Ireneo Diaz, M.D.
NPI 1043321409 · Internal Medicine Physician · Battle Creek, MI
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ireneo Diaz, M.D. is a Internal Medicine Physician provider in Battle Creek, MI (NPI 1043321409).
Provider details
- NPI number
- 1043321409
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301065745 (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
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
Mailing address
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2020-09-03
- Certified
- 2020-09-03
Frequently asked questions
- What is Ireneo Diaz's NPI number?
- Ireneo Diaz's National Provider Identifier (NPI) is 1043321409, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ireneo Diaz's specialty?
- Ireneo Diaz is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ireneo Diaz located?
- Ireneo Diaz's practice location on file with NPPES is 5500 Armstrong Rd, Battle Creek, MI 49015-1014.
- What is Ireneo Diaz's phone number?
- The practice phone number listed in the NPPES registry for Ireneo Diaz is (269) 966-5600.
- Does Ireneo Diaz accept Medicare?
- Ireneo Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ireneo Diaz's NPI active?
- Yes — Ireneo Diaz's NPI (1043321409) is active in the NPPES registry as of the last update on 2020-09-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.