John Holden, MD
NPI 1356341846 · Gastroenterology Physician · Downers Grove, IL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Holden, MD is a Gastroenterology Physician provider in Downers Grove, IL (NPI 1356341846).
Provider details
- NPI number
- 1356341846
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036054681 (IL)
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
20 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
- 2005-07-26
- Last updated
- 2008-04-28
Frequently asked questions
- What is John Holden's NPI number?
- John Holden's National Provider Identifier (NPI) is 1356341846, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Holden's specialty?
- John Holden is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is John Holden located?
- John Holden's practice location on file with NPPES is 3825 Highland Ave Suite 203, Downers Grove, IL 60515-1552.
- What is John Holden's phone number?
- The practice phone number listed in the NPPES registry for John Holden is (630) 969-1167.
- Does John Holden accept Medicare?
- John Holden is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Holden's NPI active?
- Yes — John Holden's NPI (1356341846) is active in the NPPES registry as of the last update on 2008-04-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.