Robert F. Sigworth, M.D.
Internal Medicine Physician · Traverse City, MI
Robert F. Sigworth, M.D. is an internal medicine physician with a practice address in Traverse City, Michigan, and NPI 1336144740, issued on Jun 14, 2005. Check the license (Michigan 4301081164, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Robert F. Sigworth
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301081164 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1105 6TH St, Traverse City, MI 49684
- Phone
- (231) 947-0673
- Enumerated
- Jun 14, 2005
- Record last updated
- Sep 14, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (801) 740-2847
- Medicaid ID
- 4485536 MI
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 1105 6TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Asante Acheampong, PHARMDPharmacist1063152353
- Troy Ahlstrom, M.D.Internal Medicine Physician1548265911
- Sally Ancel, D.O.Emergency Medicine Physician1811000466
- Kyrsten Austin, MS, RDRegistered Dietitian1609649037
- Janet Baillod, MSN, NPNurse Practitioner1063586352
- Brooke Baker, DPTPhysical Therapist1992274021
Verify Robert F. Sigworth in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301081164Check 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
37 Medicare Part D claims for 25 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.
Robert F. Sigworth among 5,735 internal medicine physician records in Michigan
Robert F. Sigworth, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2007 · 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).
93 internal medicine physician records list a practice address in Traverse City
They are 93 of the 3,536 NPPES records with a practice address in Traverse City, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Traverse City → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Troy Ahlstrom, M.D.Traverse City, MI 496841548265911
- Natalie Brown, M.D., PHDTraverse City, MI 496841427053529
- Elizabeth Elliot, D.O.Traverse City, MI 496841013919109
- David Friar, M.D.Traverse City, MI 496841720083108
- Kenneth Friar, M.D.Traverse City, MI 496841730184847
- William Howard, MDTraverse City, MI 496841588669725
- David Macdougall, MDTraverse City, MI 496841659376416
- Michael Salata, M.D.Traverse City, MI 496841275538670
Common questions
What is Robert F. Sigworth, M.D.'s NPI number?
Robert F. Sigworth, M.D.'s National Provider Identifier (NPI) is 1336144740, issued on Jun 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert F. Sigworth, M.D. located?
The NPPES record lists a practice address at 1105 6TH St, Traverse City, MI, 49684. Phone: (231) 947-0673. Providers update this record themselves, so call before visiting.
How can I verify Robert F. Sigworth, M.D.'s license?
NPPES lists Michigan license number 4301081164, 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 Robert F. Sigworth, M.D. prescribe under Medicare Part D?
In 2024, Robert F. Sigworth, M.D. had 37 Medicare Part D claims for 25 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.