Charles J. Cathcart, MD
Internal Medicine Physician · Portland, ME
Charles J. Cathcart, MD is an internal medicine physician with a practice address in Portland, Maine, and NPI 1861461535, issued on Mar 16, 2006. Check the license (Maine 012327, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Charles J. Cathcart
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 012327 ME
Self-reported in NPPES; status is on the state search - Practice location
- 84 Marginal Way, Portland, ME 04101
- Phone
- (207) 774-5816
- Enumerated
- Mar 16, 2006
- Record last updated
- Jul 19, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (207) 523-8597
- Medicaid ID
- 269160099 ME
- Medicare enrollment
- Enrolled (PECOS I20080822000441); may accept Medicare assignment
- Medical or professional school
- University Of Vermont College Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 597 in Maine → Look up another NPI →
Also registered at 84 Marginal Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Charles J. Cathcart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 012327Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average internal medicine physician in 2024
4,258 Medicare Part D claims for 511 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. 14 claims were for opioids.
Most prescribed
- Losartan Potassium330 claims
- Simvastatin316 claims
- Lisinopril289 claims
- Atorvastatin Calcium254 claims
- Amlodipine Besylate215 claims
- Levothyroxine Sodium142 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.
Charles J. Cathcart among 597 internal medicine physician records in Maine
Charles J. Cathcart, 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
- Graduated1984 · median 2005 among the 369 with a school on file
- Record last updated2011 · 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).
145 internal medicine physician records list a practice address in Portland
They are 145 of the 6,022 NPPES records with a practice address in Portland, and 597 internal medicine physician records in Maine.
All 597 in Maine → Every provider in Portland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Joel Botler, MDPortland, ME 041011891764577
- Wendy Cathcart, MDPortland, ME 041011295704971
- Thomas Claffey, MDPortland, ME 041011487623153
- Steven Dobieski, MDPortland, ME 041011942279617
- John Erickson, MDPortland, ME 041011043289713
- Debra Fuchs Ertman, MDPortland, ME 041011730158403
- Phyllidia Ku-Ruth, MDPortland, ME 041011497724108
- Lisa Letourneau, MDPortland, ME 041011982677076
Common questions
What is Charles J. Cathcart, MD's NPI number?
Charles J. Cathcart, MD's National Provider Identifier (NPI) is 1861461535, issued on Mar 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Charles J. Cathcart, MD located?
The NPPES record lists a practice address at 84 Marginal Way, Portland, ME, 04101. Phone: (207) 774-5816. Providers update this record themselves, so call before visiting.
How can I verify Charles J. Cathcart, MD's license?
NPPES lists Maine license number 012327, 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 Charles J. Cathcart, MD prescribe under Medicare Part D?
In 2024, Charles J. Cathcart, MD had 4,258 Medicare Part D claims for 511 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.