Marie H. Tanzer, MD
Pediatric Nephrology Physician · Portland, ME
Marie H. Tanzer, MD is a pediatric nephrology physician with a practice address in Portland, Maine, and NPI 1043492473, issued on Nov 27, 2007. Check the license (Maine MD19259, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Marie H. Tanzer
- Credential
- MD
- Primary taxonomy
- Pediatric Nephrology Physician 2080P0210X
- License number
- MD19259 ME
Self-reported in NPPES; status is on the state search - Practice location
- 887 Congress St, Portland, ME 04102
- Phone
- (207) 662-5522
- Enumerated
- Nov 27, 2007
- Record last updated
- Oct 30, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (207) 662-5527
- Medicare enrollment
- Enrolled (PECOS I20120816000217); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2005
- Entity
- Type 1 · individual
4 nearest pediatric nephrology physician records → All 5 in Maine → Look up another NPI →
Also registered at 887 Congress St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Georges Abourjaily, MDSurgery Physician1700874104
- Marie Abram, DOPediatric Endocrinology Physician1356961577
- Angela Amano, NPAcute Care Nurse Practitioner1720313232
- Christine Andrews, MD, MPHPediatric Gastroenterology Physician1295255198
- Amelia Baker, RDN, CDCESPediatric Nutrition Registered Dietitian1811656960
- John Bancroft, MDPediatric Gastroenterology Physician1952339178
Verify Marie H. Tanzer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license MD19259Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average pediatric nephrology physician in 2024
13 Medicare Part D claims, against an average of 67 among the 387 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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 MIPS final score for 2023 (Medicare payment program): 98.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
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).
Pediatric Nephrology Physician providers in Maine
There are 5 pediatric nephrology physician records in Maine.
All 5 in Maine → Every provider in Portland → Pediatric Nephrology Physician nationwide →
The 4 pediatric nephrology physician records with the nearest ZIP codes
- Oliver Fremont, M.D.Portland, ME 041021730127036
- Carrie Gordon, MDPortland, ME 041021215020755
- Kaitlyn Order, M.D.Portland, ME 041021437681319
- Ronald Zviti, M.D.Portland, ME 041021194042481
Common questions
What is Marie H. Tanzer, MD's NPI number?
Marie H. Tanzer, MD's National Provider Identifier (NPI) is 1043492473, issued on Nov 27, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Marie H. Tanzer, MD located?
The NPPES record lists a practice address at 887 Congress St, Portland, ME, 04102. Phone: (207) 662-5522. Providers update this record themselves, so call before visiting.
How can I verify Marie H. Tanzer, MD's license?
NPPES lists Maine license number MD19259, 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 Marie H. Tanzer, MD prescribe under Medicare Part D?
In 2024, Marie H. Tanzer, MD had 13 Medicare Part D claims; the average among pediatric nephrology physician prescribers was 67. Part D covers Medicare prescriptions only.
What is Marie H. Tanzer, MD's MIPS final score?
The 2023 MIPS final score is 98.1 of 100. 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.