Katherine H. Marks, MD
Hospitalist Physician · Portland, ME
Katherine H. Marks, MD is a hospitalist physician with a practice address in Portland, Maine, and NPI 1215564695, issued on Mar 25, 2020. Check the license on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Katherine H. Marks
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 152259 MA
Self-reported in NPPES; status is on the state search - Practice location
- 22 Bramhall St, Portland, ME 04102
- Phone
- (207) 662-0111
- Enumerated
- Mar 25, 2020
- Record last updated
- Jan 22, 2025
- Medicare enrollment
- Enrolled (PECOS I20230901000580); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2020
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 245 in Maine → Look up another NPI →
Also registered at 22 Bramhall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine H. Marks in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in MedicineCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average hospitalist physician in 2024
262 Medicare Part D claims for 112 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass13 claims
- Albuterol Sulfate Hfa12 claims
- Prednisone12 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
- Southcoast Physicians Group IncWareham, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine H. Marks among 245 hospitalist physician records in Maine
Katherine H. Marks, MD is one of 245 hospitalist physician records with a practice address in Maine. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 81% of them.
- NPI issued2020 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 84% of these records are
- Graduated2020 · median 2012 among the 206 with a school on file
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
81 hospitalist physician records list a practice address in Portland
They are 81 of the 6,022 NPPES records with a practice address in Portland, and 245 hospitalist physician records in Maine.
All 245 in Maine → Every provider in Portland → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Lisa Almeder, MDPortland, ME 041021033238332
- Jeffrey Balke, MDPortland, ME 041021285694109
- Lane Beatty, MDPortland, ME 041021467533166
- Thomas Charrette, MDPortland, ME 041021679565626
- Anne Dean, MDPortland, ME 041021801932884
- Kathryn Diamond-Falk, MDPortland, ME 041021306045034
- Marc Jacquet, MDPortland, ME 041021740212364
- Tara Lagu, MDPortland, ME 041021306943980
Common questions
What is Katherine H. Marks, MD's NPI number?
Katherine H. Marks, MD's National Provider Identifier (NPI) is 1215564695, issued on Mar 25, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Katherine H. Marks, MD located?
The NPPES record lists a practice address at 22 Bramhall St, Portland, ME, 04102. Phone: (207) 662-0111. Providers update this record themselves, so call before visiting.
How can I verify Katherine H. Marks, MD's license?
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 Katherine H. Marks, MD prescribe under Medicare Part D?
In 2024, Katherine H. Marks, MD had 262 Medicare Part D claims for 112 beneficiaries; the average among hospitalist physician prescribers was 521. 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.