DR. JOHN MARTIN (PH.D.) – Psychologist, NPI 1417921271

DR. JOHN MARTIN (PH.D.) is a healthcare provider. based in Naperville, Illinois. specializing in Psychologist. They hold the professional credentials PH.D.. The NPI Number for DR. JOHN MARTIN (PH.D.) is 1417921271

Main info

Male
45 Years Of Experience
Accepts Medicare Assignment
Name
DR. JOHN MARTIN (PH.D.)
NPI
1417921271
Phone
(630) 355-9933
Address
29 S WEBSTER ST
Enumeration Date
16 February 2006
Last Update Date
8 July 2007

Doctor Profile

Medical School Name
OTHER
Secondary Phone
-
Graduation Year
1981 (45 years ago)
PAC ID
6103838735
Professional Enrollment ID
I20060626000139
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience45
Completeness75
Years active:20State licenses:0Digital endpointsOther names

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Provider Addresses for DR. JOHN MARTIN (PH.D.)

  • Drs. Knotek, Hertzberg and Rafferty-Optometrists, 29, South Webster Street, Downtown Naperville, Naperville, DuPage County, Illinois, 60540, United States

    SUITE 220

    NAPERVILLE, IL 605405356

    Phone: (630) 355-9933

    Mailing address matches the actual address.

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

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Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 60540)

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Reviews

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Frequently asked questions

Can I use this page to confirm DR. JOHN MARTIN (PH.D.)'s NPI?
Yes. DR. JOHN MARTIN (PH.D.) is listed with NPI 1417921271 in the public NPI dataset.
Is DR. JOHN MARTIN (PH.D.) still practicing?
DR. JOHN MARTIN (PH.D.) is currently listed as active in the public NPI registry.
What taxonomy line describes DR. JOHN MARTIN (PH.D.)?
For research purposes, treat DR. JOHN MARTIN (PH.D.) as Psychologist in this dataset. Clinical services aligned with this taxonomy classification.
Where is DR. JOHN MARTIN (PH.D.) based?
DR. JOHN MARTIN (PH.D.) is tied to Naperville, Illinois in the data we show; additional addresses may exist on the full record.
Is the information about DR. JOHN MARTIN (PH.D.) up to date?
Data updates when providers file changes in NPPES — treat critical facts as "verify if unsure."

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