Catherine R. Fredricks-Rehagen, DO
Internal Medicine Physician · Bath, ME
Catherine R. Fredricks-Rehagen, DO is an internal medicine physician with a practice address in Bath, Maine, and NPI 1821257650, issued on Jun 6, 2008. Check the license (Maine 2231, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Catherine R. Fredricks-Rehagen
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2231 ME
Self-reported in NPPES; status is on the state search - Practice location
- 108 Centre St, Bath, ME 04530
- Phone
- (207) 386-1800
- Enumerated
- Jun 6, 2008
- Record last updated
- Feb 5, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (207) 386-1801
- Medicare enrollment
- Enrolled (PECOS I20120117000845); accepts Medicare assignment
- Medical or professional school
- University Of New England, College Of Osteo Medicine, 2008
- 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 108 Centre St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Cody Eaton, PACPhysician Assistant1487326104
- Amy Etzweiler, MDInternal Medicine Physician1568469401
- Alexander FiorentinoInternal Medicine Physician1093246522
- Scott French, MDInternal Medicine Physician1578564357
Verify Catherine R. Fredricks-Rehagen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 2231Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average internal medicine physician in 2024
7,390 Medicare Part D claims for 651 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 238 claims were for opioids.
Most prescribed
- Atorvastatin Calcium567 claims
- Levothyroxine Sodium449 claims
- Lisinopril320 claims
- Losartan Potassium259 claims
- Omeprazole224 claims
- Hydrochlorothiazide218 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
- MainehealthPortland, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catherine R. Fredricks-Rehagen among 597 internal medicine physician records in Maine
Catherine R. Fredricks-Rehagen, DO 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 2008, is newer than 61% of them.
- NPI issued2008 · 61% of these records are older, 35% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2008 · median 2005 among the 369 with a school on file
- Record last updated2016 · 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).
15 internal medicine physician records list a practice address in Bath
They are 15 of the 184 NPPES records with a practice address in Bath, and 597 internal medicine physician records in Maine.
All 597 in Maine → Every provider in Bath → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Margaret Duhamel, MDBath, ME 045301215112230
- Amy Etzweiler, MDBath, ME 045301568469401
- Alexander FiorentinoBath, ME 045301093246522
- Scott French, MDBath, ME 045301578564357
- Matthew Hanna, MDBath, ME 045301932133386
- Nancy Hasenfus, MDBath, ME 045301811927825
- Benjamin Herman, MDBath, ME 045301447284708
- Christina Kapala, D.O.Bath, ME 045301386080182
Common questions
What is Catherine R. Fredricks-Rehagen, DO's NPI number?
Catherine R. Fredricks-Rehagen, DO's National Provider Identifier (NPI) is 1821257650, issued on Jun 6, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Catherine R. Fredricks-Rehagen, DO located?
The NPPES record lists a practice address at 108 Centre St, Bath, ME, 04530. Phone: (207) 386-1800. Providers update this record themselves, so call before visiting.
How can I verify Catherine R. Fredricks-Rehagen, DO's license?
NPPES lists Maine license number 2231, 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 Catherine R. Fredricks-Rehagen, DO prescribe under Medicare Part D?
In 2024, Catherine R. Fredricks-Rehagen, DO had 7,390 Medicare Part D claims for 651 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.