David G. Preston, M.D.
Internal Medicine Physician · Winslow, ME
David G. Preston, M.D. is an internal medicine physician with a practice address in Winslow, Maine, and NPI 1871559203, issued on Apr 25, 2006. Check the license (Maine 012727, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- David G. Preston
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 012727 ME
Self-reported in NPPES; status is on the state search - Practice location
- 80 Garland RD, Winslow, ME 04901
- Phone
- (207) 873-1098
- Enumerated
- Apr 25, 2006
- Record last updated
- May 5, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (207) 861-5461
- Medicaid ID
- 270150099 ME
- Medicare enrollment
- Enrolled (PECOS I20050524000681); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 1986
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 597 in Maine → Look up another NPI →
Also registered at 80 Garland RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Theresa Jacques, FNP-CNurse Practitioner1881647709
Verify David G. Preston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 012727Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% more Medicare Part D claims than the average internal medicine physician in 2024
6,240 Medicare Part D claims for 832 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 270 claims were for opioids.
Most prescribed
- Omeprazole305 claims
- Levothyroxine Sodium260 claims
- Losartan Potassium254 claims
- Atorvastatin Calcium249 claims
- Rosuvastatin Calcium238 claims
- Lisinopril201 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 79.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Mainegeneral Medical CenterWaterville, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David G. Preston among 597 internal medicine physician records in Maine
David G. Preston, M.D. is one of 597 internal medicine physician records with a practice address in Maine. 77% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 44% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1986 · median 2005 among the 369 with a school on file
- Record last updated2008 · 60% 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 Maine 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 Winslow
They are 1 of the 51 NPPES records with a practice address in Winslow, and 597 internal medicine physician records in Maine.
All 597 in Maine → Every provider in Winslow → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Bert Beverly, M.D.Waterville, ME 049011174689343
- Ramon Cheleuitte, MDWaterville, ME 049011114059672
- Sayeedul Hasan, M.B.B.SWaterville, ME 049011609252394
- John Irwin, D.O.Waterville, ME 049011528092491
- Uzma Naaz, MDWaterville, ME 049011811187487
- Stephen Raph, MDWaterville, ME 049011033175971
- Nadeem Siddiqui, MDWaterville, ME 049011104094879
- Todd Stapley, D.O.Waterville, ME 049011306957428
Common questions
What is David G. Preston, M.D.'s NPI number?
David G. Preston, M.D.'s National Provider Identifier (NPI) is 1871559203, issued on Apr 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David G. Preston, M.D. located?
The NPPES record lists a practice address at 80 Garland RD, Winslow, ME, 04901. Phone: (207) 873-1098. Providers update this record themselves, so call before visiting.
How can I verify David G. Preston, M.D.'s license?
NPPES lists Maine license number 012727, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David G. Preston, M.D. prescribe under Medicare Part D?
In 2024, David G. Preston, M.D. had 6,240 Medicare Part D claims for 832 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is David G. Preston, M.D.'s MIPS final score?
The 2023 MIPS final score is 79.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.