NPPES file of Aug 9, 2026

Theresa Guinther-Mulders, DO

Pediatrics Physician · Bay City, MI

Theresa Guinther-Mulders, DO is a pediatrics physician with a practice address in Bay City, Michigan, and NPI 1326206020, issued on May 29, 2008. Check the license (Michigan 5101017610, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1326206020
Name
Theresa Guinther-Mulders
Credential
DO
Primary taxonomy
Pediatrics Physician 208000000X
License number
5101017610 MI
Self-reported in NPPES; status is on the state search
Practice location
3884 Monitor RD, Bay City, MI 48706
Phone
(989) 671-2000
Enumerated
May 29, 2008
Record last updated
Oct 14, 2022
Fax
(989) 671-4000
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest pediatrics physician records → All 2,180 in Michigan → Look up another NPI →

Also registered at 3884 Monitor RD

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

  1. Caitlin Brosky, DDSDentist1104669183
  2. Miranda BrownFamily Nurse Practitioner1194477182
  3. Lisa CameroDental Hygienist1497132104
  4. Megan Cokley, FNPFamily Nurse Practitioner1225857329
  5. Marissa Frosheiser, DMDGeneral Practice Dentistry1861239303
  6. Tammie Horvath, PAPhysician Assistant1619347432

Verify Theresa Guinther-Mulders in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 5101017610    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
Open the Michigan license search

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Industry payments in 2024: $163.01

10 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 21,580 providers of this specialty with any payment received $842.05 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Theresa Guinther-Mulders$163.01
  2. Specialty average$842.05

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Theresa Guinther-Mulders among 2,180 pediatrics physician records in Michigan

Theresa Guinther-Mulders, DO is one of 2,180 pediatrics physician records with a practice address in Michigan. 38% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 54% of them.

  • NPI issued2008 · 54% of these records are older, 42% newer
  • In a Medicare fileYes · 38% of these records are
  • In the CMS Doctors and Clinicians fileNo · 11% of these records are
  • Record last updated2022 · 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 208000000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pediatrics Physician providers in Michigan

There are 2,180 pediatrics physician records in Michigan.

All 2,180 in Michigan → Every provider in Bay City → Pediatrics Physician nationwide →

The 8 pediatrics physician records with the nearest ZIP codes

  1. Melissa KleinfeldBay City, MI 487061609539535
  2. Inkun Shin, MDBay City, MI 487061881771244
  3. Susan Hendrickson, MDBay City, MI 487071902901366
  4. Bhaskar Devanagondi, M.D.Bay, MI 487081386704419
  5. Cindy Fine, DOBay City, MI 487081144395492
  6. Jeffrey Vangelderen, M.D.Bay City, MI 487081043217979
  7. Ashley Walker, M.D.Bay City, MI 487081669711727
  8. Alia El Mousa, MDCaro, MI 487231073716734

Common questions

What is Theresa Guinther-Mulders, DO's NPI number?

Theresa Guinther-Mulders, DO's National Provider Identifier (NPI) is 1326206020, issued on May 29, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Theresa Guinther-Mulders, DO located?

The NPPES record lists a practice address at 3884 Monitor RD, Bay City, MI, 48706. Phone: (989) 671-2000. Providers update this record themselves, so call before visiting.

How can I verify Theresa Guinther-Mulders, DO's license?

NPPES lists Michigan license number 5101017610, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

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.