James Steven Marks, M.D.
Psychiatry Physician · Vernon Hills, IL
James Steven Marks, M.D. is a psychiatry physician with a practice address in Vernon Hills, Illinois, and NPI 1841305018, issued on Aug 20, 2006. Check the license (Illinois 036-080975, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- James Steven Marks
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 036-080975 IL
Self-reported in NPPES; status is on the state search - Practice location
- 977 Lakeview Pkwy, Vernon Hills, IL 60061
- Phone
- (847) 367-1611
- Enumerated
- Aug 20, 2006
- Record last updated
- Oct 21, 2025
- Fax
- (847) 367-4079
- Medicare enrollment
- Enrolled (PECOS I20050411000789); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,147 in Illinois → Look up another NPI →
Also registered at 977 Lakeview Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joan AjidePsychiatric/Mental Health Nurse Practitioner1013512243
- Catherine Arce, PH.D.Clinical Psychologist1023158243
- Aleth Bisco, P.T.Physical Therapist1427220722
- Richard Bolnick, PSYDClinical Psychologist1164402798
- Michael Bourbon, LCSWClinical Social Worker1316012537
- Richard EgbertMental Health Counselor1336639673
Verify James Steven Marks in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-080975Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average psychiatry physician in 2024
2,820 Medicare Part D claims for 213 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Bupropion Xl320 claims
- Sertraline Hcl219 claims
- Trazodone Hcl188 claims
- Escitalopram Oxalate178 claims
- Buspirone Hcl166 claims
- Fluoxetine Hcl151 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $2,167.56
4 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Neuropsychiatric Associates OF IL SCVernon Hills, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Steven Marks among 2,147 psychiatry physician records in Illinois
James Steven Marks, M.D. is one of 2,147 psychiatry physician records with a practice address in Illinois. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 65% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 41% of these records are
- Graduated1988 · median 2004 among the 877 with a school on file
- Record last updated2025 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Illinois
There are 2,147 psychiatry physician records in Illinois.
All 2,147 in Illinois → Every provider in Vernon Hills → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Sarah Alam, MDVernon Hills, IL 600611497332654
- Robert Fabsik, D.O.Vernon Hills, IL 600611255461802
- Elena Frankfurt, M.D.Vernon Hills, IL 600611184792749
- Stephen Galston, M.DVernon Hills, IL 600611508939471
- Jeremy Kaplan, M.D.Vernon Hills, IL 600611053451682
- Ali Khoshkish, MDVernon Hills, IL 600611205496197
- Steven Lammers, M.D.Vernon Hills, IL 600611184600462
- Dustin PilatVernon Hills, IL 600611467080523
Common questions
What is James Steven Marks, M.D.'s NPI number?
James Steven Marks, M.D.'s National Provider Identifier (NPI) is 1841305018, issued on Aug 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Steven Marks, M.D. located?
The NPPES record lists a practice address at 977 Lakeview Pkwy, Vernon Hills, IL, 60061. Phone: (847) 367-1611. Providers update this record themselves, so call before visiting.
How can I verify James Steven Marks, M.D.'s license?
NPPES lists Illinois license number 036-080975, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Steven Marks, M.D. prescribe under Medicare Part D?
In 2024, James Steven Marks, M.D. had 2,820 Medicare Part D claims for 213 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.