What is John Zander's NPI number?

John Zander's National Provider Identifier (NPI) is 1558458349, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is John Zander's specialty?

John Zander is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).

Where is John Zander located?

John Zander's practice location on file with NPPES is 1751 Washington Ave, Alton, IL 62002-4624.

What is John Zander's phone number?

The practice phone number listed in the NPPES registry for John Zander is (773) 839-9794.

Is John Zander's NPI active?

Yes — John Zander's NPI (1558458349) is active in the NPPES registry as of the last update on 2026-05-17.

IndividualActive

John Zander, M.D.

NPI 1558458349 · Surgery Physician · Alton, IL

John Zander, M.D. is a Surgery Physician provider in Alton, IL (NPI 1558458349).

Provider details

NPI number: 1558458349
Entity type: Individual
Primary specialty: Surgery PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Male
Sole proprietor: No
License: 036062146 (IL)

Specialties & taxonomies

Surgery PhysicianPrimary208600000XLicense 036062146 (IL)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(90/100 index)

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

1751 Washington Ave

Alton, IL 62002-4624

Phone: (773) 839-9794

Street-level locationGet directions

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Mailing address