Riley Kaiser
NPI 1881335891 · Family Medicine Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Riley Kaiser is a Family Medicine Physician provider in Grand Rapids, MI (NPI 1881335891).
Provider details
- NPI number
- 1881335891
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 4351049052 (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
4 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 68 | 21 |
| Atorvastatin Calcium | 64 | 25 |
| Lisinopril | 42 | 15 |
| Losartan Potassium | 36 | 11 |
| Hydrochlorothiazide | 26 | 12 |
| Metoprolol Succinate | 25 | — |
| Pantoprazole Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-04-05
- Last updated
- 2022-12-05
- Certified
- 2022-12-05
Frequently asked questions
- What is Riley Kaiser's NPI number?
- Riley Kaiser's National Provider Identifier (NPI) is 1881335891, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Riley Kaiser's specialty?
- Riley Kaiser is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Riley Kaiser located?
- Riley Kaiser's practice location on file with NPPES is 300 Lafayette Ave Se Ste 4000, Grand Rapids, MI 49503-4692.
- What is Riley Kaiser's phone number?
- The practice phone number listed in the NPPES registry for Riley Kaiser is (616) 685-6922.
- Does Riley Kaiser accept Medicare?
- Riley Kaiser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Riley Kaiser's NPI active?
- Yes — Riley Kaiser's NPI (1881335891) is active in the NPPES registry as of the last update on 2022-12-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.