Mary Brenna McMahon, LMSW
Social Worker · Ann Arbor, MI
Mary Brenna McMahon, LMSW is a social worker with a practice address in Ann Arbor, Michigan, and NPI 1558828897, issued on Feb 22, 2019. Check the license (Michigan 6801109270, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Brenna McMahon
- Credential
- LMSW
- Primary taxonomy
- Social Worker 104100000X
- License numbers
- 6801109270 MI
6801103757 MI
Self-reported in NPPES; status is on the state search - Practice location
- 4260 Plymouth RD, Ann Arbor, MI 48109
- Phone
- (734) 764-6831
- Enumerated
- Feb 22, 2019
- Record last updated
- Oct 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20220118000838); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest social worker records → All 9,114 in Michigan → Look up another NPI →
Also registered at 4260 Plymouth RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Regina Abney, MSWClinical Social Worker1518009877
- Michelle Adgate, MSWClinical Social Worker1942063235
- Neil Alexander, MDGeriatric Medicine (Internal Medicine) Physician1760563118
- Marjorie Almeda, DOGeriatric Medicine (Internal Medicine) Physician1295740728
- James Baker, MDPediatrics Physician1790791952
- Sami Barmada, MD, PHDNeurology Physician1144247891
Verify Mary Brenna McMahon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 6801109270Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Regents OF The University OF MichiganAnn Arbor, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Brenna McMahon among 9,114 social worker records in Michigan
Mary Brenna McMahon, LMSW is one of 9,114 social worker records with a practice address in Michigan. 7% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 58% of them.
- NPI issued2019 · 58% of these records are older, 36% newer
- In a Medicare fileYes · 7% of these records are
- In the CMS Doctors and Clinicians fileYes · 10% of these records are
- Graduated2018 · median 2012 among the 914 with a school on file
- Record last updated2021 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 104100000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
369 social worker records list a practice address in Ann Arbor
They are 369 of the 15,616 NPPES records with a practice address in Ann Arbor, and 9,114 social worker records in Michigan.
All 9,114 in Michigan → Every provider in Ann Arbor → Social Worker nationwide →
The 8 social worker records with the nearest ZIP codes
- Patrick Chase, MSWAnn Arbor, MI 481091326161589
- Kathleen Dylan, MSWAnn Arbor, MI 481091801910534
- Sara Edwards, MSWAnn Arbor, MI 481091619009073
- Janet Fogler, MSWAnn Arbor, MI 481091114060118
- Diane Griffith, MSWAnn Arbor, MI 481091871628420
- Natalie Kiff, MSWAnn Arbor, MI 481091811048630
- Jonathan Marin, ACSW,LMSWAnn Arbor, MI 481091831227586
- Laura Nitzberg, MSWAnn Arbor, MI 481091891914958
Common questions
What is Mary Brenna McMahon, LMSW's NPI number?
Mary Brenna McMahon, LMSW's National Provider Identifier (NPI) is 1558828897, issued on Feb 22, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Mary Brenna McMahon, LMSW located?
The NPPES record lists a practice address at 4260 Plymouth RD, Ann Arbor, MI, 48109. Phone: (734) 764-6831. Providers update this record themselves, so call before visiting.
How can I verify Mary Brenna McMahon, LMSW's license?
NPPES lists Michigan license number 6801109270, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.