1. Home
  2. Directory
  3. New York
  4. Henrietta
  5. Internal Medicine
  6. NPI Profile

DR. THOMAS LANG MAHONEY M.D.
NPI 1235166414
Internal Medicine in Henrietta, NY

Active since June 26, 2006PECOS Enrolled
3875 E HENRIETTA RD, HENRIETTA, NY 14467(585) 334-4200 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Thomas Lang Mahoney M.d. NPPES

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

DR. THOMAS LANG MAHONEY M.D. (NPI 1235166414) is an individual internal medicine provider in Henrietta, New York, licensed in New York (142554) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1235166414
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. THOMAS LANG MAHONEYCredential: M.D.
Location Address3875 E HENRIETTA RDHenrietta, NY 14467-9147
Mailing Address39 Rock Creek RdPittsford, NY 14534-2841 · (585) 586-5656
Phone(585) 334-4200
Sole ProprietorNo
Enumeration DateJune 26, 2006
Last NPPES UpdateMarch 7, 2023
✔ NPI 1235166414 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NY · 142554
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
3875 E HENRIETTA RD, Henrietta, NY 14467
Open in Google Maps ↗

Other Identifiers 6

Other0977NY · Bcbs Number
Other142554NY · Liscense
Other010142554NY · Blue Choice
Other187ANY · Preferred Care Id
Medicaid00762203NY
OtherCIM 231398NY · Workers Comp Number

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Thomas Lang Mahoney M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show Thomas Mahoney reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Rochester General Hospital
3.9 mi
Family Medicine
181 LOMB MEMORIAL DR
Rochester, NY 14623
  • Reassigned Medicare billing, New York enrollment
  • 2,285 clinicians in this Medicare group
NPI 1174990303 (585) 922-3100

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 14467 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.87 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.08 typical visit price
range $17.54 – $136.14
Typical copayment $24.27 (range $4.38 – $34.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. JAMES JOSEPH HOROHOE M.D.
Internal Medicine
3875 E HENRIETTA RD
HENRIETTA, NY 14467
Monroe County (585) 334-4200
MAHONEY HOROHOE AND GARNEAU PTRS
Internal Medicine
3875 E HENRIETTA RD
HENRIETTA, NY 14467
Monroe County (585) 334-4200
SUSAN FREAY SULEWSKI FNP
Nurse Practitioner
3875 E HENRIETTA RD
HENRIETTA, NY 14467
Monroe County (585) 334-4200
JOHN JOSEPH GARNEAU JR. M.D.
Internal Medicine
3875 E HENRIETTA RD
HENRIETTA, NY 14467
Monroe County (585) 334-4200

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 Thomas Mahoney's NPI number?

The NPI number for Thomas Mahoney is 1235166414. It was assigned to this individual provider in the NPPES registry on June 26, 2006.

Where is Thomas Mahoney located?

Thomas Mahoney practices at 3875 E Henrietta Rd, Henrietta, NY 14467. The listed phone number is (585) 334-4200.

What is Thomas Mahoney's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Thomas Mahoney enrolled in Medicare?

Yes. Thomas Mahoney is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Thomas Mahoney's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Mahoney reassigns Medicare benefits to Rochester General Hospital (Rochester, NY). The 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 Thomas Mahoney'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 Thomas Mahoney was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.