1. Home
  2. Directory
  3. New York
  4. Brooklyn
  5. Specialist
  6. NPI Profile

DR. JOHN THOMAS MAHER M.D.
NPI 1437238581
Specialist in Brooklyn, NY

Active since November 02, 2006PECOS EnrolledAccepts Medicare Assignment
110 4TH AVE # LEVELC, BROOKLYN, NY 11217(712) 238-4535(718) 921-3448 Get Directions Write a Review

NPPES record last updated: March 19, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. John Thomas Maher M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN THOMAS MAHER M.D. (NPI 1437238581) is an individual specialist in Brooklyn, New York, licensed in New York (184820) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of Rutgers New Jersey Medical School (1989).

NPPES Registry Identity

NPI1437238581
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameDR. JOHN THOMAS MAHERCredential: M.D.
Location Address110 4TH AVE # LEVELCBrooklyn, NY 11217-2787
Mailing Address110 4th Ave # LevelcBrooklyn, NY 11217-2787 · (718) 852-5810 · Fax (718) 802-1223
Phone(712) 238-4535
Fax(718) 921-3448
Sole ProprietorNo
Medical School CMSRutgers New Jersey Medical SchoolGraduated 1989
Enumeration DateNovember 2, 2006
Last NPPES UpdateMarch 19, 2024
NPPES CertifiedOctober 3, 2023
✔ NPI 1437238581 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in NY · 184820
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License 184820 (NY)
110 4TH AVE # LEVELC, Brooklyn, NY 11217
Open in Google Maps ↗

Other Identifiers 1

Medicaid01511953NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. John Thomas Maher M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1759425960
PECOS Enrollment IDI20100225000252
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show John Maher reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Brooklyn Women's Healthcare Mds PC
Same address
Specialist
110 4TH AVE, LEVEL C
Brooklyn, NY 11217
  • Reassigned Medicare billing, New York enrollment
NPI 1124149018 (718) 238-1276
Kings Physician Services, PC
0.9 mi
Diagnostic Radiology
506 6TH STREET
Brooklyn, NY 11215
  • Reassigned Medicare billing, New York enrollment
  • 1,029 clinicians in this Medicare group
NPI 1083045090 (718) 780-5051

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
30 services30 patients
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091
A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.
29 services29 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
20 services17 patients

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Maher's NPI number?

The NPI number for John Maher is 1437238581. It was assigned to this individual provider in the NPPES registry on November 2, 2006.

Where is John Maher located?

John Maher practices at 110 4th Ave # Levelc, Brooklyn, NY 11217. The listed phone number is (712) 238-4535.

What is John Maher's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is John Maher enrolled in Medicare?

Yes. John Maher is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for John Maher's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Maher reassigns Medicare benefits to 2 organizations: Brooklyn Women's Healthcare Mds PC (Brooklyn, NY) and Kings Physician Services, PC (Brooklyn, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Maher's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for John Maher was last updated on March 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.