Sharon L. Siefert, M.D
Family Medicine Physician · Sparta, MI
Sharon L. Siefert, M.D is a family medicine physician with a practice address in Sparta, Michigan, and NPI 1598769242, issued on Jun 10, 2005. Check the license (Michigan 4301050686, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Sharon L. Siefert
- Credential
- M.D
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 4301050686 MI
Self-reported in NPPES; status is on the state search - Practice location
- 2111 12 Mile RD NW, Sparta, MI 49345
- Phone
- (616) 391-8470
- Enumerated
- Jun 10, 2005
- Record last updated
- Feb 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (616) 391-8495
- Medicaid ID
- 4198672 MI
- Medicare enrollment
- Enrolled (PECOS I20100115000678); accepts Medicare assignment
- Medical or professional school
- Northeastern Ohio University College Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,013 in Michigan → Look up another NPI →
Also registered at 2111 12 Mile RD NW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Armstrong, DOFamily Medicine Physician1932104882
- Christopher Bell, FNP-CFamily Nurse Practitioner1255063012
- Beverly Bond, NPNurse Practitioner1750537924
- David Bouwkamp, PA-CPhysician Assistant1982689733
- Gianina Corpus, MDFamily Medicine Physician1679987812
- Heather Duthler, LMSW, CAADC, CCSSocial Worker1538551346
Verify Sharon L. Siefert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301050686Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% more Medicare Part D claims than the average family medicine physician in 2024
5,632 Medicare Part D claims for 495 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 197 claims were for opioids.
Most prescribed
- Levothyroxine Sodium286 claims
- Omeprazole270 claims
- Amlodipine Besylate264 claims
- Atorvastatin Calcium251 claims
- Lisinopril251 claims
- Metoprolol Succinate181 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: $81.71
4 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.
Bills Medicare through one group practice
- Spectrum Health Primary Care PartnersSparta, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sharon L. Siefert among 6,013 family medicine physician records in Michigan
Sharon L. Siefert, M.D is one of 6,013 family medicine physician records with a practice address in Michigan. 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, 89% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1985 · median 2008 among the 3,493 with a school on file
- Record last updated2021 · 58% 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 Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 family medicine physician records list a practice address in Sparta
They are 13 of the 90 NPPES records with a practice address in Sparta, and 6,013 family medicine physician records in Michigan.
All 6,013 in Michigan → Every provider in Sparta → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Mark Armstrong, DOSparta, MI 493451932104882
- Gianina Corpus, MDSparta, MI 493451679987812
- Barry Kitts, DOSparta, MI 493451508860941
- Heather McGovern, M.D.Sparta, MI 493451902246085
- Adam McMillan, MDSparta, MI 493451336778083
- James Ranta, DO, M.S.Sparta, MI 493451841294592
- John Schneider, MDSparta, MI 493451588689210
- Matthew Schram, D.O.Sparta, MI 493451467681544
Common questions
What is Sharon L. Siefert, M.D's NPI number?
Sharon L. Siefert, M.D's National Provider Identifier (NPI) is 1598769242, issued on Jun 10, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Sharon L. Siefert, M.D located?
The NPPES record lists a practice address at 2111 12 Mile RD NW, Sparta, MI, 49345. Phone: (616) 391-8470. Providers update this record themselves, so call before visiting.
How can I verify Sharon L. Siefert, M.D's license?
NPPES lists Michigan license number 4301050686, 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 Sharon L. Siefert, M.D prescribe under Medicare Part D?
In 2024, Sharon L. Siefert, M.D had 5,632 Medicare Part D claims for 495 beneficiaries; 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.