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Dr. Mark S. Choh, MD
NPI1023283611PAC ID5890848626
- Medicare services, 2024
- 281
- Medicare patients, 2024
- 205
- Part D claims, 2024
- 45
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 3249 South Oak Park Avenue, Berwyn, IL 60402
- Practice phone
- Call (708) 783-9100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Choh'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 S. Choh is a general surgeon in Berwyn, Illinois
Dr. Choh practices at MacNeal Hospital in Berwyn, Illinois, part of Trinity Health.
Dr. Choh's NPI, 1023283611, was assigned on April 24, 2008. Dr. Choh graduated from Tufts University School of Medicine in 2003. Dr. Choh holds Illinois license IL 036118355.
NPI and contact details
- NPI
- 1023283611NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890848626
- NPI enumeration date
- April 24, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (708) 783-9100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark S. Choh practices at MacNeal Hospital in Berwyn, Illinois
Dr. Choh's primary practice is MacNeal Hospital, at 3249 South Oak Park Avenue, Berwyn, IL 60402 in Cook County. The practice phone is (708) 783-9100.
- MacNeal Hospital3249 South Oak Park Avenue, Berwyn, IL 60402 · Cook CountyPhone(708) 783-9100
Source: Dmand AI Affiliation Data
Dr. Mark S. Choh is affiliated with 5 sites of care and 3 medical groups
Dr. Choh's primary practice is MacNeal Hospital in Berwyn, Illinois, part of Trinity Health. Dr. Choh is also affiliated with Loyola University Medical Center. The medical group on file is Loyola Medical Group. Dmand AI also links Dr. Choh to 3 more group practices and clinics and 2 medical groups, each named with a free account.
Loyola University Medical CenterLoyola Medical Group3 group practices and clinicsNames with a free account2 medical groupsNames with a free account
See all 8 affiliations for Dr. ChohSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark S. Choh's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Choh practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MacNeal Hospital | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Mark S. Choh is one of 1,217 general surgeons in Illinois
Surgery is Dr. Choh's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Choh is licensed in Illinois.
Specialties and state licenses
- Surgery, IllinoisPrimary
General surgeons near Dr. Choh
Counts of general surgeons 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 S. Choh billed Medicare for 281 services in 2024
CMS data shows 281 Medicare services from Dr. Choh across 7 procedure codes in 2024, for 205 Medicare patients. Medicare paid $18,839 for them.
Medicare services, 2024281
Medicare patients205
Paid by Medicare$18,839
Procedure codes7
Dr. Choh's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2772024: 2811%
Where Dr. Choh's Medicare services took place, 2024
- In an office3211%
- In a facility24989%
Dr. Choh compared with the Illinois median for general surgeons, 2024
- Dr. Choh
- Illinois median
- Medicare services
- 281vs 19445% above
- Medicare patients
- 205vs 14442% above
- Part D claims
- 23vs 2818% below
Medians across 1,031 general surgeons in Illinois with Dmand AI profiles that report each measure.
Dr. Choh'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. Choh?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Choh and other general surgeons in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark S. Choh treated 205 Medicare patients in 2024, average age 75
CMS counts 205 Medicare patients who saw Dr. Choh in 2024. The largest group is 65 to 74, with 74 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 27% are also on Medicaid. Their average risk score is 2.09, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Choh's median patient age at 67, with 49% women.
Medicare patients, 2024205
Average age75
Average risk score2.09
Also on Medicaid27%
Dr. Choh's Medicare patients by age, 2024
Dr. Choh's Medicare patients by sex, 2024
- Women11154%
- Men9446%
Chronic conditions among Dr. Choh's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Ischemic heart disease47%
- Anxiety42%
- Diabetes42%
- Chronic kidney disease40%
- Mood disorders36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Choh's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women49%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark S. Choh wrote 45 Medicare Part D claims in 2024
In 2024, Dr. Choh wrote 45 Medicare Part D claims for 26 patients. 93% of them were for generic drugs. CMS names the drug for 23 of them, across 2 drugs with 11 or more claims each, at $74 in total drug cost. In 2018, CMS named 16 claims across 1 drug.
Part D claims, 202445
Drugs named by CMS2
Total drug cost$74
Part D patients26
Dr. Choh's Part D claims by kind of drug, 2024
- Generic42 claims93%
- Brand-name and other3 claims7%
Dr. Choh'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. Choh's Part D claims, 2024
- Opioids38%17 of 45 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, 2018 to 2024
- 2018
- 2024
- Claims for drugs CMS names
- 2018: 162024: 2344%
Drugs named by CMS: 2 in 2024, 1 in 2018.
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
How Dr. Mark S. Choh takes part in Medicare
Dr. Choh accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 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 S. Choh has 1 publication on record
Dmand AI links 1 paper to Dr. Choh. Dr. Choh's most frequent co-author is Carlos A. Galvani, MD.
Papers1
Dr. Choh's most frequent co-authors
Recent publications by Dr. Choh
See who Dr. Choh researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Choh works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark S. Choh received $5,512 in industry payments from 2016 to 2025
CMS Open Payments shows 185 general payments to Dr. Choh from 37 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 90% of the total. Medtronic, Inc. paid the most, $657.
General payments to Dr. Choh by program year, 2016 to 2025
General payments to Dr. Choh by kind, 2016 to 2025
$5.5Kin total
- Food and beverage$4,94790%
- Consulting fees$56510%
Companies that paid Dr. Choh the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark S. Choh graduated from Tufts University School of Medicine
Dr. Choh graduated from Tufts University School of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark S. Choh'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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 S. Choh
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 S. Choh's NPI number?
Dr. Mark S. Choh's NPI number is 1023283611. It was assigned on April 24, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark S. Choh?
Dr. Mark S. Choh is a general surgeon in Berwyn, Illinois. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Mark S. Choh practice?
Dr. Choh practices at 3249 South Oak Park Avenue, Berwyn, IL 60402. Dr. Choh's primary practice is MacNeal Hospital in Berwyn, Illinois, part of Trinity Health. Dmand AI also links Dr. Choh to 3 group practices and clinics and 2 medical groups.
What is Dr. Mark S. Choh's office phone number?
The practice phone on file for Dr. Choh is (708) 783-9100.
What is Dr. Mark S. Choh's medical license number?
Dr. Choh holds Illinois license IL 036118355.
Which hospitals is Dr. Mark S. Choh affiliated with?
Dr. Choh practices at MacNeal Hospital in Berwyn, Illinois. Dr. Choh is also affiliated with Loyola University Medical Center.
What medical group is Dr. Mark S. Choh part of?
Dr. Choh is linked to Loyola Medical Group. Dmand AI links Dr. Choh to 2 more medical groups.
Does Dr. Mark S. Choh accept Medicare?
Yes. CMS data shows Dr. Choh billed Medicare for 281 services in 2024, and Dr. Choh accepts Medicare assignment.
How many Medicare patients does Dr. Mark S. Choh see?
CMS counts 205 Medicare patients who saw Dr. Choh in 2024, with an average age of 75.
What services does Dr. Mark S. Choh bill to Medicare?
In 2024, Dr. Choh's most billed Medicare services were hospital inpatient care (99231), hospital inpatient care (99232) and hospital inpatient care (99222).
Show 6 more questionsShow fewer questions
Where did Dr. Mark S. Choh go to medical school?
Dr. Choh graduated from Tufts University School of Medicine in 2003.
What drugs does Dr. Mark S. Choh prescribe most?
In 2024 Medicare Part D data, Dr. Choh's most prescribed drugs by claims were Hydrocodone-Acetaminophen and Pantoprazole Sodium.
Has Dr. Mark S. Choh received payments from drug or device companies?
CMS Open Payments shows $5,512 in general payments to Dr. Choh from 37 companies from 2016 to 2025. The largest total came from Medtronic, Inc.
How long has Dr. Mark S. Choh been practicing?
Dr. Choh graduated from medical school in 2003, 23 years ago.
Does Dr. Mark S. Choh do research?
Dmand AI links 1 publication to Dr. Choh.
Who does Dr. Mark S. Choh publish with?
Dr. Choh's most frequent co-authors are Carlos A. Galvani, MD (1 shared paper).
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