Doctor profile · Federal record
Dr. Mark Berk, M.D.
Dermatology Physician (CMS: Dermatology) · Lake Forest, IL
- NPI 1235196858
- Accepts Medicare
- 45 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
900 N Westmoreland RD, Suite 222
Lake Forest, IL 600451674
(847) 234-6121
fax (847) 482-0363
Credentials & registration
- NPI registered
- April 2006 — 20 yrs on file
- Profile last updated
- January 26, 2010
- Year of graduation
- 1981 — 45 yrs since
- Specialty taxonomy
- 207N00000X — NUCC code
- State license (1)
- Illinois #036068947
- Medicaid
- IL #036068947
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1235196858. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
6,646
Distinct HCPCS
10
Medicare allowed
$531,513
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 1,679 | 1,093 | $94 | |
17003 |
Destruction of precancer skin growth, 2-14 growths | 1,212 | 278 | $7 | |
17110 |
Destruction of skin growth, 1-14 growths | 677 | 513 | $101 | |
17000 |
Destruction of precancer skin growth, 1 growth | 633 | 455 | $48 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 354 | 253 | $132 | |
J3301 |
Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 294 | 67 | $1 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 277 | 277 | $118 | |
11301 |
Shaving of skin growth of body, arms, or legs, 0.6-1.0 cm | 188 | 150 | $99 | |
11302 |
Shaving of skin growth of body, arms, or legs, 1.1-2.0 cm | 187 | 152 | $128 | |
11311 |
Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 0.6-1.0 cm | 100 | 92 | $132 |
In context: peer comparison
Among 1 peers in Lake Forest Dermatology Physician, average services per provider: 184. This provider delivers 36× the peer median.Open Payments
Industry payments received
All-time total
$267
Transactions
8
Manufacturers
5
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Janssen Biotech, INC. | 2 | $171.99 | |
| Abbvie INC. | 2 | $30.86 | |
| E.R. Squibb & Sons, L.L.C. | 1 | $26.65 | |
| Incyte Corporation | 1 | $19.71 | |
| Strata Skin Sciences, INC. | 2 | $17.70 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,185
Patients
814
Total drug cost
$256,794
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Ketoconazole | Generic | 176 | 99 | $5,232 |
| Mupirocin | Generic | 153 | 128 | $1,542 |
| Fluticasone Propionate | Generic | 138 | 108 | $3,335 |
| Triamcinolone Acetonide | Generic | 128 | 101 | $1,951 |
| Betamethasone Dipropionate | Generic | 83 | 55 | $3,357 |
| Clobetasol Propionate | Generic | 82 | 57 | $6,724 |
| Tacrolimus | Generic | 75 | 48 | $21,117 |
| Mometasone Furoate | Generic | 73 | 62 | $1,718 |
| Dupixent Pen (Dupilumab) | Brand | 53 | 0 | $203,777 |
| Clindamycin Phosphate | Generic | 50 | 35 | $2,387 |
Frequently asked questions
What is Dr. Mark Berk's medical specialty?
Dr. Mark Berk practices Dermatology Physician in Lake Forest, IL.
Where does Dr. Mark Berk practice?
Dr. Mark Berk practices at 900 N Westmoreland RD, Lake Forest, IL 600451674. Office phone: 8472346121.
What is Dr. Mark Berk's NPI?
Dr. Mark Berk's National Provider Identifier (NPI) is 1235196858, issued by NPPES.
Does Dr. Mark Berk accept Medicare assignment?
Yes. Dr. Mark Berk accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Berk commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Destruction of precancer skin growth, 2-14 growths (HCPCS 17003); Destruction of skin growth, 1-14 growths (HCPCS 17110). Source: CMS Medicare Physician & Other Practitioners file.