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Dr. Harry Chang, MD
NPI1598150831PAC ID4486901485
- Medicare services, 2024
- 429
- Medicare patients, 2024
- 150
- Part D claims, 2024
- 12
- Publications
- 3
- MIPS score, 2024
- 100
- Practice address
- 622 W 168th St, New York, NY 10032
- Practice phone
- Call (212) 297-4255
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Columbia University Irving Medical Center
New York, New York
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Dr. Harry Chang is a hospitalist in New York, New York
Dr. Chang practices at Columbia University Irving Medical Center in New York, New York.
Dr. Chang's NPI, 1598150831, was assigned on April 3, 2015. Dr. Chang graduated from Yale University School of Medicine in 2014. Dr. Chang holds New York license 287180.
NPI and contact details
- NPI
- 1598150831NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4486901485
- NPI enumeration date
- April 3, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (212) 297-4255
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Harry Chang practices at Columbia University Irving Medical Center in New York, New York
Dr. Chang's primary practice is Columbia University Irving Medical Center, at 622 W 168th St, New York, NY 10032 in New York County. The practice phone is (212) 297-4255.
- Columbia University Irving Medical Center622 W 168th St, New York, NY 10032 · New York CountyPhone(212) 297-4255
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Harry Chang is affiliated with 4 sites of care and 2 medical groups
Dr. Chang's primary practice is Columbia University Irving Medical Center in New York, New York. Dr. Chang is also affiliated with NewYork-Presbyterian/Weill Cornell Medical Center. The medical group on file is ColumbiaDoctors. Dmand AI also links Dr. Chang to 2 more group practices and clinics and 1 medical group, each named with a free account.
Columbia University Irving Medical CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Harry Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Columbia University Irving Medical Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Harry Chang is one of 1,796 hospitalists in New York
Hospitalist is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Chang is licensed in New York.
Specialties and state licenses
- Hospitalist, New YorkPrimary
Hospitalists near Dr. Chang
Counts of hospitalists 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. Harry Chang billed Medicare for 429 services in 2024
CMS data shows 429 Medicare services from Dr. Chang across 5 procedure codes in 2024, for 150 Medicare patients. Medicare paid $40,434 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024429
Medicare patients150
Paid by Medicare$40,434
Procedure codes5
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4282024: 429No change
Dr. Chang compared with the New York median for hospitalists, 2024
- Dr. Chang
- New York median
- Medicare services
- 429vs 38811% above
- Medicare patients
- 150vs 1638% below
- Part D claims
- 39vs 5529% below
Medians across 1,696 hospitalists in New York 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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Harry Chang treated 150 Medicare patients in 2024, average age 75
CMS counts 150 Medicare patients who saw Dr. Chang in 2024. The largest group is 75 to 84, with 51 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 65% are also on Medicaid. Their average risk score is 3.56, 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 77, with 59% women.
Medicare patients, 2024150
Average age75
Average risk score3.56
Also on Medicaid65%
Dr. Chang's Medicare patients by age, 2024
Dr. Chang's Medicare patients by sex, 2024
- Women8859%
- Men6241%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes71%
- Chronic kidney disease66%
- Arthritis53%
- Ischemic heart disease51%
- Mood disorders51%
- Heart failure50%
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 77
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Harry Chang wrote 12 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 3 drugs, with $2,435 in total drug cost. In 2020, CMS named 17 claims across 1 drug.
Part D claims, 202412
Drugs named by CMS3
Total drug cost$2,435
Dr. Chang's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 172021: 39129%
Drugs named by CMS: 3 in 2021, 1 in 2020.
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. Harry Chang scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Chang for performance year 2024, reported through an alternative payment model (APM). Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Chang's MIPS scores, performance year 2024
- 100of 100Final score
- 85.3of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Harry Chang has 3 publications on record
Dmand AI links 3 papers to Dr. Chang, published from 2013 to 2025. Dr. Chang has published most often in PLoS One. Dr. Chang's most frequent co-authors are Neel M. Butala, MBA, MD, Lucas Chen, MD and Mitchell S. Elkind, MD.
Papers3
Years published2013 to 2025
Dr. Chang's papers by year, 2013 to 2025
Dr. Chang's most frequent co-authors
- Neel M. Butala, MBA, MD1 shared paper
- Lucas Chen, MD1 shared paper
- Mitchell S. Elkind, MD1 shared paper
Recent publications by Dr. Chang
Fee-for-Service PlansHIV InfectionsHIV Seropositivity
Ambulatory Care FacilitiesMass ScreeningPhysical Examination
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 hospitalists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Harry Chang received $332 in industry payments from 2018 to 2023
CMS Open Payments shows 17 general payments to Dr. Chang from 6 drug and device companies from 2018 to 2023. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $80.
General payments to Dr. Chang by program year, 2018 to 2023
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. Harry Chang graduated from Yale University School of Medicine
Dr. Chang graduated from Yale University School of Medicine in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Harry 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)Clinician Public Reporting: Overall MIPS Performance (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. Harry 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. Harry Chang's NPI number?
Dr. Harry Chang's NPI number is 1598150831. It was assigned on April 3, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Harry Chang?
Dr. Harry Chang is a hospitalist in New York, New York. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Harry Chang practice?
Dr. Chang practices at 622 W 168th St, New York, NY 10032. Dr. Chang's primary practice is Columbia University Irving Medical Center in New York, New York. Dmand AI also links Dr. Chang to 2 group practices and clinics and 1 medical group.
What is Dr. Harry Chang's office phone number?
The practice phone on file for Dr. Chang is (212) 297-4255.
What is Dr. Harry Chang's medical license number?
Dr. Chang holds New York license 287180.
Which hospitals is Dr. Harry Chang affiliated with?
Dr. Chang is affiliated with NewYork-Presbyterian/Weill Cornell Medical Center.
What medical group is Dr. Harry Chang part of?
Dr. Chang is linked to ColumbiaDoctors. Dmand AI links Dr. Chang to 1 more medical group.
Does Dr. Harry Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 429 services in 2024, and Dr. Chang accepts Medicare assignment.
What is Dr. Harry Chang's MIPS score?
Dr. Chang's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Harry Chang see?
CMS counts 150 Medicare patients who saw Dr. Chang in 2024, with an average age of 75.
Show 7 more questionsShow fewer questions
What services does Dr. Harry Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99238).
Where did Dr. Harry Chang go to medical school?
Dr. Chang graduated from Yale University School of Medicine in 2014.
What drugs does Dr. Harry Chang prescribe most?
In 2021 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Lisinopril, Aripiprazole and Quetiapine Fumarate.
Has Dr. Harry Chang received payments from drug or device companies?
CMS Open Payments shows $332 in general payments to Dr. Chang from 6 companies from 2018 to 2023. The largest total came from Pfizer Inc.
How long has Dr. Harry Chang been practicing?
Dr. Chang graduated from medical school in 2014, 12 years ago.
Does Dr. Harry Chang do research?
Dmand AI links 3 publications to Dr. Chang, published from 2013 to 2025.
Who does Dr. Harry Chang publish with?
Dr. Chang's most frequent co-authors are Neel M. Butala, MBA, MD (1 shared paper), Lucas Chen, MD (1 shared paper) and Mitchell S. Elkind, MD (1 shared paper).
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