Theresa Guinther-Mulders, DO
NPI 1326206020 · Pediatrics Physician · Bay City, MI
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Theresa Guinther-Mulders, DO is a Pediatrics Physician provider in Bay City, MI (NPI 1326206020).
Provider details
- NPI number
- 1326206020
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 5101017610 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
18 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$163 across 10 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-05-29
- Last updated
- 2022-10-14
- Certified
- 2022-10-14
Frequently asked questions
- What is Theresa Guinther-Mulders's NPI number?
- Theresa Guinther-Mulders's National Provider Identifier (NPI) is 1326206020, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theresa Guinther-Mulders's specialty?
- Theresa Guinther-Mulders is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Theresa Guinther-Mulders located?
- Theresa Guinther-Mulders's practice location on file with NPPES is 3884 Monitor Rd, Bay City, MI 48706-9298.
- What is Theresa Guinther-Mulders's phone number?
- The practice phone number listed in the NPPES registry for Theresa Guinther-Mulders is (989) 671-2000.
- Does Theresa Guinther-Mulders accept Medicare?
- Theresa Guinther-Mulders is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Theresa Guinther-Mulders's NPI active?
- Yes — Theresa Guinther-Mulders's NPI (1326206020) is active in the NPPES registry as of the last update on 2022-10-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.