NPPES file of Aug 9, 2026

Mariel Ann Hajjar, FNP-BC

Nurse Practitioner · Ann Arbor, MI

Mariel Ann Hajjar, FNP-BC is a nurse practitioner with a practice address in Ann Arbor, Michigan, and NPI 1790508828, issued on Nov 6, 2024. Check the license (Michigan 4704364622, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1790508828
Name
Mariel Ann Hajjar
Credential
FNP-BC
Primary taxonomy
Nurse Practitioner 363L00000X
License number
4704364622 MI
Self-reported in NPPES; status is on the state search
Practice location
426 N Ingalls St, Ann Arbor, MI 48109
Phone
(734) 763-5985
Enumerated
Nov 6, 2024
Record last updated
Nov 6, 2024
Medicare enrollment
Enrolled (PECOS I20260314000443); accepts 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 nurse practitioner records → All 3,574 in Michigan → Look up another NPI →

Also registered at 426 N Ingalls St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Iman Al-BargwiFamily Nurse Practitioner1770466005
  2. Olivia ArguelloStudent in an Organized Health Care Education/Training Program1548113228
  3. Rita Babijaev, RNMidwife1336982800
  4. Reem BerriAdvanced Practice Midwife1548001316
  5. Anastasia BloughRegistered Nurse1992545347
  6. Kara CallaghanMidwife1114767092

Verify Mariel Ann Hajjar 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 4704364622    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Danny Kewson M.D. P.CDearborn, MI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Mariel Ann Hajjar among 3,574 nurse practitioner records in Michigan

Mariel Ann Hajjar, FNP-BC is one of 3,574 nurse practitioner records with a practice address in Michigan. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 91% of them.

  • NPI issued2024 · 91% of these records are older, 5% newer
  • In a Medicare fileYes · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 56% of these records are
  • Graduated2024 · median 2017 among the 1,983 with a school on file
  • Record last updated2024 · 52% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

704 nurse practitioner records list a practice address in Ann Arbor

They are 704 of the 15,616 NPPES records with a practice address in Ann Arbor, and 3,574 nurse practitioner records in Michigan.

All 3,574 in Michigan → Every provider in Ann Arbor → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Kathleen Allen, NPAnn Arbor, MI 481091073556619
  2. Denise Bauer, N.P.Ann Arbor, MI 481091497724835
  3. Helen Bauer, NPAnn Arbor, MI 481091720026602
  4. Danielle Bozaan, NPAnn Arbor, MI 481091922053818
  5. Deborah Caplan, NPAnn Arbor, MI 481091699725721
  6. Tina Garcia, NPAnn Arbor, MI 481091013997659
  7. Helen Kuch-Kunich, CNNPAnn Arbor, MI 481091841285905
  8. Emily Marlow, NPAnn Arbor, MI 481091447293477

Common questions

What is Mariel Ann Hajjar, FNP-BC's NPI number?

Mariel Ann Hajjar, FNP-BC's National Provider Identifier (NPI) is 1790508828, issued on Nov 6, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Mariel Ann Hajjar, FNP-BC located?

The NPPES record lists a practice address at 426 N Ingalls St, Ann Arbor, MI, 48109. Phone: (734) 763-5985. Providers update this record themselves, so call before visiting.

How can I verify Mariel Ann Hajjar, FNP-BC's license?

NPPES lists Michigan license number 4704364622, 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.

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.