James Nelson Demuth, MD
Internal Medicine Physician · Lansing, MI
James Nelson Demuth, MD is an internal medicine physician with a practice address in Lansing, Michigan, and NPI 1568568665, issued on Sep 15, 2006. Check the license (Michigan 4301076699, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- James Nelson Demuth
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301076699 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1200 E Michigan Ave, Lansing, MI 48912
- Phone
- (517) 364-5880
- Enumerated
- Sep 15, 2006
- Record last updated
- Feb 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (517) 364-5887
- Medicaid ID
- 4609393 MI
- Medicare enrollment
- Enrolled (PECOS I20040322001552); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 2000
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 1200 E Michigan Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James Nelson Demuth in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301076699Check 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 internal medicine physician in 2024
35 Medicare Part D claims for 16 beneficiaries, against an average of 3,176 among the 108,855 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.
Bills Medicare through one group practice
- Edward W Sparrow Hospital AssociationLansing, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Nelson Demuth among 5,735 internal medicine physician records in Michigan
James Nelson Demuth, MD is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2000 · median 2006 among the 3,564 with a school on file
- Record last updated2021 · 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 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
135 internal medicine physician records list a practice address in Lansing
They are 135 of the 5,276 NPPES records with a practice address in Lansing, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Lansing → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shahzaman Abbasi, MDLansing, MI 489121376512111
- Ovidiu Batca, MDLansing, MI 489121093761967
- Cynthia Boynton, M.D.Lansing, MI 489121013969930
- James Fletcher, MD, DPMLansing, MI 489121346214467
- Habtamu Handro, M.D.Lansing, MI 489121558316000
- Fred Isaacs, M.D.Lansing, MI 489121487609665
- Carol Lyon, M.D.Lansing, MI 489121982659090
- Harry McCoy, M.D.Lansing, MI 489121003850702
Common questions
What is James Nelson Demuth, MD's NPI number?
James Nelson Demuth, MD's National Provider Identifier (NPI) is 1568568665, issued on Sep 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Nelson Demuth, MD located?
The NPPES record lists a practice address at 1200 E Michigan Ave, Lansing, MI, 48912. Phone: (517) 364-5880. Providers update this record themselves, so call before visiting.
How can I verify James Nelson Demuth, MD's license?
NPPES lists Michigan license number 4301076699, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Nelson Demuth, MD prescribe under Medicare Part D?
In 2024, James Nelson Demuth, MD had 35 Medicare Part D claims for 16 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.