Ryan Nazareno, MD
NPI 1609660638 · Internal Medicine Physician · Grand Rapids, MI
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Nazareno, MD is a Internal Medicine Physician provider in Grand Rapids, MI (NPI 1609660638).
Provider details
- NPI number
- 1609660638
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4351054557 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 275 Michigan St Ne Ste2100 9th FloorGrand Rapids, MI 49503-2526Phone: (616) 391-3777Fax: (616) 391-3755
Registry dates
- Enumerated
- 2025-04-07
- Last updated
- 2026-05-25
- Certified
- 2026-05-25
Frequently asked questions
- What is Ryan Nazareno's NPI number?
- Ryan Nazareno's National Provider Identifier (NPI) is 1609660638, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Nazareno's specialty?
- Ryan Nazareno is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Nazareno located?
- Ryan Nazareno's practice location on file with NPPES is 275 Michigan St Ne Ste, Grand Rapids, MI 49503.
- What is Ryan Nazareno's phone number?
- The practice phone number listed in the NPPES registry for Ryan Nazareno is (616) 391-8810.
- Does Ryan Nazareno accept Medicare?
- Ryan Nazareno is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Nazareno's NPI active?
- Yes — Ryan Nazareno's NPI (1609660638) is active in the NPPES registry as of the last update on 2026-05-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.