Clinical CompetenceComputer-Assisted InstructionEducation, Nursing, Baccalaureate
Dr. Karen Elizabeth Chang, MD
NPI1134121189PAC ID7618073065
- Medicare services, 2024
- 1,604
- Medicare patients, 2024
- 371
- Part D claims, 2024
- 4,107
- Publications
- 1
- Hospital affiliations
- 5
- Practice address
- 2695 Rocky Mountain Ave, Loveland, CO 80538
- Practice phone
- Call (970) 624-4443
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UCHealth Medical Group
Loveland, Colorado
Find Dr. Chang's professional email, personal email and mobile number
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Dr. Karen Elizabeth Chang is an internist in Loveland, Colorado
Dr. Chang practices at UCHealth Medical Group in Loveland, Colorado.
Dr. Chang's NPI, 1134121189, was assigned on August 10, 2005. Dr. Chang graduated from University of Texas Medical School at Houston in 1991. Dr. Chang holds Colorado license DR-49665.
NPI and contact details
- NPI
- 1134121189NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618073065
- NPI enumeration date
- August 10, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (970) 624-4443
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Karen Elizabeth Chang practices at UCHealth Medical Group in Loveland, Colorado
Dr. Chang's primary practice is UCHealth Medical Group, at 2695 Rocky Mountain Ave, Loveland, CO 80538 in Larimer County. The practice phone is (970) 624-4443.
- UCHealth Medical Group2695 Rocky Mountain Ave, Loveland, CO 80538 · Larimer CountyPhone(970) 624-4443
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Karen Elizabeth Chang is affiliated with 9 sites of care and 2 medical groups
Dr. Chang's primary practice is UCHealth Medical Group in Loveland, Colorado. Dr. Chang is also affiliated with UCHealth Memorial Hospital Central. The medical group on file is UCHealth Medical Group. Dmand AI also links Dr. Chang to 4 more hospitals, 2 group practices and clinics, 1 home health agency and 1 medical group, each named with a free account.
UCHealth Medical GroupPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Karen Elizabeth Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCHealth Medical Group | Available with a free account |
| +8 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Karen Elizabeth Chang is one of 1,668 internists in Colorado
Internal medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Chang's licenses on file in 2 states: Colorado and Florida.
Specialties and state licenses
- Internal medicine, ColoradoPrimary
- Florida license
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. Karen Elizabeth Chang billed Medicare for 1,604 services in 2024
CMS data shows 1,604 Medicare services from Dr. Chang across 17 procedure codes in 2024, for 371 Medicare patients. Medicare paid $58,044 for them. Every service was in an office.
Medicare services, 20241,604
Medicare patients371
Paid by Medicare$58,044
Procedure codes17
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7042024: 7001%
- Other services
- 2023: 3892024: 58450%
- Tests and treatments
- 2023: 2862024: 18934%
- Lab and pathology
- 2023: 992024: 13132%
Dr. Chang compared with the Colorado median for internists, 2024
- Dr. Chang
- Colorado median
- Medicare services
- 1,604vs 3774.3 times
- Medicare patients
- 371vs 18699% above
- Part D claims
- 3,496vs 31811.0 times
Medians across 1,630 internists in Colorado 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 Colorado.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Karen Elizabeth Chang treated 371 Medicare patients in 2024, average age 76
CMS counts 371 Medicare patients who saw Dr. Chang in 2024. The largest group is 75 to 84, with 162 patients. 75% of them have high cholesterol, and 62% have high blood pressure. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 74, with 69% women.
Medicare patients, 2024371
Average age76
Average risk score1.09
Dr. Chang's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chang's Medicare patients by sex, 2024
- Women25669%
- Men11531%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High cholesterol75%
- High blood pressure62%
- Arthritis47%
- Ischemic heart disease29%
- Chronic kidney disease25%
- Diabetes24%
- Mood disorders23%
- Osteoporosis22%
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 74
Patient panel by sex, all payers
- Women69%
- Men30%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Karen Elizabeth Chang wrote 4,107 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 4,107 Medicare Part D claims for 404 patients. 86% of them were for generic drugs. CMS names the drug for 3,496 of them, across 80 drugs with 11 or more claims each, at $262,182 in total drug cost. In 2023, CMS named 3,334 claims across 74 drugs.
Part D claims, 20244,107
Drugs named by CMS80
Total drug cost$262,182
Part D patients404
Dr. Chang's Part D claims by kind of drug, 2024
- Generic3,528 claims86%
- Brand-name544 claims13%
- Other35 claims1%
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
- Opioids1%26 of 4,107 claims
- Antibiotics2%80 of 4,107 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: 3,3342024: 3,4965%
Drugs named by CMS: 80 in 2024, 74 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. Karen Elizabeth 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. Karen Elizabeth Chang has 1 publication on record
Dmand AI links 1 paper to Dr. Chang.
Papers1
Recent publications by Dr. Chang
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 internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Karen Elizabeth Chang received $292 in industry payments from 2016 to 2025
CMS Open Payments shows 6 general payments to Dr. Chang from 4 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Regeneron Pharmaceuticals, Inc. paid the most, $117.
General payments to Dr. Chang by program year, 2016 to 2025
Companies that paid Dr. Chang 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. Karen Elizabeth Chang graduated from University of Texas Medical School at Houston
Dr. Chang graduated from University of Texas Medical School at Houston in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Karen Elizabeth 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 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) |
| 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 Dr. Karen Elizabeth 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. Karen Elizabeth Chang's NPI number?
Dr. Karen Elizabeth Chang's NPI number is 1134121189. It was assigned on August 10, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Karen Elizabeth Chang?
Dr. Karen Elizabeth Chang is an internist in Loveland, Colorado. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Karen Elizabeth Chang practice?
Dr. Chang practices at 2695 Rocky Mountain Ave, Loveland, CO 80538. Dr. Chang's primary practice is UCHealth Medical Group in Loveland, Colorado. Dmand AI also links Dr. Chang to 4 hospitals, 2 group practices and clinics, 1 home health agency and 1 medical group.
What is Dr. Karen Elizabeth Chang's office phone number?
The practice phone on file for Dr. Chang is (970) 624-4443.
What is Dr. Karen Elizabeth Chang's medical license number?
Dr. Chang holds Colorado license DR-49665, one of the licenses on file in 2 states.
Which states has Dr. Karen Elizabeth Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in Colorado and Florida.
Which hospitals is Dr. Karen Elizabeth Chang affiliated with?
Dr. Chang is affiliated with UCHealth Memorial Hospital Central. Dmand AI links Dr. Chang to 4 more hospitals.
What medical group is Dr. Karen Elizabeth Chang part of?
Dr. Chang is linked to UCHealth Medical Group. Dmand AI links Dr. Chang to 1 more medical group.
Does Dr. Karen Elizabeth Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 1,604 services in 2024, and Dr. Chang accepts Medicare assignment.
Does Dr. Karen Elizabeth Chang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chang as offering telehealth services.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Karen Elizabeth Chang see?
CMS counts 371 Medicare patients who saw Dr. Chang in 2024, with an average age of 76.
What services does Dr. Karen Elizabeth Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and medicare service (G0439).
Where did Dr. Karen Elizabeth Chang go to medical school?
Dr. Chang graduated from University of Texas Medical School at Houston in 1991.
What drugs does Dr. Karen Elizabeth Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Atorvastatin Calcium, Rosuvastatin Calcium and Levothyroxine Sodium.
Has Dr. Karen Elizabeth Chang received payments from drug or device companies?
CMS Open Payments shows $292 in general payments to Dr. Chang from 4 companies from 2016 to 2025. The largest total came from Regeneron Pharmaceuticals, Inc.
How long has Dr. Karen Elizabeth Chang been practicing?
Dr. Chang graduated from medical school in 1991, 35 years ago.
Does Dr. Karen Elizabeth Chang do research?
Dmand AI links 1 publication to Dr. Chang.
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