Dr. Mark Allan Berk, MD
- Medicare services, 2024
- 7,078
- Medicare patients, 2024
- 1,555
- Part D claims, 2024
- 1,822
- Industry payments
- $8,673
- Affiliated sites
- 2
- Practice address
- 900 N Westmoreland Rd, Lake Forest, IL 60045
- Practice phone
- Call (312) 227-7118
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Lurie Children's Hospital Outpatient Center in Lake Forest
Lake Forest, Illinois
Find Dr. Berk's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark Allan Berk is a dermatologist in Lake Forest, Illinois
Dr. Berk practices at Lurie Children's Hospital Outpatient Center in Lake Forest in Lake Forest, Illinois.
Dr. Berk's NPI, 1235196858, was assigned on April 27, 2006. Dr. Berk holds Illinois license 036068947.
- NPI
- 1235196858NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3971562448
- NPI enumeration date
- April 27, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (312) 227-7118
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Allan Berk practices at Lurie Children's Hospital Outpatient Center in Lake Forest in Lake Forest, Illinois
Dr. Berk's primary practice is Lurie Children's Hospital Outpatient Center in Lake Forest, at 900 N Westmoreland Rd, Lake Forest, IL 60045 in Lake County. The practice phone is (312) 227-7118.
- Lurie Children's Hospital Outpatient Center in Lake Forest900 N Westmoreland Rd, Lake Forest, IL 60045 · Lake CountyPhone(312) 227-7118
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Allan Berk is affiliated with 3 sites of care and 2 medical groups
Dr. Berk's primary practice is Lurie Children's Hospital Outpatient Center in Lake Forest in Lake Forest, Illinois. The medical group on file is The Skin Care Center. Dmand AI also links Dr. Berk to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark Allan Berk's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Berk practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lurie Children's Hospital Outpatient Center in Lake Forest | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Allan Berk is one of 564 dermatologists in Illinois
Dermatology is Dr. Berk's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Berk is licensed in Illinois.
Specialties and state licenses
- Dermatology, IllinoisPrimary
Dermatologists near Dr. Berk
Counts of dermatologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark Allan Berk billed Medicare for 7,078 services in 2024
CMS data shows 7,078 Medicare services from Dr. Berk across 38 procedure codes in 2024, for 1,555 Medicare patients. Medicare paid $387,599 for them. Every service was in an office.
Dr. Berk's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 3,7282024: 3,9205%
- Office and hospital visits
- 2023: 2,4952024: 2,5874%
- Drugs given in the office
- 2023: 3142024: 45144%
- Tests and treatments
- 2023: 1092024: 12010%
Dr. Berk compared with the Illinois median for dermatologists, 2024
- Dr. Berk
- Illinois median
- Medicare services
- 7,078vs 1,7794.0 times
- Medicare patients
- 1,555vs 4913.2 times
- Part D claims
- 1,628vs 4054.0 times
Medians across 526 dermatologists in Illinois with Dmand AI profiles that report each measure.
Dr. Berk's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Berk?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Berk and other dermatologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Allan Berk treated 1,555 Medicare patients in 2024, average age 75
CMS counts 1,555 Medicare patients who saw Dr. Berk in 2024. The largest group is 65 to 74, with 763 patients. 75% of them have high cholesterol, and 63% have high blood pressure. 6% are also on Medicaid. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Berk's median patient age at 65, with 44% women.
Dr. Berk's Medicare patients by age, 2024
Dr. Berk's Medicare patients by sex, 2024
- Women70245%
- Men85355%
Chronic conditions among Dr. Berk's Medicare patients, 2024
- High cholesterol75%
- High blood pressure63%
- Arthritis42%
- Ischemic heart disease23%
- Diabetes20%
- Osteoporosis17%
- Anxiety16%
- Chronic kidney disease16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Berk's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women44%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Allan Berk wrote 1,822 Medicare Part D claims in 2024
In 2024, Dr. Berk wrote 1,822 Medicare Part D claims for 799 patients. 89% of them were for generic drugs. CMS names the drug for 1,628 of them, across 32 drugs with 11 or more claims each, at $1,001,112 in total drug cost. In 2023, CMS named 1,552 claims across 35 drugs.
Dr. Berk's Part D claims by kind of drug, 2024
- Generic1,615 claims89%
- Brand-name207 claims11%
Dr. Berk's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Berk's Part D claims, 2024
- Antibiotics7%122 of 1,822 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,5522024: 1,6285%
Drugs named by CMS: 32 in 2024, 35 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Mark Allan Berk ranks in the 98th percentile for removal of skin lesions in Medicare
Dr. Berk accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 2,309 procedures of removal of skin lesions by Dr. Berk, more than 98% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Berk ranks in Medicare procedure volume
- Removal of skin lesions
- 98th percentile2,309 procedures
- Removal or shaving of skin growth
- 97th percentile661 procedures
- Skin biopsy
- 92nd percentile342 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Mark Allan Berk received $8,673 in industry payments from 2016 to 2025
CMS Open Payments shows 347 general payments to Dr. Berk from 44 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 93% of the total. Merz North America, Inc. paid the most, $2,415.
General payments to Dr. Berk by program year, 2016 to 2025
General payments to Dr. Berk by kind, 2016 to 2025
- Food and beverage$8,09493%
- Education$5807%
Companies that paid Dr. Berk the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark Allan Berk's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark Allan Berk
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark Allan Berk's NPI number?
Dr. Mark Allan Berk's NPI number is 1235196858. It was assigned on April 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Allan Berk?
Dr. Mark Allan Berk is a dermatologist in Lake Forest, Illinois. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. Mark Allan Berk practice?
Dr. Berk practices at 900 N Westmoreland Rd, Lake Forest, IL 60045. Dr. Berk's primary practice is Lurie Children's Hospital Outpatient Center in Lake Forest in Lake Forest, Illinois. Dmand AI also links Dr. Berk to 2 group practices and clinics and 1 medical group.
What is Dr. Mark Allan Berk's office phone number?
The practice phone on file for Dr. Berk is (312) 227-7118.
What is Dr. Mark Allan Berk's medical license number?
Dr. Berk holds Illinois license 036068947.
What medical group is Dr. Mark Allan Berk part of?
Dr. Berk is linked to The Skin Care Center. Dmand AI links Dr. Berk to 1 more medical group.
Does Dr. Mark Allan Berk accept Medicare?
Yes. CMS data shows Dr. Berk billed Medicare for 7,078 services in 2024, and Dr. Berk accepts Medicare assignment.
How many Medicare patients does Dr. Mark Allan Berk see?
CMS counts 1,555 Medicare patients who saw Dr. Berk in 2024, with an average age of 75.
What services does Dr. Mark Allan Berk bill to Medicare?
In 2024, Dr. Berk's most billed Medicare services were office visit, established patient (99213), surgery: skin and soft tissue (17003) and surgery: skin and soft tissue (17000).
What drugs does Dr. Mark Allan Berk prescribe most?
In 2024 Medicare Part D data, Dr. Berk's most prescribed drugs by claims were Mupirocin, Ketoconazole and Fluticasone Propionate.
Has Dr. Mark Allan Berk received payments from drug or device companies?
CMS Open Payments shows $8,673 in general payments to Dr. Berk from 44 companies from 2016 to 2025. The largest total came from Merz North America, Inc.
How long has Dr. Mark Allan Berk been practicing?
Dr. Berk graduated from medical school in 1981, 45 years ago.
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