MARIO F FLORES MD
NPI 1437103439
Internal Medicine in Southborough, MA
About Mario F Flores Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIO F FLORES MD (NPI 1437103439) is an individual internal medicine provider in Southborough, Massachusetts, licensed in Massachusetts (151100) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Umass Memorial Healthcare-marlborough Hospital, and is a graduate of Other (1992).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
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
Mario F Flores 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 Reassignments
2Medicare enrollment records show Mario Flores reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Framingham, MA 01702
- Reassigned Medicare billing, Massachusetts enrollment
- 122 clinicians in this Medicare group
Pittsfield, MA 01201
- Reassigned Medicare billing, Massachusetts enrollment
- 394 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 12
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.
Umass Memorial Healthcare-Marlborough Hospital
Acute Care Hospitals · Marlborough, MAUmass Memorial Medical Center/University Campus
Acute Care Hospitals · Worcester, MAMetrowest Medical Center
Acute Care Hospitals · Framingham, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01772 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SOUTHBOROUGH, MA 01772
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 Mario Flores's NPI number?
The NPI number for Mario Flores is 1437103439. It was assigned to this individual provider in the NPPES registry on May 22, 2006.
Where is Mario Flores located?
Mario Flores practices at 24 Newton St, Southborough, MA 01772. The listed phone number is (508) 481-5500.
What is Mario Flores's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mario Flores enrolled in Medicare?
Yes. Mario Flores 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 Mario Flores's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mario Flores reassigns Medicare benefits to 2 organizations: Charles River Medical Associates PC (Framingham, MA) and Berkshire Medical Center, Inc (Pittsfield, MA). 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 Mario Flores's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mario Flores accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Mario Flores as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Mario Flores affiliated with any hospitals?
According to CMS data, Mario Flores is affiliated with Umass Memorial Healthcare-Marlborough Hospital, Umass Memorial Medical Center/University Campus and Metrowest Medical Center.
When was this NPI record last updated?
The NPPES record for Mario Flores was last updated on February 4, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Mario F Flores, MD · NPI 1437103439
Internal Medicine physician in Southborough, Massachusetts. Individual provider, active in the CMS NPPES registry since May 22, 2006.
## Identity
- **NPI:** 1437103439 (Entity type: Individual)
- **Enumerated:** May 22, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 151100 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 24 NEWTON ST, Southborough, MA 01772-1215
- **Phone:** (508) 481-5500
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Charles River Medical Associates PC (NPI 1598215204, Framingham, MA); Berkshire Medical Center, Inc (NPI 1295765261, Pittsfield, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1992
## Record status
- **NPPES last updated:** February 4, 2014
- **Other identifiers:** Medicare UPIN G24851; Medicare PIN A2211405 (MA); Medicaid 3161064 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1437103439) · Data from the CMS NPPES public registry.