Dr. Jian-Jun Chen, MD, PhD
- Medicare services, 2018
- 692
- Part D claims, 2019
- 55
- Industry payments
- $1,484
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 407 S Washington Ave Ste 1 Suite 1, Titusville, FL 32796-3500
- Practice phone
- Call (321) 385-0884
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
William F Rylander
Medical specialty practice · Titusville, Florida
Find Dr. Chen'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. Jian-Jun Chen is a gastroenterologist in Titusville, Florida
Dr. Chen practices at William F Rylander in Titusville, Florida.
Dr. Chen's NPI, 1861505463, was assigned on August 16, 2006. Dr. Chen holds Florida license ME93471.
- NPI
- 1861505463NPI Registry (opens in a new tab)
- NPI enumeration date
- August 16, 2006
- NPI status
- Active
- Practice phone
- (321) 385-0884
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jian-Jun Chen practices at William F Rylander in Titusville, Florida
Dr. Chen's primary practice is William F Rylander, at 407 S Washington Ave Ste 1 Suite 1, Titusville, FL 32796-3500. The practice phone is (321) 385-0884.
- William F Rylander407 S Washington Ave Ste 1 Suite 1, Titusville, FL 32796-3500Phone(321) 385-0884
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jian-Jun Chen is affiliated with 1 site of care and 1 medical group
Dr. Chen's primary practice is William F Rylander in Titusville, Florida. Dmand AI also links Dr. Chen to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Jian-Jun Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| William F Rylander | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jian-Jun Chen is one of 1,364 gastroenterologists in Florida
Gastroenterology is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Chen is licensed in Florida.
Specialties and state licenses
- Gastroenterology, FloridaPrimary
Gastroenterologists near Dr. Chen
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
Dr. Jian-Jun Chen billed Medicare for 692 services in 2018
CMS data shows 692 Medicare services from Dr. Chen across 14 procedure codes in 2018. Medicare paid $64,262 for them.
Dr. Chen's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 1,2932018: 40269%
- Surgery
- 2017: 4232018: 25739%
- Other services
- 2017: 422018: 3321%
- Lab and pathology
- 2017: 192018: 0100%
Where Dr. Chen's Medicare services took place, 2018
- In an office25637%
- In a facility43663%
Dr. Chen compared with the Florida median for gastroenterologists, 2018
- Dr. Chen
- Florida median
- Medicare services
- 692vs 58219% above
- Part D claims
- 55vs 50289% below
Medians across 1,320 gastroenterologists in Florida with Dmand AI profiles that report each measure.
Dr. Chen's most billed Medicare procedure codes, 2018
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chen and other gastroenterologists in Florida.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jian-Jun Chen's patients have a median age of 65
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 65, with 33% women.
Dr. Chen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women33%
- Men67%
Source: Dmand AI Patient Panel Data
Dr. Jian-Jun Chen wrote 55 Medicare Part D claims in 2019
In 2019, Dr. Chen wrote 55 Medicare Part D claims. Every claim was for a generic drug. They cover 2 drugs, with $1,278 in total drug cost. In 2018, CMS named 523 claims across 15 drugs.
Dr. Chen's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 5232019: 5589%
Drugs named by CMS: 2 in 2019, 15 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Jian-Jun Chen received $1,484 in industry payments from 2016 to 2018
CMS Open Payments shows 67 general payments to Dr. Chen from 14 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $447.
General payments to Dr. Chen by program year, 2016 to 2018
Companies that paid Dr. Chen the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Jian-Jun Chen'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Jian-Jun Chen
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. Jian-Jun Chen's NPI number?
Dr. Jian-Jun Chen's NPI number is 1861505463. It was assigned on August 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jian-Jun Chen?
Dr. Jian-Jun Chen is a gastroenterologist in Titusville, Florida. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Jian-Jun Chen practice?
Dr. Chen practices at 407 S Washington Ave Ste 1 Suite 1, Titusville, FL 32796-3500. Dr. Chen's primary practice is William F Rylander in Titusville, Florida. Dmand AI also links Dr. Chen to 1 medical group.
What is Dr. Jian-Jun Chen's office phone number?
The practice phone on file for Dr. Chen is (321) 385-0884.
What is Dr. Jian-Jun Chen's medical license number?
Dr. Chen holds Florida license ME93471.
Does Dr. Jian-Jun Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 692 services in 2018.
What services does Dr. Jian-Jun Chen bill to Medicare?
In 2018, Dr. Chen's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99232) and surgery: digestive system (45380).
What drugs does Dr. Jian-Jun Chen prescribe most?
In 2019 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Omeprazole and Pantoprazole Sodium.
Has Dr. Jian-Jun Chen received payments from drug or device companies?
CMS Open Payments shows $1,484 in general payments to Dr. Chen from 14 companies from 2016 to 2018. The largest total came from Abbvie Inc.
How long has Dr. Jian-Jun Chen been practicing?
Dr. Chen's NPI was assigned in 2006.
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