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Dr. Gene Z. Chiao, MD
NPI1699733188
- Medicare services, 2023
- 888
- Part D claims, 2024
- 339
- Publications
- 4
- Industry payments
- $32,149
- Insurance carriers
- 14
- Practice address
- 777 Park W Ave, Highland Park, IL 60035
- Practice phone
- Call (847) 432-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Highland Park Hospital
Highland Park, Illinois
Find Dr. Chiao'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. Gene Z. Chiao is an internist in Highland Park, Illinois
Dr. Chiao practices at Highland Park Hospital in Highland Park, Illinois.
Dr. Chiao's NPI, 1699733188, was assigned on May 3, 2006. Dr. Chiao graduated from WashU Medicine in 1987. Dr. Chiao holds Illinois license 036-079891.
NPI and contact details
- NPI
- 1699733188NPI Registry (opens in a new tab)
- NPI enumeration date
- May 3, 2006
- NPI status
- Active
- Practice phone
- (847) 432-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Gene Z. Chiao practices at Highland Park Hospital in Highland Park, Illinois
Dr. Chiao's primary practice is Highland Park Hospital, at 777 Park W Ave, Highland Park, IL 60035 in Lake County. The practice phone is (847) 432-8000.
- Highland Park Hospital777 Park W Ave, Highland Park, IL 60035 · Lake CountyPhone(847) 432-8000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gene Z. Chiao is affiliated with 1 site of care
Dr. Chiao's primary practice is Highland Park Hospital in Highland Park, Illinois.
Highland Park HospitalPrimary
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Gene Z. Chiao's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chiao practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Highland Park Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gene Z. Chiao is one of 5,652 internists in Illinois
Internal medicine is Dr. Chiao's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chiao is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Dr. Chiao's licenses on file in 2 states: Illinois and Pennsylvania.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
- Pennsylvania license
Clinical focus
Dmand AI lists acid reflux, cirrhosis of the liver, colonoscopy, gastroenteritis, gastrointestinal bleeding, hemorrhoids, hepatitis c and intestinal diverticulosis among the conditions Dr. Chiao treats.
Internists near Dr. Chiao
Counts of internists 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. Gene Z. Chiao billed Medicare for 888 services in 2023
CMS data shows 888 Medicare services from Dr. Chiao across 13 procedure codes in 2023. Medicare paid $99,427 for them.
Medicare services, 2023888
Paid by Medicare$99,427
Procedure codes13
Dr. Chiao's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Surgery
- 2022: 5982023: 38436%
- Office and hospital visits
- 2022: 4772023: 33530%
- Other services
- 2022: 992023: 12728%
- Tests and treatments
- 2022: 1372023: 4269%
Where Dr. Chiao's Medicare services took place, 2023
- In an office16018%
- In a facility72882%
Dr. Chiao compared with the Illinois median for internists, 2023
- Dr. Chiao
- Illinois median
- Medicare services
- 888vs 56657% above
- Part D claims
- 229vs 28419% below
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Chiao's most billed Medicare procedure codes, 2023
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. Chiao?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chiao and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gene Z. Chiao's patients have a median age of 57
Across all payers, Dmand AI patient panel data puts Dr. Chiao's median patient age at 57, with 57% women.
Dr. Chiao's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women57%
- Men43%
Source: Dmand AI Patient Panel Data
Dr. Gene Z. Chiao wrote 339 Medicare Part D claims in 2024
In 2024, Dr. Chiao wrote 339 Medicare Part D claims for 112 patients. 87% of them were for generic drugs. CMS names the drug for 229 of them, across 8 drugs with 11 or more claims each, at $21,258 in total drug cost. In 2023, CMS named 1,268 claims across 21 drugs.
Part D claims, 2024339
Drugs named by CMS8
Total drug cost$21,258
Part D patients112
Dr. Chiao's Part D claims by kind of drug, 2024
- Generic295 claims87%
- Brand-name44 claims13%
Dr. Chiao'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,2682024: 22982%
Drugs named by CMS: 8 in 2024, 21 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
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Dr. Gene Z. Chiao has 4 publications on record
Dmand AI links 4 papers to Dr. Chiao in 2001. Dr. Chiao's most frequent co-authors are Klaus T. Gottlieb, MD and Paul Yien Kwo, MD.
Papers4
Dr. Chiao's most frequent co-authors
Recent publications by Dr. Chiao
Exp Brain Res
Biomechanical PhenomenaDeglutitionElectromyography
Zenker Diverticulum
Gastroenterology
AdenomaColonic NeoplasmsColonoscopy
See who Dr. Chiao researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chiao works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gene Z. Chiao received $32,149 in industry payments from 2016 to 2025
CMS Open Payments shows 791 general payments to Dr. Chiao from 44 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 50% of the total. Allergan Inc. paid the most, $17,217.
General payments to Dr. Chiao by program year, 2016 to 2025
General payments to Dr. Chiao by kind, 2016 to 2025
$32.1Kin total
- Food and beverage$16,00950%
- Speaker and faculty fees$15,70049%
- Education$2701%
- Travel and lodging$1340%
- Consulting fees$360%
Companies that paid Dr. Chiao 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. Gene Z. Chiao has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chiao, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Chiao
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Gene Z. Chiao graduated from WashU Medicine
Dr. Chiao graduated from WashU Medicine in 1987.
- Medical school
- Board certified in gastroenterology
Source: Dmand AI Professional Profile Data
Dr. Gene Z. Chiao accepts plans from 14 insurance carriers
Dr. Chiao is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Excellus BlueCross BlueShield
- United Healthcare
- Elevance
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- +6 more carriersWith a free account
Plan types Dr. Chiao accepts, by number of carriers
- PPO10
- HMO7
- Medicare6
- EPO5
- POS5
Source: Dmand AI Insurance Network Data
Sources for Dr. Gene Z. Chiao'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 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 Data |
| 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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Gene Z. Chiao
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. Gene Z. Chiao's NPI number?
Dr. Gene Z. Chiao's NPI number is 1699733188. It was assigned on May 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gene Z. Chiao?
Dr. Gene Z. Chiao is an internist in Highland Park, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gene Z. Chiao practice?
Dr. Chiao practices at 777 Park W Ave, Highland Park, IL 60035. Dr. Chiao's primary practice is Highland Park Hospital in Highland Park, Illinois.
What is Dr. Gene Z. Chiao's office phone number?
The practice phone on file for Dr. Chiao is (847) 432-8000.
What is Dr. Gene Z. Chiao's medical license number?
Dr. Chiao holds Illinois license 036-079891, one of the licenses on file in 2 states.
Which states has Dr. Gene Z. Chiao been licensed in?
Dmand AI has state licenses on file for Dr. Chiao in Illinois (1990 to 2026) and Pennsylvania (1989 to 1990).
Does Dr. Gene Z. Chiao accept Medicare?
Yes. CMS data shows Dr. Chiao billed Medicare for 888 services in 2023.
Is Dr. Gene Z. Chiao board certified?
Yes. Dr. Chiao is board certified in gastroenterology by the American Board of Internal Medicine.
What services does Dr. Gene Z. Chiao bill to Medicare?
In 2023, Dr. Chiao's most billed Medicare services were surgery: digestive system (45385), surgery: digestive system (45380) and hospital inpatient care (99233).
Where did Dr. Gene Z. Chiao go to medical school?
Dr. Chiao graduated from WashU Medicine in 1987.
Show 6 more questionsShow fewer questions
What drugs does Dr. Gene Z. Chiao prescribe most?
In 2024 Medicare Part D data, Dr. Chiao's most prescribed drugs by claims were Escitalopram Oxalate, Sertraline HCl and Citalopram HBr.
Has Dr. Gene Z. Chiao received payments from drug or device companies?
CMS Open Payments shows $32,149 in general payments to Dr. Chiao from 44 companies from 2016 to 2025. The largest total came from Allergan Inc.
How long has Dr. Gene Z. Chiao been practicing?
Dr. Chiao graduated from medical school in 1987, 39 years ago.
Does Dr. Gene Z. Chiao do research?
Dmand AI links 4 publications to Dr. Chiao.
Who does Dr. Gene Z. Chiao publish with?
Dr. Chiao's most frequent co-authors are Klaus T. Gottlieb, MD (1 shared paper) and Paul Yien Kwo, MD (1 shared paper).
What insurance does Dr. Gene Z. Chiao accept?
Dr. Chiao is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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