John Greager, MD
NPI 1427164722 · Surgery Physician · Lombard, IL
John Greager, MD is a Surgery Physician provider in Lombard, IL (NPI 1427164722).
Provider details
- NPI number
- 1427164722
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Surgical Oncology Physician2086X0206X
Allopathic & Osteopathic Physicians
- General Practice Physician208D00000X
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
83% 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
- 2006-08-21
- Last updated
- 2007-10-13
Frequently asked questions
- What is John Greager's NPI number?
- John Greager's National Provider Identifier (NPI) is 1427164722, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Greager's specialty?
- John Greager is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is John Greager located?
- John Greager's practice location on file with NPPES is 1263 S Highland Ave, Lombard, IL 60148-4516.
- What is John Greager's phone number?
- The practice phone number listed in the NPPES registry for John Greager is (630) 261-0280.
- Is John Greager's NPI active?
- Yes — John Greager's NPI (1427164722) is active in the NPPES registry as of the last update on 2007-10-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.