MARY MARGARET GLEASON MD
NPI 1023136389
Psychiatry & Neurology - Child & Adolescent Psychiatry in Boston, MA
About Mary Margaret Gleason Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY MARGARET GLEASON MD (NPI 1023136389) is an individual child & adolescent psychiatry provider in Boston, Massachusetts, licensed in Massachusetts (1021055) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mary Margaret Gleason Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Mary Margaret Gleason reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 86 clinicians in this Medicare group
Norfolk, VA 23507
- Reassigned Medicare billing, Virginia enrollment
- 549 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.
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.
BOSTON, MA 02115
BOSTON, MA 02115
BOSTON, MA 02115
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 Mary Margaret Gleason's NPI number?
The NPI number for Mary Margaret Gleason is 1023136389. It was assigned to this individual provider in the NPPES registry on March 26, 2007.
Where is Mary Margaret Gleason located?
Mary Margaret Gleason practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6000.
What is Mary Margaret Gleason's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.
Is Mary Margaret Gleason enrolled in Medicare?
Yes. Mary Margaret Gleason is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mary Margaret Gleason's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Margaret Gleason reassigns Medicare benefits to 2 organizations: Richmond Psychiatry Group Practice (Boston, MA) and Childrens Specialty Group PLLC (Norfolk, VA). 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 Mary Margaret Gleason's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Margaret Gleason accept?
Health plans from Harvard Pilgrim Health Care and Taro Health list Mary Margaret Gleason 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.
When was this NPI record last updated?
The NPPES record for Mary Margaret Gleason was last updated on October 21, 2024. 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.
# Mary Margaret Gleason, MD · NPI 1023136389
Child & Adolescent Psychiatry physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since March 26, 2007.
## Identity
- **NPI:** 1023136389 (Entity type: Individual)
- **Enumerated:** March 26, 2007
- **Primary specialty:** Psychiatry & Neurology - Child & Adolescent Psychiatry · taxonomy 2084P0804X
- **State license:** 1021055 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 LONGWOOD AVE, Boston, MA 02115-5737
- **Phone:** (617) 355-6000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): Richmond Psychiatry Group Practice (NPI 1629148036, Boston, MA); Childrens Specialty Group PLLC (NPI 1255354130, Norfolk, VA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 21, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1023136389) · Data from the CMS NPPES public registry.