Leonard Hertko, M.D.
NPI 1407090491 · Internal Medicine Physician · Orland Park, IL
Leonard Hertko, M.D. is a Internal Medicine Physician provider in Orland Park, IL (NPI 1407090491).
Provider details
- NPI number
- 1407090491
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036038642 (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
17 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
- 2009-04-22
- Last updated
- 2009-04-22
Frequently asked questions
- What is Leonard Hertko's NPI number?
- Leonard Hertko's National Provider Identifier (NPI) is 1407090491, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Hertko's specialty?
- Leonard Hertko is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Leonard Hertko located?
- Leonard Hertko's practice location on file with NPPES is 13561 Ishnala Dr, Orland Park, IL 60462-1885.
- What is Leonard Hertko's phone number?
- The practice phone number listed in the NPPES registry for Leonard Hertko is (708) 349-7112.
- Is Leonard Hertko's NPI active?
- Yes — Leonard Hertko's NPI (1407090491) is active in the NPPES registry as of the last update on 2009-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.