HOLLY S MASON M.D.
NPI 1033201462
Surgery in Springfield, MA
About Holly S Mason M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HOLLY S MASON M.D. (NPI 1033201462) is an individual surgery provider in Springfield, Massachusetts, licensed in Massachusetts (213644) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, is affiliated with Baystate Franklin Medical Center, and is a graduate of University Of Vermont College Of Medicine (1995).
NPPES Registry Identity
Specialties & Licenses 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
Holly S Mason 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.
Medicare Billing Reassignment
Medicare enrollment records show Holly Mason reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Springfield, MA 01199
- Reassigned Medicare billing, Massachusetts enrollment
- 1,537 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 6
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Baystate Franklin Medical Center
Acute Care Hospitals · Greenfield, MABaystate Noble Hospital
Acute Care Hospitals · Westfield, MABaystate Medical Center
Acute Care Hospitals · Springfield, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01107 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SPRINGFIELD, MA 01107
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 Holly Mason's NPI number?
The NPI number for Holly Mason is 1033201462. It was assigned to this individual provider in the NPPES registry on September 30, 2006.
Where is Holly Mason located?
Holly Mason practices at 100 Wason Avenue, Springfield, MA 01107. The listed phone number is (413) 794-5265.
What is Holly Mason's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Holly Mason enrolled in Medicare?
Yes. Holly 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 Holly Mason's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Holly Mason reassigns Medicare benefits to Baystate Medical Practices, Inc (Springfield, MA). 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 Holly Mason's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Holly Mason affiliated with any hospitals?
According to CMS data, Holly Mason is affiliated with Baystate Franklin Medical Center, Baystate Noble Hospital and Baystate Medical Center.
When was this NPI record last updated?
The NPPES record for Holly Mason was last updated on January 18, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Holly S Mason, M.D. · NPI 1033201462
Surgery physician in Springfield, Massachusetts. Individual provider, active in the CMS NPPES registry since September 30, 2006.
## Identity
- **NPI:** 1033201462 (Entity type: Individual)
- **Enumerated:** September 30, 2006
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** 213644 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 WASON AVENUE, Springfield, MA 01107-1179
- **Phone:** (413) 794-5265 · **Fax:** (413) 794-1794
## 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:** Baystate Medical Practices, Inc (NPI 1548205909, Springfield, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Vermont College Of Medicine, class of 1995
## Record status
- **NPPES last updated:** January 18, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1033201462) · Data from the CMS NPPES public registry.