Dr. Daniel H. Chang, MD, MS
- Medicare services, 2024
- 482
- Medicare patients, 2024
- 157
- Part D claims, 2024
- 266
- Hospital affiliations
- 1
- Industry payments
- $150
- Practice address
- 400 North Pepper Avenue, Colton, CA 92324
- Practice phone
- Call (909) 580-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chang's professional email, personal email and mobile number
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Dr. Daniel H. Chang is an internist in Colton, California
Dr. Chang practices at Arrowhead Regional Medical Center in Colton, California, part of San Bernardino County.
Dr. Chang's NPI, 1568993665, was assigned on March 21, 2017. Dr. Chang graduated from St. George's University School of Medicine in 2017. Dr. Chang's California license number on file is A166287.
- NPI
- 1568993665NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406275957
- NPI enumeration date
- March 21, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 580-1000
- 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)
Dr. Daniel H. Chang practices at Arrowhead Regional Medical Center in Colton, California
Dr. Chang's primary practice is Arrowhead Regional Medical Center, at 400 North Pepper Avenue, Colton, CA 92324 in San Bernardino County. The practice phone is (909) 580-1000.
- Arrowhead Regional Medical Center400 North Pepper Avenue, Colton, CA 92324 · San Bernardino CountyPhone(909) 580-1000
Source: Dmand AI Affiliation Data
Dr. Daniel H. Chang is affiliated with 1 site of care and 2 medical groups
Dr. Chang's primary practice is Arrowhead Regional Medical Center in Colton, California, part of San Bernardino County. The medical group on file is Quantum Healthcare Medical Associates Inc. Dmand AI also links Dr. Chang to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Daniel H. 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 |
|---|---|
| Arrowhead Regional Medical Center | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Daniel H. Chang is one of 16,751 internists in California
Internal medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chang is board certified in internal medicine by the American Board of Internal Medicine. Dr. Chang has a license on file in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists chest pain, gastrointestinal bleeding, gastrointestinal obstruction, inflammatory bowel disease (IBD), kidney failure, lung disease: COPD, asthma or bronchitis, mini-stroke (TIA) and non-surgical back problems among the conditions Dr. Chang treats.
Internists near Dr. Chang
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. Daniel H. Chang billed Medicare for 482 services in 2024
CMS data shows 482 Medicare services from Dr. Chang across 4 procedure codes in 2024, for 157 Medicare patients. Medicare paid $36,783 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4682024: 4823%
Dr. Chang compared with the California median for internists, 2024
- Dr. Chang
- California median
- Medicare services
- 482vs 36134% above
- Medicare patients
- 157vs 151Close to median
- Part D claims
- 41vs 42190% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. 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 Dr. Chang?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chang and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Daniel H. Chang treated 157 Medicare patients in 2024, average age 71
CMS counts 157 Medicare patients who saw Dr. Chang in 2024. The largest group is 65 to 74, with 62 patients. 75% of them have high blood pressure, and 72% have high cholesterol. 76% are also on Medicaid. Their average risk score is 3.44, 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 65, with 48% women.
Dr. Chang's Medicare patients by age, 2024
Dr. Chang's Medicare patients by sex, 2024
- Women7950%
- Men7850%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Diabetes57%
- Chronic kidney disease52%
- Heart failure52%
- Arthritis46%
- Ischemic heart disease42%
- Mood disorders39%
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 65
Patient panel by sex, all payers
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Daniel H. Chang wrote 266 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 266 Medicare Part D claims for 99 patients. 80% of them were for generic drugs. CMS names the drug for 41 of them, across 3 drugs with 11 or more claims each, at $722 in total drug cost. In 2023, CMS named 13 claims across 1 drug.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic214 claims80%
- Brand-name and other52 claims20%
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
- Opioids5%13 of 266 claims
- Antibiotics18%48 of 266 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: 132024: 41215%
Drugs named by CMS: 3 in 2024, 1 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
How Dr. Daniel H. Chang takes part in Medicare
Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Daniel H. Chang received $150 in industry payments from 2018 to 2023
CMS Open Payments shows 6 general payments to Dr. Chang from 4 drug and device companies from 2018 to 2023. Food and beverage make up the largest share, 84% of the total. Abbvie Inc. paid the most, $58.
General payments to Dr. Chang by program year, 2018 to 2023
General payments to Dr. Chang by kind, 2018 to 2023
- Food and beverage$12684%
- Speaker and faculty fees$2416%
Companies that paid Dr. Chang the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Daniel H. Chang graduated from St. George's University School of Medicine
Dr. Chang graduated from St. George's University School of Medicine in 2017.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Daniel H. Chang accepts plans from 1 insurance carrier
Dr. Chang is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Daniel H. 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Daniel H. 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. Daniel H. Chang's NPI number?
Dr. Daniel H. Chang's NPI number is 1568993665. It was assigned on March 21, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel H. Chang?
Dr. Daniel H. Chang is an internist in Colton, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Daniel H. Chang practice?
Dr. Chang practices at 400 North Pepper Avenue, Colton, CA 92324. Dr. Chang's primary practice is Arrowhead Regional Medical Center in Colton, California, part of San Bernardino County. Dmand AI also links Dr. Chang to 1 medical group.
What is Dr. Daniel H. Chang's office phone number?
The practice phone on file for Dr. Chang is (909) 580-1000.
What is Dr. Daniel H. Chang's medical license number?
Dr. Chang's California license number on file is A166287.
Which hospitals is Dr. Daniel H. Chang affiliated with?
Dr. Chang practices at Arrowhead Regional Medical Center in Colton, California.
What medical group is Dr. Daniel H. Chang part of?
Dr. Chang is linked to Quantum Healthcare Medical Associates Inc. Dmand AI links Dr. Chang to 1 more medical group.
Does Dr. Daniel H. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 482 services in 2024, and Dr. Chang accepts Medicare assignment.
How many Medicare patients does Dr. Daniel H. Chang see?
CMS counts 157 Medicare patients who saw Dr. Chang in 2024, with an average age of 71.
Is Dr. Daniel H. Chang board certified?
Yes. Dr. Chang is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Daniel H. Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99239) and hospital inpatient care (99233).
Where did Dr. Daniel H. Chang go to medical school?
Dr. Chang graduated from St. George's University School of Medicine in 2017.
What drugs does Dr. Daniel H. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Pantoprazole Sodium, Nifedipine ER and Lantus.
Has Dr. Daniel H. Chang received payments from drug or device companies?
CMS Open Payments shows $150 in general payments to Dr. Chang from 4 companies from 2018 to 2023. The largest total came from Abbvie Inc.
How long has Dr. Daniel H. Chang been practicing?
Dr. Chang graduated from medical school in 2017, 9 years ago.
What insurance does Dr. Daniel H. Chang accept?
Dr. Chang is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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