Jeremy Fields, MD
Gastroenterology Physician · Ames, IA
Jeremy Fields, MD is a gastroenterology physician with a practice address in Ames, Iowa, and NPI 1285844142, issued on May 22, 2007. Check the license (Iowa 37948, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Jeremy Fields
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 37948 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1215 Duff Avenue, Ames, IA 50010
- Phone
- (515) 239-4450
- Enumerated
- May 22, 2007
- Record last updated
- Nov 11, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (515) 956-4080
- Medicare enrollment
- Enrolled (PECOS I20080812000217); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 122 in Iowa → Look up another NPI →
Also registered at 1215 Duff Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Susan Burham, CNMAdvanced Practice Midwife1942254958
- Kristy Calland, DOInternal Medicine Physician1588939631
- Arthur Chen, MDOtolaryngology Physician1598970220
Verify Jeremy Fields in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 37948Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% more Medicare Part D claims than the average gastroenterology physician in 2024
1,504 Medicare Part D claims for 650 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Sod Sulf-Potass Sulf-Mag Sulf400 claims
- Omeprazole271 claims
- Balsalazide Disodium81 claims
- Gavilyte-G81 claims
- Colestipol Hcl71 claims
- Mesalamine63 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $63.67
4 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mcfarland Clinic PCAmes, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jeremy Fields among 122 gastroenterology physician records in Iowa
Jeremy Fields, MD is one of 122 gastroenterology physician records with a practice address in Iowa. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 54% of them.
- NPI issued2007 · 54% of these records are older, 39% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2008 · median 2000 among the 84 with a school on file
- Record last updated2020 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Iowa
There are 122 gastroenterology physician records in Iowa.
All 122 in Iowa → Every provider in Ames → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Bryan Feyen, DOAmes, IA 500101811042310
- Jon Fleming, M.D.Ames, IA 500101285622274
- Larry Johnston, D.O.Ames, IA 500101386036333
- Robert Graveline, M.D.Ames, IA 500141336137306
- Thomas Johnson, M.D.Nevada, IA 502011639168685
- Jon Gibson, M.D.West Des Moines, IA 502661720072507
- Joel Hade, M.D.West Des Moines, IA 502661184618720
- Shawn Hancock, D.O.West Des Moines, IA 502661467410720
Common questions
What is Jeremy Fields, MD's NPI number?
Jeremy Fields, MD's National Provider Identifier (NPI) is 1285844142, issued on May 22, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jeremy Fields, MD located?
The NPPES record lists a practice address at 1215 Duff Avenue, Ames, IA, 50010. Phone: (515) 239-4450. Providers update this record themselves, so call before visiting.
How can I verify Jeremy Fields, MD's license?
NPPES lists Iowa license number 37948, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jeremy Fields, MD prescribe under Medicare Part D?
In 2024, Jeremy Fields, MD had 1,504 Medicare Part D claims for 650 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.