Dr. Robert Wing Chan, MD
- Medicare services, 2024
- 8,490
- Medicare patients, 2024
- 470
- Part D claims, 2024
- 26,021
- Industry payments
- $38,774
- Affiliated sites
- 5
- Practice address
- 409 W Main St, Alhambra, CA 91801
- Practice phone
- Call (626) 382-1263
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ros Medical Group Inc
Alhambra, California
Find Dr. Chan'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. Robert Wing Chan is an internist in Alhambra, California
Dr. Chan practices at Ros Medical Group Inc in Alhambra, California.
Dr. Chan's NPI, 1508826488, was assigned on March 24, 2006. Dr. Chan graduated from UC Irvine School of Medicine in 1997. Dr. Chan holds California license A67678.
- NPI
- 1508826488NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668598061
- NPI enumeration date
- March 24, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (626) 382-1263
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Wing Chan practices at Ros Medical Group Inc in Alhambra, California
Dr. Chan's primary practice is Ros Medical Group Inc, at 409 W Main St, Alhambra, CA 91801 in Los Angeles County. The practice phone is (626) 382-1263.
- Ros Medical Group Inc409 W Main St, Alhambra, CA 91801 · Los Angeles CountyPhone(626) 382-1263
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Robert Wing Chan is affiliated with 6 sites of care and 1 medical group
Dr. Chan's primary practice is Ros Medical Group Inc in Alhambra, California. The medical group on file is Ros Medical Group. Dmand AI also links Dr. Chan to 1 more physician office, 1 group practice or clinic, 1 home health agency, 1 hospice and 1 skilled nursing facility, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Robert Wing Chan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chan practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ros Medical Group Inc | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Wing Chan is one of 16,751 internists in California
Internal medicine is Dr. Chan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chan is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute skin infection, aneurysm, aortic atherosclerois, arthritis, asthma, atrial fibrillation and flutter and bronchitis among the conditions Dr. Chan treats.
Internists near Dr. Chan
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. Robert Wing Chan billed Medicare for 8,490 services in 2024
CMS data shows 8,490 Medicare services from Dr. Chan across 24 procedure codes in 2024, for 470 Medicare patients. Medicare paid $454,357 for them.
Dr. Chan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8,7782024: 6,25029%
- Other services
- 2023: 2,3322024: 1,90618%
- Surgery
- 2023: 2632024: 14844%
- Lab and pathology
- 2023: 2082024: 9654%
- Tests and treatments
- 2023: 1622024: 6162%
- Drugs given in the office
- 2023: 882024: 2967%
Where Dr. Chan's Medicare services took place, 2024
- In an office8,472100%
- In a facility180%
Dr. Chan compared with the California median for internists, 2024
- Dr. Chan
- California median
- Medicare services
- 8,490vs 36123.5 times
- Medicare patients
- 470vs 1513.1 times
- Part D claims
- 25,357vs 42160.2 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Chan'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. Chan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chan and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Wing Chan treated 470 Medicare patients in 2024, average age 75
CMS counts 470 Medicare patients who saw Dr. Chan in 2024. The largest group is 65 to 74, with 217 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 92% are also on Medicaid. Their average risk score is 1.29, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chan's median patient age at 64, with 52% women.
Dr. Chan's Medicare patients by age, 2024
Dr. Chan's Medicare patients by sex, 2024
- Women27358%
- Men19742%
Chronic conditions among Dr. Chan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease58%
- Diabetes54%
- Arthritis43%
- Osteoporosis39%
- Ischemic heart disease33%
- COPD24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women52%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert Wing Chan wrote 26,021 Medicare Part D claims in 2024
In 2024, Dr. Chan wrote 26,021 Medicare Part D claims for 868 patients. 82% of them were for generic drugs. CMS names the drug for 25,357 of them, across 187 drugs with 11 or more claims each, at $3,018,097 in total drug cost. In 2023, CMS named 25,036 claims across 210 drugs.
Dr. Chan's Part D claims by kind of drug, 2024
- Generic21,230 claims82%
- Brand-name4,485 claims17%
- Other306 claims1%
Dr. Chan'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. Chan's Part D claims, 2024
- Opioids0%30 of 26,021 claims
- Antibiotics1%373 of 26,021 claims
- Antipsychotics, patients 65 and over0%38 of 26,021 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: 25,0362024: 25,3571%
Drugs named by CMS: 187 in 2024, 210 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. Robert Wing Chan offers telehealth to Medicare patients
Dr. Chan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Robert Wing Chan received $38,774 in industry payments from 2016 to 2025
CMS Open Payments shows 1,327 general payments to Dr. Chan from 48 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. AstraZeneca Pharmaceuticals LP paid the most, $5,097.
General payments to Dr. Chan by program year, 2016 to 2025
General payments to Dr. Chan by kind, 2016 to 2025
- Food and beverage$37,71197%
- Travel and lodging$6822%
- Education$3221%
- Speaker and faculty fees$590%
Companies that paid Dr. Chan 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. Robert Wing Chan graduated from UC Irvine School of Medicine
Dr. Chan graduated from UC Irvine School of Medicine in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Robert Wing Chan accepts plans from 10 insurance carriers
Dr. Chan is in network with 10 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- LA Care
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- Regence Health Plans
- +2 more carriersWith a free account
Plan types Dr. Chan accepts, by number of carriers
- Medicare9
- HMO6
- PPO6
- POS3
- EPO2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Robert Wing Chan'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Robert Wing Chan
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. Robert Wing Chan's NPI number?
Dr. Robert Wing Chan's NPI number is 1508826488. It was assigned on March 24, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Wing Chan?
Dr. Robert Wing Chan is an internist in Alhambra, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Robert Wing Chan practice?
Dr. Chan practices at 409 W Main St, Alhambra, CA 91801. Dr. Chan's primary practice is Ros Medical Group Inc in Alhambra, California. Dmand AI also links Dr. Chan to 1 physician office, 1 group practice or clinic, 1 home health agency, 1 hospice and 1 skilled nursing facility.
What is Dr. Robert Wing Chan's office phone number?
The practice phone on file for Dr. Chan is (626) 382-1263.
What is Dr. Robert Wing Chan's medical license number?
Dr. Chan holds California license A67678.
What medical group is Dr. Robert Wing Chan part of?
Dr. Chan is linked to Ros Medical Group.
Does Dr. Robert Wing Chan accept Medicare?
Yes. CMS data shows Dr. Chan billed Medicare for 8,490 services in 2024, and Dr. Chan accepts Medicare assignment.
Does Dr. Robert Wing Chan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chan as offering telehealth services.
How many Medicare patients does Dr. Robert Wing Chan see?
CMS counts 470 Medicare patients who saw Dr. Chan in 2024, with an average age of 75.
What services does Dr. Robert Wing Chan bill to Medicare?
In 2024, Dr. Chan's most billed Medicare services were care management and other visits (99490), office visit, established patient (99213) and medicare service (G2012).
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Where did Dr. Robert Wing Chan go to medical school?
Dr. Chan graduated from UC Irvine School of Medicine in 1997.
What drugs does Dr. Robert Wing Chan prescribe most?
In 2024 Medicare Part D data, Dr. Chan's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Amlodipine Besylate.
Has Dr. Robert Wing Chan received payments from drug or device companies?
CMS Open Payments shows $38,774 in general payments to Dr. Chan from 48 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Robert Wing Chan been practicing?
Dr. Chan graduated from medical school in 1997, 29 years ago.
What insurance does Dr. Robert Wing Chan accept?
Dr. Chan is in network with 10 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
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