Mary Mcmahon, LMSW
NPI 1558828897 · Social Worker · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Mcmahon, LMSW is a Social Worker provider in Ann Arbor, MI (NPI 1558828897).
Provider details
- NPI number
- 1558828897
- Entity type
- Individual
- Primary specialty
- Social WorkerBehavioral Health & Social Service Providers
- Credential
- LMSW
- Sex
- Female
- Sole proprietor
- No
- License
- 6801103757 (MI)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-02-22
- Last updated
- 2021-10-01
- Certified
- 2021-07-28
Frequently asked questions
- What is Mary Mcmahon's NPI number?
- Mary Mcmahon's National Provider Identifier (NPI) is 1558828897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Mcmahon's specialty?
- Mary Mcmahon is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary Mcmahon located?
- Mary Mcmahon's practice location on file with NPPES is 4260 Plymouth Rd, Ann Arbor, MI 48109-2700.
- What is Mary Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for Mary Mcmahon is (734) 764-6831.
- Does Mary Mcmahon accept Medicare?
- Mary Mcmahon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Mcmahon's NPI active?
- Yes — Mary Mcmahon's NPI (1558828897) is active in the NPPES registry as of the last update on 2021-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.