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

Dr. Mark Allan Berk, MD

Individual provider Dermatology Physician · NPI 1235196858

Dr. Mark Allan Berk, MD is a Dermatology in Lake Forest, Illinois. Qualified in 1981, 45 years ago. Practices with Dermatologists of Illinois, PLLC, a 12-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
45
Licensed in
IL
In the registry since
2006
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

900 N Westmoreland Rd Ste 222
Lake Forest, IL 60045-1674
Phone: (847) 234-6121
Fax: (847) 482-0363
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence 036068947 (IL)

Record details

NPI number1235196858
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 27, 2006
Last updated in NPPESJanuary 26, 2010

Medicare enrollment

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

Medicare specialtyDERMATOLOGY
Medical schoolOTHER
Graduated 1981 (45 years in practice)
Group practice Dermatologists Of Illinois, Pllc — 12 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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