Dr. Joy H. Chang, MD
- Medicare services, 2024
- 604
- Medicare patients, 2024
- 78
- Part D claims, 2024
- 1,937
- Hospital affiliations
- 1
- Industry payments
- $465
- Practice address
- 22 South Greene Street, Baltimore, MD 21201
- Practice phone
- Call (410) 328-8667
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chang'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. Joy H. Chang is an addiction psychiatry physician in Baltimore, Maryland
Dr. Chang practices at University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System.
Dr. Chang's NPI, 1154620540, was assigned on March 24, 2011. Dr. Chang graduated from Wright State University Boonshoft School of Medicine in 2011. Dr. Chang holds Maryland license D0076718.
- NPI
- 1154620540NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7911210851
- NPI enumeration date
- March 24, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (410) 328-8667
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Joy H. Chang practices at University of Maryland Medical Center in Baltimore, Maryland
Dr. Chang's primary practice is University of Maryland Medical Center, at 22 South Greene Street, Baltimore, MD 21201 in Baltimore City. The practice phone is (410) 328-8667.
- University of Maryland Medical Center22 South Greene Street, Baltimore, MD 21201 · Baltimore CityPhone(410) 328-8667
Source: Dmand AI Affiliation Data
Dr. Joy H. Chang is affiliated with 1 site of care and 1 medical group
Dr. Chang's primary practice is University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System. The medical group on file is Cornerstone Montgomery.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Joy H. Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University of Maryland Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Joy H. Chang is one of 14 addiction psychiatry physicians in Maryland
Addiction psychiatry is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 2084P0802X. Dr. Chang is licensed in Maryland.
Specialties and state licenses
- Addiction psychiatry, MarylandPrimary
Addiction psychiatry physicians near Dr. Chang
Counts of addiction psychiatry physicians 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. Joy H. Chang billed Medicare for 604 services in 2024
CMS data shows 604 Medicare services from Dr. Chang across 6 procedure codes in 2024, for 78 Medicare patients. Medicare paid $49,928 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 02024: 499
- Office and hospital visits
- 2023: 172024: 105518%
Dr. Chang compared with the Maryland median for addiction psychiatry physicians, 2024
- Dr. Chang
- Maryland median
- Part D claims
- 1,648vs 7821.1 times
Medians across 18 addiction psychiatry physicians in Maryland 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 addiction psychiatry physicians in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Joy H. Chang treated 78 Medicare patients in 2024, average age 58
CMS counts 78 Medicare patients who saw Dr. Chang in 2024. The largest group is under 65, with 42 patients. 72% of them have mood disorders, and 68% have high cholesterol. 81% are also on Medicaid. Their average risk score is 1.68, 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 49, with 60% women.
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
- Women4355%
- Men3545%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- Mood disorders72%
- High cholesterol68%
- High blood pressure64%
- Schizophrenia and other psychoses63%
- Bipolar disorder44%
- Depression44%
- Anxiety42%
- Arthritis38%
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 49
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Joy H. Chang wrote 1,937 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 1,937 Medicare Part D claims for 239 patients. 91% of them were for generic drugs. CMS names the drug for 1,648 of them, across 46 drugs with 11 or more claims each, at $274,466 in total drug cost. In 2023, CMS named 28 claims across 2 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic1,768 claims91%
- Brand-name169 claims9%
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
- Antipsychotics, patients 65 and over13%250 of 1,937 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: 282024: 1,6485786%
Drugs named by CMS: 46 in 2024, 2 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. Joy H. 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. Joy H. Chang received $465 in industry payments from 2016 to 2025
CMS Open Payments shows 9 general payments to Dr. Chang from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 60% of the total. Janssen Pharmaceuticals, Inc paid the most, $227.
General payments to Dr. Chang by program year, 2016 to 2025
General payments to Dr. Chang by kind, 2016 to 2025
- Food and beverage$27860%
- Education$18740%
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. Joy H. Chang graduated from Wright State University Boonshoft School of Medicine
Dr. Chang graduated from Wright State University Boonshoft School of Medicine in 2011.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Joy H. 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 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. Joy H. 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. Joy H. Chang's NPI number?
Dr. Joy H. Chang's NPI number is 1154620540. It was assigned on March 24, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Joy H. Chang?
Dr. Joy H. Chang is an addiction psychiatry physician in Baltimore, Maryland. The primary specialty in the NPI Registry is Addiction Psychiatry Physician (taxonomy code 2084P0802X).
Where does Dr. Joy H. Chang practice?
Dr. Chang practices at 22 South Greene Street, Baltimore, MD 21201. Dr. Chang's primary practice is University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System.
What is Dr. Joy H. Chang's office phone number?
The practice phone on file for Dr. Chang is (410) 328-8667.
What is Dr. Joy H. Chang's medical license number?
Dr. Chang holds Maryland license D0076718.
Which hospitals is Dr. Joy H. Chang affiliated with?
Dr. Chang practices at University of Maryland Medical Center in Baltimore, Maryland.
What medical group is Dr. Joy H. Chang part of?
Dr. Chang is linked to Cornerstone Montgomery.
Does Dr. Joy H. Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 604 services in 2024, and Dr. Chang accepts Medicare assignment.
Does Dr. Joy H. Chang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chang as offering telehealth services.
How many Medicare patients does Dr. Joy H. Chang see?
CMS counts 78 Medicare patients who saw Dr. Chang in 2024, with an average age of 58.
Show 5 more questionsShow fewer questions
What services does Dr. Joy H. Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were psychiatric service (90832), psychiatric service (90834) and psychiatric service (90837).
Where did Dr. Joy H. Chang go to medical school?
Dr. Chang graduated from Wright State University Boonshoft School of Medicine in 2011.
What drugs does Dr. Joy H. Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Clozapine, Olanzapine and Benztropine Mesylate.
Has Dr. Joy H. Chang received payments from drug or device companies?
CMS Open Payments shows $465 in general payments to Dr. Chang from 7 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Joy H. Chang been practicing?
Dr. Chang graduated from medical school in 2011, 15 years ago.
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