NPPES file of Aug 9, 2026

Mary Leigh Stewart-Thornton, LLMSW

Marriage & Family Therapist · Lansing, MI

Mary Leigh Stewart-Thornton, LLMSW is a marriage & family therapist with a practice address in Lansing, Michigan, and NPI 1740029891, issued on May 20, 2024. Check the license (Michigan 6851102331, as entered in NPPES) with the Michigan board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1740029891
Name
Mary Leigh Stewart-Thornton
Credential
LLMSW
Primary taxonomy
Marriage & Family Therapist 106H00000X
License number
6851102331 MI
Self-reported in NPPES; status is on the state search
Practice location
1213 New York Ave, Lansing, MI 48906
Phone
(517) 243-4780
Enumerated
May 20, 2024
Record last updated
May 20, 2024
Medicare enrollment
Enrolled (PECOS I20260518000820); may accept Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest marriage & family therapist records → All 496 in Michigan → Look up another NPI →

Verify Mary Leigh Stewart-Thornton in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Michigan board licenses this profession
    Search for license 6851102331    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Michigan license search

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Mary Leigh Stewart-Thornton among 496 marriage & family therapist records in Michigan

Mary Leigh Stewart-Thornton, LLMSW is one of 496 marriage & family therapist records with a practice address in Michigan. 5% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2024, is newer than 87% of them.

  • NPI issued2024 · 87% of these records are older, 9% newer
  • In a Medicare fileNo · 5% of these records are
  • In the CMS Doctors and Clinicians fileYes · 11% of these records are
  • Graduated1989 · median 2011 among the 56 with a school on file
  • Record last updated2024 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 106H00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Marriage & Family Therapist providers in Michigan

There are 496 marriage & family therapist records in Michigan. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 496 in Michigan → Every provider in Lansing → Marriage & Family Therapist nationwide →

The 8 marriage & family therapist records with the nearest ZIP codes

  1. Kelly Dietzel, MS, LLMFTLansing, MI 489061679914055
  2. Kathleen Jager, PH.D., LMFT, LLPLansing, MI 489101417167065
  3. Laura Mohr, PH.DLansing, MI 489101366582843
  4. Kari RehmannLansing, MI 489101376674101
  5. Yaochong HuangLansing, MI 489111356100986
  6. Gianna Casaburo, LLMFTLansing, MI 489121053804260
  7. Gabriela Lopez-Zeron, PHD, LMFTLansing, MI 489121124775671
  8. Claire NussdorferLansing, MI 489121588512958

Common questions

What is Mary Leigh Stewart-Thornton, LLMSW's NPI number?

Mary Leigh Stewart-Thornton, LLMSW's National Provider Identifier (NPI) is 1740029891, issued on May 20, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Mary Leigh Stewart-Thornton, LLMSW located?

The NPPES record lists a practice address at 1213 New York Ave, Lansing, MI, 48906. Phone: (517) 243-4780. Providers update this record themselves, so call before visiting.

How can I verify Mary Leigh Stewart-Thornton, LLMSW's license?

NPPES lists Michigan license number 6851102331, 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. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.