DR. MAXWELL IRVING MAYER M.D.
NPI 1609123207
Psychiatry & Neurology - Psychiatry in Fall River, MA
About Dr. Maxwell Irving Mayer M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MAXWELL IRVING MAYER M.D. (NPI 1609123207) is an individual psychiatry provider in Fall River, Massachusetts, licensed in Massachusetts (274121) and active in the NPI registry since August 2012. He is enrolled in Medicare PECOS and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
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. Maxwell Irving Mayer 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 Maxwell Mayer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fall River, MA 02720
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1740359611 (Massachusetts)
- 42 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 2
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02720 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.
FALL RIVER, MA 02720
FALL RIVER, MA 02720
FALL RIVER, MA 02720
FALL RIVER, MA 02720
FALL RIVER, MA 02720
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 Maxwell Mayer's NPI number?
The NPI number for Maxwell Mayer is 1609123207. It was assigned to this individual provider in the NPPES registry on August 14, 2012.
Where is Maxwell Mayer located?
Maxwell Mayer practices at 49 Hillside St, Fall River, MA 02720. The listed phone number is (508) 235-7333.
What is Maxwell Mayer's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Maxwell Mayer enrolled in Medicare?
Yes. Maxwell Mayer 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 Maxwell Mayer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Maxwell Mayer reassigns Medicare benefits to The Commonwealth Of Massachusetts (Fall River, 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 Maxwell Mayer'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 Maxwell Mayer was last updated on December 13, 2023. 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.
# Dr. Maxwell Irving Mayer, M.D. · NPI 1609123207
Psychiatry physician in Fall River, Massachusetts. Individual provider, active in the CMS NPPES registry since August 14, 2012.
## Identity
- **NPI:** 1609123207 (Entity type: Individual)
- **Enumerated:** August 14, 2012
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 274121 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 49 HILLSIDE ST, Fall River, MA 02720-5211
- **Phone:** (508) 235-7333
## 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:** The Commonwealth Of Massachusetts (NPI 1194803288, Fall River, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** December 13, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1609123207) · Data from the CMS NPPES public registry.