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Dr. Ann Celine Chang, MD
NPI1457390247
- Medicare services, 2017
- 268
- Part D claims, 2020
- 67
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $66
- Practice address
- 2121 North Ave, Grand Junction, CO 81501
- Practice phone
- Call (913) 578-4409
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Grand Junction VA Medical Center
VA Clinic / Health Facility · Grand Junction, Colorado
Find Dr. Chang's professional email, personal email and mobile number
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Dr. Ann Celine Chang is an internist in Grand Junction, Colorado
Dr. Chang practices at Grand Junction VA Medical Center in Grand Junction, Colorado.
Dr. Chang's NPI, 1457390247, was assigned on June 6, 2006. Dr. Chang holds Virginia license 0101058527.
NPI and contact details
- NPI
- 1457390247NPI Registry (opens in a new tab)
- NPI enumeration date
- June 6, 2006
- NPI status
- Active
- Practice phone
- (913) 578-4409
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Ann Celine Chang practices at Grand Junction VA Medical Center in Grand Junction, Colorado
Dr. Chang's primary practice is Grand Junction VA Medical Center, at 2121 North Ave, Grand Junction, CO 81501. The practice phone is (913) 578-4409.
- Grand Junction VA Medical Center2121 North Ave, Grand Junction, CO 81501Phone(913) 578-4409
Source: Dmand AI Affiliation Data
Dr. Ann Celine Chang is affiliated with 2 sites of care and 3 medical groups
Dr. Chang's primary practice is Grand Junction VA Medical Center in Grand Junction, Colorado. Dr. Chang is also affiliated with Greeneville Community Hospital. The medical group on file is Southeastern Emergency Physicians. Dmand AI also links Dr. Chang to 2 more medical groups, each named with a free account. Dr. Chang's employer is on file too: a government & correctional health.
Grand Junction VA Medical CenterPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ann Celine Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Grand Junction VA Medical Center | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ann Celine 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: Virginia and Tennessee.
Specialties and state licenses
- Internal medicine, VirginiaPrimary
- Emergency medicine, Tennessee
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. Ann Celine Chang billed Medicare for 268 services in 2017
CMS data shows 268 Medicare services from Dr. Chang across 5 procedure codes in 2017. Medicare paid $24,401 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2017268
Paid by Medicare$24,401
Procedure codes5
Dr. Chang's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 4392017: 21551%
- Tests and treatments
- 2016: 952017: 5344%
Dr. Chang compared with the Colorado median for internists, 2017
- Dr. Chang
- Colorado median
- Medicare services
- 268vs 37729% below
- Part D claims
- 67vs 31879% below
Medians across 1,630 internists in Colorado with Dmand AI profiles that report each measure.
Dr. Chang's most billed Medicare procedure codes, 2017
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. Ann Celine Chang's patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 56, with 13% women.
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 56
Patient panel by sex, all payers
- Women13%
- Men88%
Source: Dmand AI Patient Panel Data
Dr. Ann Celine Chang wrote 67 Medicare Part D claims in 2020
In 2020, Dr. Chang wrote 67 Medicare Part D claims. They cover 3 drugs, with $4,856 in total drug cost. In 2019, CMS named 479 claims across 5 drugs.
Part D claims, 202067
Drugs named by CMS3
Total drug cost$4,856
Dr. Chang's most prescribed drugs by claims, 2020
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, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 4792020: 6786%
Drugs named by CMS: 3 in 2020, 5 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Ann Celine Chang has 1 publication on record
Dmand AI links 1 paper to Dr. Chang in 2024. Dr. Chang's most frequent co-authors are Carmen Je Vonne Beamon, MD, Alexis Braverman, MD and Valerie J. Flaherman, MD.
Papers1
Dr. Chang's most frequent co-authors
- Carmen Je Vonne Beamon, MD1 shared paper
- Alexis Braverman, MD1 shared paper
- Valerie J. Flaherman, MD1 shared paper
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. Ann Celine Chang received $66 in industry payments from 2017 to 2020
CMS Open Payments shows 4 general payments to Dr. Chang from 2 drug and device companies from 2017 to 2020. Food and beverage make up the largest share, 100% of the total. Indivior Inc. paid the most, $49.
General payments to Dr. Chang by program year, 2017 to 2020
Companies that paid Dr. Chang the most, 2017 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ann Celine 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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) |
| 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. Ann Celine 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. Ann Celine Chang's NPI number?
Dr. Ann Celine Chang's NPI number is 1457390247. It was assigned on June 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ann Celine Chang?
Dr. Ann Celine Chang is an internist in Grand Junction, Colorado. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ann Celine Chang practice?
Dr. Chang practices at 2121 North Ave, Grand Junction, CO 81501. Dr. Chang's primary practice is Grand Junction VA Medical Center in Grand Junction, Colorado. Dmand AI also links Dr. Chang to 2 medical groups.
What is Dr. Ann Celine Chang's office phone number?
The practice phone on file for Dr. Chang is (913) 578-4409.
What is Dr. Ann Celine Chang's medical license number?
Dr. Chang holds Virginia license 0101058527, one of the licenses on file in 2 states.
Which states has Dr. Ann Celine Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in Virginia and Tennessee.
Which hospitals is Dr. Ann Celine Chang affiliated with?
Dr. Chang is affiliated with Greeneville Community Hospital.
What medical group is Dr. Ann Celine Chang part of?
Dr. Chang is linked to Southeastern Emergency Physicians. Dmand AI links Dr. Chang to 2 more medical groups.
Does Dr. Ann Celine Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 268 services in 2017.
What services does Dr. Ann Celine Chang bill to Medicare?
In 2017, Dr. Chang's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
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What drugs does Dr. Ann Celine Chang prescribe most?
In 2020 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Buprenorphine-Naloxone, Clonazepam and Gabapentin.
Has Dr. Ann Celine Chang received payments from drug or device companies?
CMS Open Payments shows $66 in general payments to Dr. Chang from 2 companies from 2017 to 2020. The largest total came from Indivior Inc.
How long has Dr. Ann Celine Chang been practicing?
Dr. Chang's NPI was assigned in 2006.
Does Dr. Ann Celine Chang do research?
Dmand AI links 1 publication to Dr. Chang.
Who does Dr. Ann Celine Chang publish with?
Dr. Chang's most frequent co-authors are Carmen Je Vonne Beamon, MD (1 shared paper), Alexis Braverman, MD (1 shared paper) and Valerie J. Flaherman, MD (1 shared paper).
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