James David Demmel, M.D.
Family Medicine Physician · Marshalltown, IA
James David Demmel, M.D. is a family medicine physician with a practice address in Marshalltown, Iowa, and NPI 1811985559, issued on Oct 6, 2005. Check the license (Iowa 27203, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- James David Demmel
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 27203 IA
Self-reported in NPPES; status is on the state search - Practice location
- 312 E Main St, Marshalltown, IA 50158
- Phone
- (641) 752-5469
- Enumerated
- Oct 6, 2005
- Record last updated
- Jul 20, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (641) 844-2205
- Medicaid IDs
- 1058966 IA
1811985559 IA - Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,336 in Iowa → Look up another NPI →
Also registered at 312 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James David Demmel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 27203Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
52 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
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: $37.56
2 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 55,478 providers of this specialty with any payment received $902.55 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.
James David Demmel among 2,336 family medicine physician records in Iowa
James David Demmel, M.D. is one of 2,336 family medicine physician records with a practice address in Iowa. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2012 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 family medicine physician records list a practice address in Marshalltown
They are 18 of the 443 NPPES records with a practice address in Marshalltown, and 2,336 family medicine physician records in Iowa.
All 2,336 in Iowa → Every provider in Marshalltown → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Lynne Desotel, MDMarshalltown, IA 501581568545960
- Patricia Fasbender, D.O.Marshalltown, IA 501581700847787
- Ross Huffman, DOMarshalltown, IA 501581871582973
- Darrell Jebsen, M.D.Marshalltown, IA 501581619966785
- Christine Jensen, MDMarshalltown, IA 501581720050297
- Laura Lasack, MDMarshalltown, IA 501581861468084
- Michael Miriovsky, MDMarshalltown, IA 501581669462099
- Maria Olberding, M.D.Marshalltown, IA 501581003807900
Common questions
What is James David Demmel, M.D.'s NPI number?
James David Demmel, M.D.'s National Provider Identifier (NPI) is 1811985559, issued on Oct 6, 2005. An NPI identifies a provider in billing; it is not a license.
Where is James David Demmel, M.D. located?
The NPPES record lists a practice address at 312 E Main St, Marshalltown, IA, 50158. Phone: (641) 752-5469. Providers update this record themselves, so call before visiting.
How can I verify James David Demmel, M.D.'s license?
NPPES lists Iowa license number 27203, 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 James David Demmel, M.D. prescribe under Medicare Part D?
In 2024, James David Demmel, M.D. had 52 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.