Kathryn Rensenbrink, MD
Internal Medicine Physician · Ellsworth, ME
Kathryn Rensenbrink, MD is an internal medicine physician with a practice address in Ellsworth, Maine, and NPI 1124067194, issued on Jun 5, 2006. Check the license (Maine MD13915, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Kathryn Rensenbrink
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD13915 ME
Self-reported in NPPES; status is on the state search - Practice location
- 32 Resort Way, Ellsworth, ME 04605
- Phone
- (207) 664-7780
- Enumerated
- Jun 5, 2006
- Record last updated
- Jan 20, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (207) 664-7723
- Medicaid ID
- 1124067194 ME
- Medicare enrollment
- Enrolled (PECOS I20050818000612); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1992
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 597 in Maine → Look up another NPI →
Also registered at 32 Resort Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lisa Allen, PA-CPhysician Assistant1851543698
- Breanne Bisset, NPGerontology Nurse Practitioner1104502012
- Ja'Nette Bowden, FNP-CFamily Nurse Practitioner1720656549
- Elizabeth Byard, RNC FNPFamily Nurse Practitioner1821112236
- James Grossman, PACPhysician Assistant1255340790
- Deidra HeierFamily Nurse Practitioner1720786064
Verify Kathryn Rensenbrink in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license MD13915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% more Medicare Part D claims than the average internal medicine physician in 2024
6,121 Medicare Part D claims for 467 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 146 claims were for opioids.
Most prescribed
- Atorvastatin Calcium403 claims
- Levothyroxine Sodium303 claims
- Lisinopril262 claims
- Amlodipine Besylate210 claims
- Eliquis185 claims
- Metoprolol Succinate162 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.
Bills Medicare through one group practice
- Maine Coast Regional Health FacilitiesEllsworth, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kathryn Rensenbrink among 597 internal medicine physician records in Maine
Kathryn Rensenbrink, MD 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
- Graduated1992 · median 2005 among the 369 with a school on file
- Record last updated2021 · 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).
10 internal medicine physician records list a practice address in Ellsworth
They are 10 of the 453 NPPES records with a practice address in Ellsworth, and 597 internal medicine physician records in Maine.
All 597 in Maine → Every provider in Ellsworth → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Charles Alexander, MDEllsworth, ME 046051841230588
- Mercedes Ang, M.D.Ellsworth, ME 046051033341813
- Anita Kolisch, MDEllsworth, ME 046051447283981
- Elizabeth Laverack, M. D.Ellsworth, ME 046051053391300
- Laura Marlowe-Flanagan, D.O.Ellsworth, ME 046051790037620
- Stephen Nightingale, M.D.Ellsworth, ME 046051538140520
- Peter Ossanna, MDEllsworth, ME 046051942249842
- Petr Smejkal, MDEllsworth, ME 046051922028976
Common questions
What is Kathryn Rensenbrink, MD's NPI number?
Kathryn Rensenbrink, MD's National Provider Identifier (NPI) is 1124067194, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kathryn Rensenbrink, MD located?
The NPPES record lists a practice address at 32 Resort Way, Ellsworth, ME, 04605. Phone: (207) 664-7780. Providers update this record themselves, so call before visiting.
How can I verify Kathryn Rensenbrink, MD's license?
NPPES lists Maine license number MD13915, 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 Kathryn Rensenbrink, MD prescribe under Medicare Part D?
In 2024, Kathryn Rensenbrink, MD had 6,121 Medicare Part D claims for 467 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.