Chromosome MappingChromosomes, Human, Pair 8Genes, Tumor Suppressor
Dr. James J. Chang, MD
NPI1306924105PAC ID0446433684
- Medicare patients, 2024
- 18
- Part D claims, 2024
- 1,126
- Publications
- 9
- Hospital affiliations
- 1
- Industry payments
- $325
- Practice address
- 901 Nevin Ave, Richmond, CA 94801
- Practice phone
- Call (510) 307-1555
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Richmond Medical Center
Richmond, California
Find Dr. Chang'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. James J. Chang is a urologist in Richmond, California
Dr. Chang practices at Richmond Medical Center in Richmond, California.
Dr. Chang's NPI, 1306924105, was assigned on November 1, 2006. Dr. Chang graduated from UC Davis School of Medicine in 1993. Dr. Chang holds California license G80347.
NPI and contact details
- NPI
- 1306924105NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0446433684
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (510) 307-1555
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James J. Chang practices at Richmond Medical Center in Richmond, California
Dr. Chang's primary practice is Richmond Medical Center, at 901 Nevin Ave, Richmond, CA 94801 in Contra Costa County. The practice phone is (510) 307-1555.
- Richmond Medical Center901 Nevin Ave, Richmond, CA 94801 · Contra Costa CountyPhone(510) 307-1555
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. James J. Chang is affiliated with 2 sites of care and 1 medical group
Dr. Chang's primary practice is Richmond Medical Center in Richmond, California. Dr. Chang is also affiliated with Oakland Medical Center. The medical group on file is The Permanente Medical Group, Inc.
Richmond Medical CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James J. Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Richmond Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James J. Chang is one of 1,395 urologists in California
Urology is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Chang is board certified in urology by the American Board of Urology. Dr. Chang is licensed in California.
Specialties and state licenses
- Urology, CaliforniaPrimary
Urologists near Dr. Chang
Counts of urologists 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. James J. Chang treated 18 Medicare patients in 2024, average age 71
CMS counts 18 Medicare patients who saw Dr. Chang in 2024. 67% of them have high blood pressure. Their average risk score is 2.71, 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. Chang's median patient age at 70, with 24% women.
Medicare patients, 202418
Average age71
Average risk score2.71
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High blood pressure67%
Share of Medicare patients with each condition. A patient can have several.
Dr. 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 70
Patient panel by sex, all payers
- Women24%
- Men74%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James J. Chang wrote 1,126 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 1,126 Medicare Part D claims for 405 patients. 95% of them were for generic drugs. CMS names the drug for 1,002 of them, across 19 drugs with 11 or more claims each, at $43,884 in total drug cost. In 2023, CMS named 946 claims across 19 drugs.
Part D claims, 20241,126
Drugs named by CMS19
Total drug cost$43,884
Part D patients405
Dr. Chang's Part D claims by kind of drug, 2024
- Generic1,069 claims95%
- Brand-name37 claims3%
- Other20 claims2%
Dr. 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.
Drug classes CMS tracks in Dr. Chang's Part D claims, 2024
- Antibiotics22%244 of 1,126 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9462024: 1,0026%
Drugs named by CMS: 19 in 2024, 19 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
Dr. James J. Chang offers telehealth to Medicare patients
Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chang as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. James J. Chang has 9 publications on record
Dmand AI links 9 papers to Dr. Chang. The most frequent topics are Prostatic Neoplasms, Genes, Tumor Suppressor and Loss of Heterozygosity. Dr. Chang has published most often in J Urol. Dr. Chang's most frequent co-authors are Peter R. Carroll, MD, Joseph H. Franks, MD and Brian P. Grady, MD.
Papers9
Topics Dr. Chang writes about most
- Prostatic Neoplasms
- Genes, Tumor Suppressor
- Loss of Heterozygosity
- Prostatectomy
- Biopsy
- Chromosome Mapping
- Chromosomes, Human, Pair 9
- Kidney Neoplasms
Dr. Chang's most frequent co-authors
- Peter R. Carroll, MD4 shared papers
- Joseph H. Franks, MD1 shared paper
- Brian P. Grady, MD1 shared paper
Recent publications by Dr. Chang
Chromosomes, Human, Pair 9Genes, Tumor SuppressorGenetic Markers
J Urol
Carcinoma, Squamous CellHypercalcemiaHyperparathyroidism
See who Dr. Chang researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chang works with, so you can find a warm path to the right urologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. James J. Chang received $325 in industry payments from 2017 to 2023
CMS Open Payments shows 5 general payments to Dr. Chang from 5 drug and device companies from 2017 to 2023. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $131.
General payments to Dr. Chang by program year, 2017 to 2023
Companies that paid Dr. Chang the most, 2017 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James J. Chang has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chang, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Chang
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. James J. Chang graduated from UC Davis School of Medicine
Dr. Chang graduated from UC Davis School of Medicine in 1993.
- Medical school
- Board certified in urology
Source: Dmand AI Professional Profile Data
Dr. James J. Chang accepts plans from 2 insurance carriers
Dr. Chang is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Chang accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. James J. 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 | 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 DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| 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) |
| 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. James J. 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 Dr. James J. Chang's NPI number?
Dr. James J. Chang's NPI number is 1306924105. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James J. Chang?
Dr. James J. Chang is a urologist in Richmond, California. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. James J. Chang practice?
Dr. Chang practices at 901 Nevin Ave, Richmond, CA 94801. Dr. Chang's primary practice is Richmond Medical Center in Richmond, California.
What is Dr. James J. Chang's office phone number?
The practice phone on file for Dr. Chang is (510) 307-1555.
What is Dr. James J. Chang's medical license number?
Dr. Chang holds California license G80347.
Which hospitals is Dr. James J. Chang affiliated with?
Dr. Chang is affiliated with Oakland Medical Center.
What medical group is Dr. James J. Chang part of?
Dr. Chang is linked to The Permanente Medical Group, Inc.
Does Dr. James J. Chang accept Medicare?
Yes. CMS lists Dr. Chang as accepting Medicare assignment.
Does Dr. James J. Chang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chang as offering telehealth services.
How many Medicare patients does Dr. James J. Chang see?
CMS counts 18 Medicare patients who saw Dr. Chang in 2024, with an average age of 71.
Show 8 more questionsShow fewer questions
Is Dr. James J. Chang board certified?
Yes. Dr. Chang is board certified in urology by the American Board of Urology.
Where did Dr. James J. Chang go to medical school?
Dr. Chang graduated from UC Davis School of Medicine in 1993.
What drugs does Dr. James J. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Tamsulosin HCl, Finasteride and Ciprofloxacin HCl.
Has Dr. James J. Chang received payments from drug or device companies?
CMS Open Payments shows $325 in general payments to Dr. Chang from 5 companies from 2017 to 2023. The largest total came from Allergan Inc.
How long has Dr. James J. Chang been practicing?
Dr. Chang graduated from medical school in 1993, 33 years ago.
Does Dr. James J. Chang do research?
Dmand AI links 9 publications to Dr. Chang.
Who does Dr. James J. Chang publish with?
Dr. Chang's most frequent co-authors are Peter R. Carroll, MD (4 shared papers), Joseph H. Franks, MD (1 shared paper) and Brian P. Grady, MD (1 shared paper).
What insurance does Dr. James J. Chang accept?
Dr. Chang is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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