JAMES M MASON MD
NPI 1346277050
Internal Medicine in Fairport, NY
About James M Mason Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAMES M MASON MD (NPI 1346277050) is an individual internal medicine provider in Fairport, New York, licensed in New York (179303) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Strong Memorial Hospital, and is a graduate of Georgetown University School Of Medicine (1988).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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
James M Mason Md 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.
Medicare Billing Reassignment
Medicare enrollment records show James Mason reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Rochester, NY 14642
- Reassigned Medicare billing, New York enrollment
- 279 clinicians in this Medicare group
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 4
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Strong Memorial Hospital
Acute Care Hospitals · Rochester, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 14450 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 James Mason's NPI number?
The NPI number for James Mason is 1346277050. It was assigned to this individual provider in the NPPES registry on June 27, 2006.
Where is James Mason located?
James Mason practices at 800 Ayrault Rd Ste 200, Fairport, NY 14450. The listed phone number is (585) 602-2300.
What is James Mason's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is James Mason enrolled in Medicare?
Yes. James Mason 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 organization bills Medicare for James Mason's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Mason reassigns Medicare benefits to University Of Rochester (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 James Mason's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is James Mason affiliated with any hospitals?
According to CMS data, James Mason is affiliated with Strong Memorial Hospital.
When was this NPI record last updated?
The NPPES record for James Mason was last updated on June 30, 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.
# James M Mason, MD · NPI 1346277050
Internal Medicine physician in Fairport, New York. Individual provider, active in the CMS NPPES registry since June 27, 2006.
## Identity
- **NPI:** 1346277050 (Entity type: Individual)
- **Enumerated:** June 27, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 179303 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 800 AYRAULT RD STE 200, Fairport, NY 14450-8941
- **Phone:** (585) 602-2300 · **Fax:** (585) 425-2750
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** University Of Rochester (NPI 1710226824, Rochester, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Georgetown University School Of Medicine, class of 1988
## Record status
- **NPPES last updated:** June 30, 2023
- **Other identifiers:** Medicaid 01275016 (NY); Other 5691605 (NY)
---
Source: [NPI Profile](https://npiprofile.com/npi/1346277050) · Data from the CMS NPPES public registry.