Gregory Lambourne, M.D.
Internal Medicine Physician · Lake City, MI
Gregory Lambourne, M.D. is an internal medicine physician with a practice address in Lake City, Michigan, and NPI 1598775850, issued on Aug 9, 2006. Check the license (Michigan 4301036909, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Gregory Lambourne
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301036909 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1866 S Morey RD, Lake City, MI 49651
- Phone
- (231) 775-4841
- Enumerated
- Aug 9, 2006
- Record last updated
- Sep 26, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (231) 839-7222
- Medicaid ID
- 2092861-10 MI
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 1866 S Morey RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christopher Donzell, FNP-BCFamily Nurse Practitioner1780932137
- Elizabeth Tuck, FNP-CPrimary Care Nurse Practitioner1609361807
Verify Gregory Lambourne in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301036909Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
275 Medicare Part D claims for 78 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 14 claims were for opioids.
Most prescribed
- Tamsulosin Hcl24 claims
- Levothyroxine Sodium16 claims
- Spironolactone12 claims
- Bumetanide11 claims
- Duloxetine Hcl11 claims
- Eliquis11 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.
Gregory Lambourne among 5,735 internal medicine physician records in Michigan
Gregory Lambourne, 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 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 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).
1 internal medicine physician record lists a practice address in Lake City
They are 1 of the 60 NPPES records with a practice address in Lake City, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Lake City → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ryan Sullivan, MDManistee, MI 496601174605653
- Charles Vandenberg, D.O.Manistee, MI 496601750638516
- William Weiner, MDManistee, MI 496601598782443
- Christopher Wilhelm, MDHonor, MI 496401568460699
- Mark Kuiper, MDFrankfort, MI 496351689781262
- Osman Ahmedfiqi, M.DReed City, MI 496771790983443
- Priyanka Hirlekar, MDReed City, MI 496771740695345
- Mhd Nawras Kordi, MDReed City, MI 496771669620373
Common questions
What is Gregory Lambourne, M.D.'s NPI number?
Gregory Lambourne, M.D.'s National Provider Identifier (NPI) is 1598775850, issued on Aug 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Lambourne, M.D. located?
The NPPES record lists a practice address at 1866 S Morey RD, Lake City, MI, 49651. Phone: (231) 775-4841. Providers update this record themselves, so call before visiting.
How can I verify Gregory Lambourne, M.D.'s license?
NPPES lists Michigan license number 4301036909, 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 Gregory Lambourne, M.D. prescribe under Medicare Part D?
In 2024, Gregory Lambourne, M.D. had 275 Medicare Part D claims for 78 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.