Chad Spangler is a Gastroenterology physician affiliated with Dartmouth–Hitchcock Medical Center. OpenAlex indexes 6 publications with 508 citations (h-index 4).
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
22285 N Pepper Rd
Suite #311
Lake Barrington, IL 600102538
Telephone
847-382-4410Registry record last updated 28 Jun 2011.
Industry payments
34 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Janssen Biotech, Inc.Program year202510 payments
- ABBVIE INC.Program year202512 payments
- Madrigal PharmaceuticalsProgram year20257 payments
Payment records matched to this physician's NPI in CMS Open Payments, program years 2021 onward.
Medicare prescribing footprint (2024)
The drugs this prescriber writes for Medicare patients, grouped by drug class and therapeutic area. Every percentage is a share of their total prescribing, so you can see what they prescribe most. These are proportions, not patient counts or dollar amounts. No condition is inferred: the claims record what was prescribed, never why.
Metabolism & gastrointestinal
92.7%Proton pump inhibitor38.8%Omeprazole59%Pantoprazole Sodium35%Esomeprazole Magnesium6%Part D<11 patientsOsmotic Laxative26.6%Gavilyte-G41%Peg-3350 And Electrolytes39%Gavilyte-C16%Lactulose4%Part D<11 patients+ 10 more classes in this area
Blood & clotting
2.9%Solutions for parenteral nutrition2.9%Peg 3350-Electrolyte100%Part D≥33 patientsRespiratory
2.2%Corticosteroid2.2%Budesonide Dr100%Part D≥11 patients
Drug classes come from the WHO ATC and U.S. National Library of Medicine (RxClass) classifications; prescribing counts come from the CMS Medicare Part D Prescribers file. Each drug is counted once, under its primary class. Medicare fee-for-service only, so no Medicare Advantage, commercial, or pediatric prescribing is included. CMS publishes this data about 17 months after the fact.
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
Similar KOLs
Other experts from the same institution or the same specialty.
Kenneth Meehan, MD
Dartmouth–Hitchcock Medical Center
Thamolwan Surakiatchanukul, MD
Dartmouth–Hitchcock Medical Center
Payam Moein, MD
Dartmouth–Hitchcock Medical Center
Linda Vahdat, MD
Dartmouth–Hitchcock Medical Center
Charles Rice, MD
The Rockefeller University
Edward Loftus, MD
Mayo Clinic Rochester
Naga Chalasani, MD
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Bruce Sands, MD
Icahn School of Medicine at Mount Sinai
A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments, shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”