Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

David J. Knudtson, MD

Individual provider Internal Medicine Physician · NPI 1558420323

David J. Knudtson, MD is an Internal Medicine in Naples, Florida. Graduated from Northwestern University Feinberg Medical School in 1991, 35 years ago. Practices with Millennium Physician Group LLC, a 970-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Florida and Illinois.

Years since qualifying
35
Trained at
Northwestern University Feinberg Medical School
Licensed in
FL, IL
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

6635 Hillway Cir Ste 400
Naples, FL 34112-8757
Phone: (239) 455-9550
Fax: (239) 455-8980
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 211 Waukegan Rd Ste 200, Northfield, IL 60093-2724 — (847) 242-6600

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence ME148391 (FL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036-081216 (IL)

Record details

NPI number1558420323
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 7, 2006
Last updated in NPPESJuly 12, 2021
Certification dateJune 8, 2021
Mailing address2675 Winkler Ave Fl 2, Fort Myers, FL 33901-9342

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 1991 (35 years in practice)
Group practice Millennium Physician Group Llc — 970 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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