Dr. Mark Michael Chung, MD
- Medicare services, 2024
- 408
- Medicare patients, 2024
- 160
- Part D claims, 2024
- 992
- Hospital affiliations
- 1
- Industry payments
- $4,565
- Practice address
- 1301 N Rose Drive, Placentia, CA 92870
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chung's professional email, personal email and mobile number
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Dr. Mark Michael Chung is an internist in Placentia, California
Dr. Chung practices at UCI Health - Placentia Linda in Placentia, California, part of UC Irvine.
Dr. Chung's NPI, 1740290378, was assigned on August 8, 2006. Dr. Chung graduated from Jacobs School of Medicine and Biomedical Sciences in 1982. Dr. Chung's California license number on file is G52290.
- NPI
- 1740290378NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7911817929
- NPI enumeration date
- August 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Michael Chung practices at UCI Health - Placentia Linda in Placentia, California
Dr. Chung's primary practice is UCI Health - Placentia Linda, at 1301 N Rose Drive, Placentia, CA 92870.
- UCI Health - Placentia Linda1301 N Rose Drive, Placentia, CA 92870
Source: Dmand AI Affiliation Data
Dr. Mark Michael Chung is affiliated with 2 sites of care and 1 medical group
Dr. Chung's primary practice is UCI Health - Placentia Linda in Placentia, California, part of UC Irvine. The medical group on file is Amwell Medical Group (also known as Online Care Group). Dmand AI also links Dr. Chung to 1 more hospital outpatient department, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Michael Chung's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chung practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCI Health - Placentia Linda | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Michael Chung is one of 16,751 internists in California
Internal medicine is Dr. Chung's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chung is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Chung's licenses on file in 5 states: California, Florida, New Jersey, New York and Connecticut.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Florida license
- New Jersey license
- New York license
- Connecticut license
Clinical focus
Dmand AI lists asthma, bronchitis, chronic obstructive pulmonary disease (COPD), hypersomnia, sleep apnea and tobacco use among the conditions Dr. Chung treats.
Internists near Dr. Chung
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. Mark Michael Chung billed Medicare for 408 services in 2024
CMS data shows 408 Medicare services from Dr. Chung across 3 procedure codes in 2024, all of them office visits, for 160 Medicare patients. Medicare paid $53,686 for them. Every service was in an office.
Dr. Chung's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5512024: 40826%
Dr. Chung compared with the California median for internists, 2024
- Dr. Chung
- California median
- Medicare services
- 408vs 36113% above
- Medicare patients
- 160vs 1516% above
- Part D claims
- 775vs 42184% above
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Chung'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. Chung and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Michael Chung treated 160 Medicare patients in 2024, average age 74
CMS counts 160 Medicare patients who saw Dr. Chung in 2024. The largest group is 65 to 74, with 78 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 7% are also on Medicaid. Their average risk score is 1.51, 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. Chung's median patient age at 61, with 47% women.
Dr. Chung's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chung's Medicare patients by sex, 2024
- Women6038%
- Men10063%
Chronic conditions among Dr. Chung's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Diabetes31%
- Atrial fibrillation26%
- Ischemic heart disease24%
- COPD23%
- Chronic kidney disease21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chung's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women47%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Michael Chung wrote 992 Medicare Part D claims in 2024
In 2024, Dr. Chung wrote 992 Medicare Part D claims for 308 patients. 76% of them were for generic drugs. CMS names the drug for 775 of them, across 25 drugs with 11 or more claims each, at $104,326 in total drug cost. In 2023, CMS named 1,114 claims across 29 drugs.
Dr. Chung's Part D claims by kind of drug, 2024
- Generic756 claims76%
- Brand-name and other236 claims24%
Dr. Chung'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. Chung's Part D claims, 2024
- Antibiotics13%127 of 992 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: 1,1142024: 77530%
Drugs named by CMS: 25 in 2024, 29 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
How Dr. Mark Michael Chung takes part in Medicare
Dr. Chung accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mark Michael Chung received $4,565 in industry payments from 2016 to 2025
CMS Open Payments shows 158 general payments to Dr. Chung from 9 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. GlaxoSmithKline, LLC. paid the most, $2,727.
General payments to Dr. Chung by program year, 2016 to 2025
General payments to Dr. Chung by kind, 2016 to 2025
- Food and beverage$4,51099%
- Education$551%
Companies that paid Dr. Chung 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. Mark Michael Chung has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chung, most recently Fellow in 2019.
Awards and honors for Dr. Chung
- 2019
- Fellow
Source: Dmand AI Professional Profile Data
Dr. Mark Michael Chung graduated from Jacobs School of Medicine and Biomedical Sciences
Dr. Chung graduated from Jacobs School of Medicine and Biomedical Sciences in 1982.
- Medical school
- Board certified in internal medicine
- Board certified in sleep medicine
Source: Dmand AI Professional Profile Data
Dr. Mark Michael Chung accepts plans from 9 insurance carriers
Dr. Chung is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- Regence Health Plans
- CMS Medicare
- +1 more carriersWith a free account
Plan types Dr. Chung accepts, by number of carriers
- Medicare8
- PPO6
- HMO5
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Mark Michael Chung'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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Mark Michael Chung
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. Mark Michael Chung's NPI number?
Dr. Mark Michael Chung's NPI number is 1740290378. It was assigned on August 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Michael Chung?
Dr. Mark Michael Chung is an internist in Placentia, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mark Michael Chung practice?
Dr. Chung practices at 1301 N Rose Drive, Placentia, CA 92870. Dr. Chung's primary practice is UCI Health - Placentia Linda in Placentia, California, part of UC Irvine. Dmand AI also links Dr. Chung to 1 hospital outpatient department.
What is Dr. Mark Michael Chung's medical license number?
Dr. Chung's California license number on file is G52290, one of the licenses on file in 5 states.
Which states has Dr. Mark Michael Chung been licensed in?
Dmand AI has state licenses on file for Dr. Chung in California (1984 to 2025), Florida (2022 to 2027), New Jersey (2020 to 2027), New York (1983 to 2026) and Connecticut (2020 to 2025).
Which hospitals is Dr. Mark Michael Chung affiliated with?
Dr. Chung practices at UCI Health - Placentia Linda in Placentia, California.
What medical group is Dr. Mark Michael Chung part of?
Dr. Chung is linked to Amwell Medical Group (also known as Online Care Group).
Does Dr. Mark Michael Chung accept Medicare?
Yes. CMS data shows Dr. Chung billed Medicare for 408 services in 2024, and Dr. Chung accepts Medicare assignment.
How many Medicare patients does Dr. Mark Michael Chung see?
CMS counts 160 Medicare patients who saw Dr. Chung in 2024, with an average age of 74.
Is Dr. Mark Michael Chung board certified?
Yes. Dr. Chung is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Mark Michael Chung bill to Medicare?
In 2024, Dr. Chung's most billed Medicare services were office visit, established patient (99215), office visit, established patient (99214) and office visit, new patient (99205).
Where did Dr. Mark Michael Chung go to medical school?
Dr. Chung graduated from Jacobs School of Medicine and Biomedical Sciences in 1982.
What drugs does Dr. Mark Michael Chung prescribe most?
In 2024 Medicare Part D data, Dr. Chung's most prescribed drugs by claims were Ipratropium Bromide, Montelukast Sodium and Trelegy Ellipta.
Has Dr. Mark Michael Chung received payments from drug or device companies?
CMS Open Payments shows $4,565 in general payments to Dr. Chung from 9 companies from 2016 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Mark Michael Chung been practicing?
Dr. Chung graduated from medical school in 1982, 44 years ago.
What insurance does Dr. Mark Michael Chung accept?
Dr. Chung is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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