Dr. Claire Y. Zhang, MD
- Medicare services, 2024
- 703
- Medicare patients, 2024
- 462
- Part D claims, 2024
- 795
- Publications
- 1
- Hospital affiliations
- 3
- Practice address
- 106 Bow Street, Elkton, MD 21921
- Practice phone
- Call (410) 392-7009
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zhang's professional email, personal email and mobile number
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Dr. Claire Y. Zhang is a gastroenterologist in Elkton, Maryland
Dr. Zhang practices at ChristianaCare Union Hospital in Elkton, Maryland, part of ChristianaCare.
Dr. Zhang's NPI, 1194145672, was assigned on April 23, 2014. Dr. Zhang graduated from University of Rochester School of Medicine and Dentistry in 2014. Dr. Zhang holds Maryland license D91557.
- NPI
- 1194145672NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941500334
- NPI enumeration date
- April 23, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (410) 392-7009
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Claire Y. Zhang practices at ChristianaCare Union Hospital in Elkton, Maryland
Dr. Zhang's primary practice is ChristianaCare Union Hospital, at 106 Bow Street, Elkton, MD 21921 in Cecil County. The practice phone is (410) 392-7009.
- ChristianaCare Union Hospital106 Bow Street, Elkton, MD 21921 · Cecil CountyPhone(410) 392-7009
Source: Dmand AI Affiliation Data
Dr. Claire Y. Zhang is affiliated with 5 sites of care and 2 medical groups
Dr. Zhang's primary practice is ChristianaCare Union Hospital in Elkton, Maryland, part of ChristianaCare. Dr. Zhang is also affiliated with Christiana Hospital. The medical group on file is ChristianaCare. Dmand AI also links Dr. Zhang to 1 more hospital, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Claire Y. Zhang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zhang practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ChristianaCare Union Hospital | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across ChristianaCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Claire Y. Zhang is one of 405 gastroenterologists in Maryland
Gastroenterology is Dr. Zhang's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Zhang's licenses on file in 2 states: Maryland and Delaware.
Specialties and state licenses
- Gastroenterology, MarylandPrimary
- Delaware license
Gastroenterologists near Dr. Zhang
Counts of gastroenterologists 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. Claire Y. Zhang billed Medicare for 703 services in 2024
CMS data shows 703 Medicare services from Dr. Zhang across 13 procedure codes in 2024, for 462 Medicare patients. Medicare paid $71,180 for them.
Dr. Zhang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4332024: 4381%
- Surgery
- 2023: 2762024: 24013%
- Other services
- 2023: 262024: 254%
Where Dr. Zhang's Medicare services took place, 2024
- In an office32446%
- In a facility37954%
Dr. Zhang compared with the Maryland median for gastroenterologists, 2024
- Dr. Zhang
- Maryland median
- Medicare services
- 703vs 6685% above
- Medicare patients
- 462vs 39018% above
- Part D claims
- 642vs 39264% above
Medians across 396 gastroenterologists in Maryland with Dmand AI profiles that report each measure.
Dr. Zhang'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zhang and other gastroenterologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Claire Y. Zhang treated 462 Medicare patients in 2024, average age 72
CMS counts 462 Medicare patients who saw Dr. Zhang in 2024. The largest group is 65 to 74, with 245 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 1.46, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Zhang's median patient age at 57, with 63% women.
Dr. Zhang's Medicare patients by age, 2024
Dr. Zhang's Medicare patients by sex, 2024
- Women30165%
- Men16135%
Chronic conditions among Dr. Zhang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Diabetes35%
- Mood disorders35%
- Anxiety34%
- Depression32%
- COPD27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zhang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women63%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Claire Y. Zhang wrote 795 Medicare Part D claims in 2024
In 2024, Dr. Zhang wrote 795 Medicare Part D claims for 305 patients. 84% of them were for generic drugs. CMS names the drug for 642 of them, across 16 drugs with 11 or more claims each, at $65,582 in total drug cost. In 2023, CMS named 637 claims across 13 drugs.
Dr. Zhang's Part D claims by kind of drug, 2024
- Generic665 claims84%
- Brand-name130 claims16%
Dr. Zhang'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. Zhang's Part D claims, 2024
- Antibiotics2%13 of 795 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: 6372024: 6421%
Drugs named by CMS: 16 in 2024, 13 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. Claire Y. Zhang ranks in the 86th percentile for colonoscopy in Medicare
Dr. Zhang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 132 procedures of colonoscopy by Dr. Zhang, more than 86% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Zhang ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 85th percentile150 procedures
- Colonoscopy
- 86th percentile132 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Claire Y. Zhang has 1 publication on record
Dmand AI links 1 paper to Dr. Zhang in 2021. Dr. Zhang's most frequent co-author is Annette M. Kyprianou, MD.
Dr. Zhang's most frequent co-authors
Recent publications by Dr. Zhang
See who Dr. Zhang researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Zhang works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Claire Y. Zhang received $1,917 in industry payments from 2017 to 2025
CMS Open Payments shows 72 general payments to Dr. Zhang from 17 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 99% of the total. Abbvie Inc. paid the most, $610.
General payments to Dr. Zhang by program year, 2017 to 2025
General payments to Dr. Zhang by kind, 2017 to 2025
- Food and beverage$1,90099%
- Education$171%
Companies that paid Dr. Zhang the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Claire Y. Zhang graduated from University of Rochester School of Medicine and Dentistry
Dr. Zhang graduated from University of Rochester School of Medicine and Dentistry in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Claire Y. Zhang'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)Doctors and Clinicians Utilization Data (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. Claire Y. Zhang
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. Claire Y. Zhang's NPI number?
Dr. Claire Y. Zhang's NPI number is 1194145672. It was assigned on April 23, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Claire Y. Zhang?
Dr. Claire Y. Zhang is a gastroenterologist in Elkton, Maryland. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Claire Y. Zhang practice?
Dr. Zhang practices at 106 Bow Street, Elkton, MD 21921. Dr. Zhang's primary practice is ChristianaCare Union Hospital in Elkton, Maryland, part of ChristianaCare. Dmand AI also links Dr. Zhang to 1 hospital, 2 group practices and clinics and 1 medical group.
What is Dr. Claire Y. Zhang's office phone number?
The practice phone on file for Dr. Zhang is (410) 392-7009.
What is Dr. Claire Y. Zhang's medical license number?
Dr. Zhang holds Maryland license D91557, one of the licenses on file in 2 states.
Which states has Dr. Claire Y. Zhang been licensed in?
Dmand AI has state licenses on file for Dr. Zhang in Maryland and Delaware.
Which hospitals is Dr. Claire Y. Zhang affiliated with?
Dr. Zhang practices at ChristianaCare Union Hospital in Elkton, Maryland. Dr. Zhang is also affiliated with Christiana Hospital. Dmand AI links Dr. Zhang to 1 more hospital.
What medical group is Dr. Claire Y. Zhang part of?
Dr. Zhang is linked to ChristianaCare. Dmand AI links Dr. Zhang to 1 more medical group.
Does Dr. Claire Y. Zhang accept Medicare?
Yes. CMS data shows Dr. Zhang billed Medicare for 703 services in 2024, and Dr. Zhang accepts Medicare assignment.
How many Medicare patients does Dr. Claire Y. Zhang see?
CMS counts 462 Medicare patients who saw Dr. Zhang in 2024, with an average age of 72.
Show 7 more questionsShow fewer questions
What services does Dr. Claire Y. Zhang bill to Medicare?
In 2024, Dr. Zhang's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and surgery: digestive system (43239).
Where did Dr. Claire Y. Zhang go to medical school?
Dr. Zhang graduated from University of Rochester School of Medicine and Dentistry in 2014.
What drugs does Dr. Claire Y. Zhang prescribe most?
In 2024 Medicare Part D data, Dr. Zhang's most prescribed drugs by claims were Omeprazole, Gavilyte-C and Linzess.
Has Dr. Claire Y. Zhang received payments from drug or device companies?
CMS Open Payments shows $1,917 in general payments to Dr. Zhang from 17 companies from 2017 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Claire Y. Zhang been practicing?
Dr. Zhang graduated from medical school in 2014, 12 years ago.
Does Dr. Claire Y. Zhang do research?
Dmand AI links 1 publication to Dr. Zhang.
Who does Dr. Claire Y. Zhang publish with?
Dr. Zhang's most frequent co-authors are Annette M. Kyprianou, MD (1 shared paper).
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