Dr. Rumey Chang Ishizawar, MD, PhD
- Medicare services, 2024
- 369
- Medicare patients, 2024
- 166
- Part D claims, 2024
- 1,290
- Hospital affiliations
- 2
- Industry payments
- $63
- Practice address
- 101 Manning Drive, Chapel Hill, NC 27514
- Practice phone
- Call (919) 966-4141
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ishizawar'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. Rumey Chang Ishizawar is an internist in Chapel Hill, North Carolina
Dr. Ishizawar practices at UNC Hospitals in Chapel Hill, North Carolina, part of University of North Carolina Health Care System.
Dr. Ishizawar's NPI, 1063559664, was assigned on January 31, 2007. Dr. Ishizawar graduated from University of Virginia School of Medicine in 2005. Dr. Ishizawar holds Massachusetts license 224829.
- NPI
- 1063559664NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7517145675
- NPI enumeration date
- January 31, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (919) 966-4141
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Rumey Chang Ishizawar practices at UNC Hospitals in Chapel Hill, North Carolina
Dr. Ishizawar's primary practice is UNC Hospitals, at 101 Manning Drive, Chapel Hill, NC 27514 in Orange County. The practice phone is (919) 966-4141.
- UNC Hospitals101 Manning Drive, Chapel Hill, NC 27514 · Orange CountyPhone(919) 966-4141
Source: Dmand AI Affiliation Data
Dr. Rumey Chang Ishizawar is affiliated with 3 sites of care and 1 medical group
Dr. Ishizawar's primary practice is UNC Hospitals in Chapel Hill, North Carolina, part of University of North Carolina Health Care System. Dr. Ishizawar is also affiliated with UNC Health Rex. The medical group on file is UNC Faculty Physicians. Dmand AI also links Dr. Ishizawar to 1 more therapy and rehab clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Rumey Chang Ishizawar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ishizawar practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UNC Hospitals | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Rumey Chang Ishizawar is one of 3,705 internists in North Carolina
Internal medicine is Dr. Ishizawar's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ishizawar is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Ishizawar
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. Rumey Chang Ishizawar billed Medicare for 369 services in 2024
CMS data shows 369 Medicare services from Dr. Ishizawar across 4 procedure codes in 2024, for 166 Medicare patients. Medicare paid $13,349 for them. Every service was in an office.
Dr. Ishizawar's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2272024: 19614%
- Other services
- 2023: 02024: 173
Dr. Ishizawar compared with the North Carolina median for internists, 2024
- Dr. Ishizawar
- North Carolina median
- Medicare services
- 369vs 52129% below
- Medicare patients
- 166vs 18510% below
- Part D claims
- 1,079vs 2724.0 times
Medians across 3,695 internists in North Carolina with Dmand AI profiles that report each measure.
Dr. Ishizawar'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. Rumey Chang Ishizawar treated 166 Medicare patients in 2024, average age 70
CMS counts 166 Medicare patients who saw Dr. Ishizawar in 2024. The largest group is 65 to 74, with 69 patients. 75% of them have arthritis, and 75% have high blood pressure. 13% are also on Medicaid. Their average risk score is 1.86, 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. Ishizawar's median patient age at 68, with 70% women.
Dr. Ishizawar's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ishizawar's Medicare patients by sex, 2024
- Women11066%
- Men5634%
Chronic conditions among Dr. Ishizawar's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol67%
- Diabetes33%
- Mood disorders32%
- Depression31%
- Osteoporosis31%
- Ischemic heart disease29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ishizawar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women70%
- Men29%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Rumey Chang Ishizawar wrote 1,290 Medicare Part D claims in 2024
In 2024, Dr. Ishizawar wrote 1,290 Medicare Part D claims for 190 patients. 80% of them were for generic drugs. CMS names the drug for 1,079 of them, across 25 drugs with 11 or more claims each, at $1,035,626 in total drug cost. In 2023, CMS named 1,267 claims across 33 drugs.
Dr. Ishizawar's Part D claims by kind of drug, 2024
- Generic1,029 claims80%
- Brand-name261 claims20%
Dr. Ishizawar'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. Ishizawar's Part D claims, 2024
- Opioids3%34 of 1,290 claims
- Antibiotics1%14 of 1,290 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: 1,2672024: 1,07915%
Drugs named by CMS: 25 in 2024, 33 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. Rumey Chang Ishizawar offers telehealth to Medicare patients
Dr. Ishizawar accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ishizawar as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Rumey Chang Ishizawar received $63 in industry payments in 2023
CMS Open Payments shows 1 general payment to Dr. Ishizawar from 1 drug or device company in 2023. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $63.
Companies that paid Dr. Ishizawar the most, 2023 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Rumey Chang Ishizawar graduated from University of Virginia School of Medicine
Dr. Ishizawar graduated from University of Virginia School of Medicine in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Rumey Chang Ishizawar'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 |
| 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. Rumey Chang Ishizawar
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. Rumey Chang Ishizawar's NPI number?
Dr. Rumey Chang Ishizawar's NPI number is 1063559664. It was assigned on January 31, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Rumey Chang Ishizawar?
Dr. Rumey Chang Ishizawar is an internist in Chapel Hill, North Carolina. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Rumey Chang Ishizawar practice?
Dr. Ishizawar practices at 101 Manning Drive, Chapel Hill, NC 27514. Dr. Ishizawar's primary practice is UNC Hospitals in Chapel Hill, North Carolina, part of University of North Carolina Health Care System. Dmand AI also links Dr. Ishizawar to 1 therapy and rehab clinic.
What is Dr. Rumey Chang Ishizawar's office phone number?
The practice phone on file for Dr. Ishizawar is (919) 966-4141.
What is Dr. Rumey Chang Ishizawar's medical license number?
Dr. Ishizawar holds Massachusetts license 224829.
Which hospitals is Dr. Rumey Chang Ishizawar affiliated with?
Dr. Ishizawar practices at UNC Hospitals in Chapel Hill, North Carolina. Dr. Ishizawar is also affiliated with UNC Health Rex.
What medical group is Dr. Rumey Chang Ishizawar part of?
Dr. Ishizawar is linked to UNC Faculty Physicians.
Does Dr. Rumey Chang Ishizawar accept Medicare?
Yes. CMS data shows Dr. Ishizawar billed Medicare for 369 services in 2024, and Dr. Ishizawar accepts Medicare assignment.
Does Dr. Rumey Chang Ishizawar offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ishizawar as offering telehealth services.
How many Medicare patients does Dr. Rumey Chang Ishizawar see?
CMS counts 166 Medicare patients who saw Dr. Ishizawar in 2024, with an average age of 70.
Show 5 more questionsShow fewer questions
What services does Dr. Rumey Chang Ishizawar bill to Medicare?
In 2024, Dr. Ishizawar's most billed Medicare services were medicare service (G2211), office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. Rumey Chang Ishizawar go to medical school?
Dr. Ishizawar graduated from University of Virginia School of Medicine in 2005.
What drugs does Dr. Rumey Chang Ishizawar prescribe most?
In 2024 Medicare Part D data, Dr. Ishizawar's most prescribed drugs by claims were Hydroxychloroquine Sulfate, Prednisone and Methotrexate.
Has Dr. Rumey Chang Ishizawar received payments from drug or device companies?
CMS Open Payments shows $63 in general payments to Dr. Ishizawar from 1 company from 2023 to 2023. The largest total came from Abbvie Inc.
How long has Dr. Rumey Chang Ishizawar been practicing?
Dr. Ishizawar graduated from medical school in 2005, 21 years ago.
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