John Thomas Maher, M.D.
Specialist · Brooklyn, NY
John Thomas Maher, M.D. is a specialist with a practice address in Brooklyn, New York, and NPI 1437238581, issued on Nov 2, 2006. Check the license (New York 184820, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Thomas Maher
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 184820 NY
Self-reported in NPPES; status is on the state search - Practice location
- 110 4TH Ave # Levelc, Brooklyn, NY 11217
- Phone
- (712) 238-4535
- Enumerated
- Nov 2, 2006
- Record last updated
- Mar 19, 2024
- Fax
- (718) 921-3448
- Medicaid ID
- 01511953 NY
- Medicare enrollment
- Enrolled (PECOS I20100225000252); accepts Medicare assignment
- Medical or professional school
- Rutgers New Jersey Medical School, 1989
- Entity
- Type 1 · individual
8 nearest specialist records → All 22,636 in New York → Look up another NPI →
Verify John Thomas Maher in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 184820Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average specialist in 2024
103 Medicare Part D claims for 42 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D.
Most prescribed
- Nitrofurantoin Mono-Macro15 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.
John Thomas Maher among 22,636 specialist records in New York
John Thomas Maher, M.D. is one of 22,636 specialist records with a practice address in New York. 6% 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 1% of them.
- NPI issued2006 · 1% of these records are older, 92% newer
- In a Medicare fileYes · 6% of these records are
- In the CMS Doctors and Clinicians fileYes · 4% of these records are
- Graduated1989 · median 1990 among the 943 with a school on file
- Record last updated2024 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
5,700 specialist records list a practice address in Brooklyn
They are 5,700 of the 64,057 NPPES records with a practice address in Brooklyn, and 22,636 specialist records in New York.
All 22,636 in New York → Every provider in Brooklyn → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Koren Brigham, MABrooklyn, NY 112171518212190
- Shari FieldsBrooklyn, NY 112171497196448
- Julia FisherBrooklyn, NY 112171457649097
- Judy Fram, PT, IBCLCBrooklyn, NY 112171477763837
- Berdette Henry, M.S.Brooklyn, NY 112171205199577
- Larry JosephBrooklyn, NY 112171083049837
- Thomas Koutelos, INTERNAL MEDICINEBrooklyn, NY 112171679647465
- Ami Paradise, MSEDBrooklyn, NY 112171417233834
Common questions
What is John Thomas Maher, M.D.'s NPI number?
John Thomas Maher, M.D.'s National Provider Identifier (NPI) is 1437238581, issued on Nov 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Thomas Maher, M.D. located?
The NPPES record lists a practice address at 110 4TH Ave # Levelc, Brooklyn, NY, 11217. Phone: (712) 238-4535. Providers update this record themselves, so call before visiting.
How can I verify John Thomas Maher, M.D.'s license?
NPPES lists New York license number 184820, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does John Thomas Maher, M.D. prescribe under Medicare Part D?
In 2024, John Thomas Maher, M.D. had 103 Medicare Part D claims for 42 beneficiaries; the average among specialist prescribers was 1,380. 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.