi Ampajwala, MD1 shared trial
Recent clinical trials with Dr. Chuck
$17,103 in research paymentsDiabetes Mellitus, Type 2Diabetes MellitusDS-8500a 25mgSitagliptin 100 mg
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Leonard H.s. Chuck received $8,698 in industry payments from 2016 to 2021
CMS Open Payments shows 53 general payments to Dr. Chuck from 9 drug and device companies from 2016 to 2021. Travel and lodging make up the largest share, 69% of the total. Janssen Research & Development, LLC paid the most, $3,676. It also lists 24 research payments totaling $23,869 from 2016 to 2023, naming 1 clinical trial.
General payments to Dr. Chuck by program year, 2016 to 2021
General payments to Dr. Chuck by kind, 2016 to 2021
$8.7Kin total
- Travel and lodging$6,04569%
- Food and beverage$2,60630%
- Education$471%
Companies that paid Dr. Chuck the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Leonard H.s. Chuck graduated from University of Calgary Faculty of Medicine
Dr. Chuck graduated from University of Calgary Faculty of Medicine in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Leonard H.s. Chuck'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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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 Dr. Leonard H.s. Chuck
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. Leonard H.s. Chuck's NPI number?
Dr. Leonard H.s. Chuck's NPI number is 1831139385. It was assigned on June 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Leonard H.s. Chuck?
Dr. Leonard H.s. Chuck is an internist in Alamo, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Leonard H.s. Chuck practice?
Dr. Chuck practices at 1505 Saint Alphonsus Way, Alamo, CA 94507-1570.
What is Dr. Leonard H.s. Chuck's office phone number?
The practice phone on file for Dr. Chuck is (925) 952-2888.
What is Dr. Leonard H.s. Chuck's medical license number?
Dr. Chuck holds California license G54176.
Where did Dr. Leonard H.s. Chuck go to medical school?
Dr. Chuck graduated from University of Calgary Faculty of Medicine in 1983.
What drugs does Dr. Leonard H.s. Chuck prescribe most?
In 2017 Medicare Part D data, Dr. Chuck's most prescribed drugs by claims were Valsartan.
Has Dr. Leonard H.s. Chuck received payments from drug or device companies?
CMS Open Payments shows $8,698 in general payments to Dr. Chuck from 9 companies from 2016 to 2021. The largest total came from Janssen Research & Development, LLC.
How long has Dr. Leonard H.s. Chuck been practicing?
Dr. Chuck graduated from medical school in 1983, 43 years ago.
Does Dr. Leonard H.s. Chuck do research?
Dmand AI links 3 publications to Dr. Chuck. Dr. Chuck has worked on 1 clinical trial.
Who does Dr. Leonard H.s. Chuck publish with?
Dr. Chuck's most frequent co-authors are Charles F. Kivowitz, MD (1 shared paper) and Candace Tom Saldarini, MD (1 shared paper).
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