IndividualActive
James Guigelaar, MD
NPI 1831105956 · Internal Medicine Physician · Bay City, MI
James Guigelaar, MD is a Internal Medicine Physician provider in Bay City, MI (NPI 1831105956).
Provider details
- NPI number
- 1831105956
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- JG042006 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
200 S Wenona St
Suite 225
Bay City, MI 48706-8820
Phone: (989) 893-9705
Fax: (989) 893-8206
Street-level locationGet directions
Mailing address
200 S Wenona St
Bay City, MI 48706-8820
Registry dates
- Enumerated
- 2006-07-31
- Last updated
- 2007-11-19
Frequently asked questions
- What is James Guigelaar's NPI number?
- James Guigelaar's National Provider Identifier (NPI) is 1831105956, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Guigelaar's specialty?
- James Guigelaar is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Guigelaar located?
- James Guigelaar's practice location on file with NPPES is 200 S Wenona St, Bay City, MI 48706-8820.
- What is James Guigelaar's phone number?
- The practice phone number listed in the NPPES registry for James Guigelaar is (989) 893-9705.
- Is James Guigelaar's NPI active?
- Yes — James Guigelaar's NPI (1831105956) is active in the NPPES registry as of the last update on 2007-11-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.