Dig Dis Sci
Carcinoma, HepatocellularLiver CirrhosisLiver Neoplasms
Christopher Chang
NPI1508398413PAC ID2961811542
- Medicare services, 2024
- 107
- Medicare patients, 2024
- 72
- Part D claims, 2024
- 56
- Publications
- 10
- Hospital affiliations
- 2
- Practice address
- 1330 S Valley View Blvd, Las Vegas, NV 89102
- Practice phone
- Call (702) 675-4600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Valley View Surgery Center
Surgery Center - Not Medicare-Certified · Las Vegas, Nevada
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Christopher Chang is a gastroenterologist in Las Vegas, Nevada
Christopher Chang practices at Valley View Surgery Center in Las Vegas, Nevada.
Christopher Chang's NPI, 1508398413, was assigned on March 30, 2017. Christopher Chang graduated from Indiana University School of Medicine in 2017. Christopher Chang holds Nevada license 25181.
NPI and contact details
- NPI
- 1508398413NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961811542
- NPI enumeration date
- March 30, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (702) 675-4600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Christopher Chang practices at Valley View Surgery Center in Las Vegas, Nevada
Christopher Chang's primary practice is Valley View Surgery Center, at 1330 S Valley View Blvd, Las Vegas, NV 89102. The practice phone is (702) 675-4600.
- Valley View Surgery Center1330 S Valley View Blvd, Las Vegas, NV 89102Phone(702) 675-4600
Source: Dmand AI Affiliation Data
Christopher Chang is affiliated with 4 sites of care and 1 medical group
Christopher Chang's primary practice is Valley View Surgery Center in Las Vegas, Nevada. Christopher Chang is also affiliated with Summerlin Hospital Medical Center. The medical group on file is Vegas Gastroenterology. Dmand AI also links Christopher Chang to 1 more hospital and 1 group practice or clinic, each named with a free account.
Valley View Surgery CenterPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Christopher Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Christopher Chang practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Valley View Surgery Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Christopher Chang is one of 107 gastroenterologists in Nevada
Gastroenterology is Christopher Chang's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Christopher Chang is licensed in Nevada.
Specialties and state licenses
- Gastroenterology, NevadaPrimary
Gastroenterologists near Christopher Chang
Counts of gastroenterologists 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
Christopher Chang billed Medicare for 107 services in 2024
CMS data shows 107 Medicare services from Christopher Chang across 4 procedure codes in 2024, for 72 Medicare patients. Medicare paid $12,018 for them.
Medicare services, 2024107
Medicare patients72
Paid by Medicare$12,018
Procedure codes4
Christopher Chang's Medicare services by type, 2024
- Surgery80
- Office and hospital visits27
Where Christopher Chang's Medicare services took place, 2024
- In an office2725%
- In a facility8075%
Christopher Chang compared with the Nevada median for gastroenterologists, 2024
- Christopher Chang
- Nevada median
- Medicare services
- 107vs 75886% below
- Medicare patients
- 72vs 40082% below
- Part D claims
- 29vs 59495% below
Medians across 106 gastroenterologists in Nevada with Dmand AI profiles that report each measure.
Christopher Chang'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 Christopher Chang?
Medicare shows one payer. Book a meeting to get commercial claims data for Christopher Chang and other gastroenterologists in Nevada.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Christopher Chang treated 72 Medicare patients in 2024, average age 72
CMS counts 72 Medicare patients who saw Christopher Chang in 2024. The largest group is 65 to 74, with 41 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 35% are also on Medicaid. Their average risk score is 1.08, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Christopher Chang's median patient age at 56, with 55% women.
Medicare patients, 202472
Average age72
Average risk score1.08
Also on Medicaid35%
Christopher Chang's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Christopher Chang's Medicare patients by sex, 2024
- Women4157%
- Men3143%
Chronic conditions among Christopher Chang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol74%
- Diabetes43%
- Arthritis38%
- Chronic kidney disease25%
- Ischemic heart disease25%
- Heart failure18%
- Anxiety17%
Share of Medicare patients with each condition. A patient can have several.
Christopher Chang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Christopher Chang wrote 56 Medicare Part D claims in 2024
In 2024, Christopher Chang wrote 56 Medicare Part D claims for 34 patients. 91% of them were for generic drugs. CMS names the drug for 29 of them, across 2 drugs with 11 or more claims each, at $295 in total drug cost.
Part D claims, 202456
Drugs named by CMS2
Total drug cost$295
Part D patients34
Christopher Chang's Part D claims by kind of drug, 2024
- Generic51 claims91%
- Brand-name and other5 claims9%
Christopher Chang'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.
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
Christopher Chang ranks in the 75th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Christopher Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 92 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Christopher Chang, more than 75% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Christopher Chang ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 75th percentile92 procedures
- Colonoscopy
- 67th percentile59 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Christopher Chang has 10 publications on record
Dmand AI links 10 papers to Christopher Chang, published from 2011 to 2021. 2016 was the busiest year, with 2. The most frequent topics are Constipation and Irritable Bowel Syndrome. Christopher Chang has published most often in Am J Gastroenterol. Christopher Chang's most frequent co-authors are Christopher Han Sheng Chang, MD, PhD, Mark Pimentel, MD and Christopher C. Chang, MD.
Papers10
Years published2011 to 2021
Christopher Chang's papers by year, 2011 to 2021
Topics Christopher Chang writes about most
- Constipation
- Irritable Bowel Syndrome
Christopher Chang's most frequent co-authors
- Christopher Han Sheng Chang, MD, PhD6 shared papers
- Mark Pimentel, MD4 shared papers
- Christopher C. Chang, MD3 shared papers
Recent publications by Christopher Chang
Best Pract Res Clin Gastroenterol
DietDysbiosisGastrointestinal Diseases
Gastrointest Endosc
Colonic NeoplasmsColonoscopyEar Neoplasms
Antineoplastic AgentsBiopsyCarcinoma, Small Cell
See who Christopher Chang researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Christopher Chang works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Christopher Chang received $1,373 in industry payments from 2024 to 2025
CMS Open Payments shows 48 general payments to Christopher Chang from 14 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $685.
General payments to Christopher Chang by program year, 2024 to 2025
Companies that paid Christopher Chang the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Christopher Chang graduated from Indiana University School of Medicine
Christopher Chang graduated from Indiana University School of Medicine in 2017.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Christopher Chang'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 Christopher Chang
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Christopher Chang's NPI number?
Christopher Chang's NPI number is 1508398413. It was assigned on March 30, 2017, and it is active in the NPI Registry.
What does Christopher Chang specialize in?
Christopher Chang is a gastroenterologist in Las Vegas, Nevada. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Christopher Chang practice?
Christopher Chang practices at 1330 S Valley View Blvd, Las Vegas, NV 89102. Christopher Chang's primary practice is Valley View Surgery Center in Las Vegas, Nevada. Dmand AI also links Christopher Chang to 1 hospital and 1 group practice or clinic.
What is Christopher Chang's office phone number?
The practice phone on file for Christopher Chang is (702) 675-4600.
What is Christopher Chang's medical license number?
Christopher Chang holds Nevada license 25181.
Which hospitals is Christopher Chang affiliated with?
Christopher Chang is affiliated with Summerlin Hospital Medical Center. Dmand AI links Christopher Chang to 1 more hospital.
What medical group is Christopher Chang part of?
Christopher Chang is linked to Vegas Gastroenterology.
Does Christopher Chang accept Medicare?
Yes. CMS data shows Christopher Chang billed Medicare for 107 services in 2024, and Christopher Chang accepts Medicare assignment.
How many Medicare patients does Christopher Chang see?
CMS counts 72 Medicare patients who saw Christopher Chang in 2024, with an average age of 72.
What services does Christopher Chang bill to Medicare?
In 2024, Christopher Chang's most billed Medicare services were surgery: digestive system (43239), office visit, new patient (99204) and surgery: digestive system (45380).
Show 6 more questionsShow fewer questions
Where did Christopher Chang go to medical school?
Christopher Chang graduated from Indiana University School of Medicine in 2017.
What drugs does Christopher Chang prescribe most?
In 2024 Medicare Part D data, Christopher Chang's most prescribed drugs by claims were Omeprazole and Gavilyte-G.
Has Christopher Chang received payments from drug or device companies?
CMS Open Payments shows $1,373 in general payments to Christopher Chang from 14 companies from 2024 to 2025. The largest total came from Abbvie Inc.
How long has Christopher Chang been practicing?
Christopher Chang graduated from medical school in 2017, 9 years ago.
Does Christopher Chang do research?
Dmand AI links 10 publications to Christopher Chang, published from 2011 to 2021.
Who does Christopher Chang publish with?
Christopher Chang's most frequent co-authors are Christopher Han Sheng Chang, MD, PhD (6 shared papers), Mark Pimentel, MD (4 shared papers) and Christopher C. Chang, MD (3 shared papers).
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