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
Mailing address900 N Westmoreland Rd, Suite 222, Lake Forest, IL 60045-1674

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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