John Mack, DO
NPI 1164384434 · Emergency Medicine Physician · Lansing, MI
Enrolled with Medicare as Order and Referring Only - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mack, DO is a Emergency Medicine Physician provider in Lansing, MI (NPI 1164384434).
Provider details
- NPI number
- 1164384434
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 5151017724 (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
Under 1 yr in 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
- 2025-11-25
- Last updated
- 2025-11-25
- Certified
- 2025-11-24
Frequently asked questions
- What is John Mack's NPI number?
- John Mack's National Provider Identifier (NPI) is 1164384434, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mack's specialty?
- John Mack is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Mack located?
- John Mack's practice location on file with NPPES is 2900 Collins Rd, Lansing, MI 48910-8394.
- What is John Mack's phone number?
- The practice phone number listed in the NPPES registry for John Mack is (517) 975-6000.
- Does John Mack accept Medicare?
- John Mack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mack's NPI active?
- Yes — John Mack's NPI (1164384434) is active in the NPPES registry as of the last update on 2025-11-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.