Jacob Guiser
NPI 1891483426 · Psychiatry Physician · Grand Rapids, MI
Enrolled with Medicare as Order and Referring Only - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jacob Guiser is a Psychiatry Physician provider in Grand Rapids, MI (NPI 1891483426).
Provider details
- NPI number
- 1891483426
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4351050971APP23 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 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
Mailing address
Registry dates
- Enumerated
- 2023-05-01
- Last updated
- 2023-05-03
- Certified
- 2023-05-03
Frequently asked questions
- What is Jacob Guiser's NPI number?
- Jacob Guiser's National Provider Identifier (NPI) is 1891483426, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jacob Guiser's specialty?
- Jacob Guiser is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Jacob Guiser located?
- Jacob Guiser's practice location on file with NPPES is 300 68th St Se, Grand Rapids, MI 49548-6927.
- What is Jacob Guiser's phone number?
- The practice phone number listed in the NPPES registry for Jacob Guiser is (616) 456-0857.
- Does Jacob Guiser accept Medicare?
- Jacob Guiser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jacob Guiser's NPI active?
- Yes — Jacob Guiser's NPI (1891483426) is active in the NPPES registry as of the last update on 2023-05-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.