Hassan Mahmoud, M.D.
Nephrology Physician · Portland, ME
Hassan Mahmoud, M.D. is a nephrology physician with a practice address in Portland, Maine, and NPI 1720440712, issued on Mar 28, 2016. Check the license (Maine MD24603, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Hassan Mahmoud
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- MD24603 ME
Self-reported in NPPES; status is on the state search - Practice location
- 1600 Congress St Ste B, Portland, ME 04102
- Phone
- (207) 774-5222
- Enumerated
- Mar 28, 2016
- Record last updated
- Jun 16, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210804003584); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 50 in Maine → Look up another NPI →
Also registered at 1600 Congress St Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Zain Alshanableh, MDNephrology Physician1972159598
- Jonathan Amatruda, M.D.Nephrology Physician1912387713
- Lola Amdahl, PA-CPhysician Assistant1487291050
- Melissa Asci, APRN-CNPAcute Care Nurse Practitioner1881483030
- Abigail Cleary, AGACNPAcute Care Nurse Practitioner1811795008
- Robert Hayden, MDNephrology Physician1912468778
Verify Hassan Mahmoud in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license MD24603Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average nephrology physician in 2024
754 Medicare Part D claims for 191 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Amlodipine Besylate68 claims
- Atorvastatin Calcium62 claims
- Prednisone61 claims
- Furosemide41 claims
- Chlorthalidone40 claims
- Sulfamethoxazole-Trimethoprim39 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
- MainehealthBiddeford, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hassan Mahmoud among 50 nephrology physician records in Maine
Hassan Mahmoud, M.D. is one of 50 nephrology physician records with a practice address in Maine. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 84% of them.
- NPI issued2016 · 84% of these records are older, 12% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2011 · median 2001 among the 38 with a school on file
- Record last updated2021 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Maine
There are 50 nephrology physician records in Maine.
All 50 in Maine → Every provider in Portland → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Michael Akom, M.D.Portland, ME 041021508827585
- Carl Blond, M.D.Portland, ME 041021174507776
- Patricia Cantlin, DOPortland, ME 041021275533994
- Ioan Cosma, MDPortland, ME 041021356540454
- Gary Diperna, DOPortland, ME 041021649567579
- Robert Isom, M.D.Portland, ME 041021356428072
- Mahendra Mangray, MDPortland, ME 041021801074919
- Paul Parker, MDPortland, ME 041021649278029
Common questions
What is Hassan Mahmoud, M.D.'s NPI number?
Hassan Mahmoud, M.D.'s National Provider Identifier (NPI) is 1720440712, issued on Mar 28, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Hassan Mahmoud, M.D. located?
The NPPES record lists a practice address at 1600 Congress St Ste B, Portland, ME, 04102. Phone: (207) 774-5222. Providers update this record themselves, so call before visiting.
How can I verify Hassan Mahmoud, M.D.'s license?
NPPES lists Maine license number MD24603, 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 Hassan Mahmoud, M.D. prescribe under Medicare Part D?
In 2024, Hassan Mahmoud, M.D. had 754 Medicare Part D claims for 191 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Hassan Mahmoud, M.D.'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.