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Dr. Michael Kam-Hong Kwok, MD
NPI1124119235PAC ID5294893327
- Medicare services, 2024
- 300
- Medicare patients, 2024
- 106
- Part D claims, 2024
- 2,284
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 250 Bon Air Road, Greenbrae, CA 94904
- Practice phone
- Call (415) 925-7900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Kwok'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. Michael Kam-Hong Kwok is an internist in Greenbrae, California
Dr. Kwok practices at MarinHealth Medical Center in Greenbrae, California, part of Marin Healthcare District.
Dr. Kwok's NPI, 1124119235, was assigned on September 27, 2006. Dr. Kwok graduated from David Geffen School of Medicine at UCLA in 1989. Dr. Kwok holds California license G069555.
NPI and contact details
- NPI
- 1124119235NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5294893327
- NPI enumeration date
- September 27, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 925-7900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Kam-Hong Kwok practices at MarinHealth Medical Center in Greenbrae, California
Dr. Kwok's primary practice is MarinHealth Medical Center, at 250 Bon Air Road, Greenbrae, CA 94904 in Marin County. The practice phone is (415) 925-7900.
- MarinHealth Medical Center250 Bon Air Road, Greenbrae, CA 94904 · Marin CountyPhone(415) 925-7900
Source: Dmand AI Affiliation Data
Dr. Michael Kam-Hong Kwok is affiliated with 6 sites of care and 1 medical group
Dr. Kwok's primary practice is MarinHealth Medical Center in Greenbrae, California, part of Marin Healthcare District. Dr. Kwok is also affiliated with Novato Community Hospital. The medical group on file is Marin Hospitalist Medical Group. Dmand AI also links Dr. Kwok to 2 more physician offices and 2 home health agencies, each named with a free account.
Novato Community HospitalMarin Hospitalist Medical Group2 physician officesNames with a free account2 home health agenciesNames with a free account
See all 7 affiliations for Dr. KwokSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Kam-Hong Kwok's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kwok practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MarinHealth Medical Center | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Michael Kam-Hong Kwok is one of 16,751 internists in California
Internal medicine is Dr. Kwok's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Kwok is board certified in internal medicine by the American Board of Internal Medicine. Dr. Kwok is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute gastroduodenitis, acute skin infection, adjustment disease, alzheimer's disease, aneurysm, ankle or foot injury, arthritis and asthma among the conditions Dr. Kwok treats.
Internists near Dr. Kwok
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. Michael Kam-Hong Kwok billed Medicare for 300 services in 2024
CMS data shows 300 Medicare services from Dr. Kwok across 9 procedure codes in 2024, for 106 Medicare patients. Medicare paid $29,380 for them.
Medicare services, 2024300
Medicare patients106
Paid by Medicare$29,380
Procedure codes9
Dr. Kwok's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3462024: 22934%
- Tests and treatments
- 2023: 262024: 4158%
- Other services
- 2023: 02024: 30
Where Dr. Kwok's Medicare services took place, 2024
- In an office24381%
- In a facility5719%
Dr. Kwok compared with the California median for internists, 2024
- Dr. Kwok
- California median
- Medicare services
- 300vs 36117% below
- Medicare patients
- 106vs 15130% below
- Part D claims
- 1,846vs 4214.4 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Kwok'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. Kwok?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kwok and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Kam-Hong Kwok treated 106 Medicare patients in 2024, average age 81
CMS counts 106 Medicare patients who saw Dr. Kwok in 2024. The largest group is 75 to 84, with 51 patients. 75% of them have high cholesterol, and 68% have high blood pressure. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Kwok's median patient age at 79, with 52% women.
Medicare patients, 2024106
Average age81
Average risk score0.99
Dr. Kwok's Medicare patients by age, 2024
Dr. Kwok's Medicare patients by sex, 2024
- Women4845%
- Men5855%
Chronic conditions among Dr. Kwok's Medicare patients, 2024
- High cholesterol75%
- High blood pressure68%
- Arthritis53%
- Ischemic heart disease42%
- Atrial fibrillation22%
- Cancer22%
- Chronic kidney disease22%
- Anxiety16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kwok's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 79
Patient panel by sex, all payers
- Women52%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Kam-Hong Kwok wrote 2,284 Medicare Part D claims in 2024
In 2024, Dr. Kwok wrote 2,284 Medicare Part D claims for 143 patients. 90% of them were for generic drugs. CMS names the drug for 1,846 of them, across 54 drugs with 11 or more claims each, at $80,526 in total drug cost. In 2023, CMS named 1,688 claims across 52 drugs.
Part D claims, 20242,284
Drugs named by CMS54
Total drug cost$80,526
Part D patients143
Dr. Kwok's Part D claims by kind of drug, 2024
- Generic2,058 claims90%
- Brand-name and other226 claims10%
Dr. Kwok'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. Kwok's Part D claims, 2024
- Opioids3%68 of 2,284 claims
- Antibiotics2%44 of 2,284 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: 1,6882024: 1,8469%
Drugs named by CMS: 54 in 2024, 52 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. Michael Kam-Hong Kwok takes part in Medicare
Dr. Kwok accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Michael Kam-Hong Kwok has 1 publication on record
Dmand AI links 1 paper to Dr. Kwok.
Papers1
Recent publications by Dr. Kwok
See who Dr. Kwok researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kwok works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Michael Kam-Hong Kwok received $3,784 in industry payments from 2016 to 2025
CMS Open Payments shows 142 general payments to Dr. Kwok from 32 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. HeartFlow, Inc. paid the most, $485.
General payments to Dr. Kwok by program year, 2016 to 2025
General payments to Dr. Kwok by kind, 2016 to 2025
$3.8Kin total
- Food and beverage$3,770100%
- Education$140%
Companies that paid Dr. Kwok 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. Michael Kam-Hong Kwok has 1 award and honors on record
Dmand AI lists 1 award for Dr. Kwok.
Awards and honors for Dr. Kwok
- Undated
- Checkbook Top Doc
Source: Dmand AI Professional Profile Data
Dr. Michael Kam-Hong Kwok graduated from David Geffen School of Medicine at UCLA
Dr. Kwok graduated from David Geffen School of Medicine at UCLA in 1989.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Michael Kam-Hong Kwok accepts plans from 2 insurance carriers
Dr. Kwok is in network with 2 carriers, including Excellus BlueCross BlueShield and CMS Medicare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Excellus BlueCross BlueShield
- CMS Medicare
Plan types Dr. Kwok accepts, by number of carriers
- Medicare2
- EPO1
- HMO1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael Kam-Hong Kwok'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) |
| 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. Michael Kam-Hong Kwok
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. Michael Kam-Hong Kwok's NPI number?
Dr. Michael Kam-Hong Kwok's NPI number is 1124119235. It was assigned on September 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Kam-Hong Kwok?
Dr. Michael Kam-Hong Kwok is an internist in Greenbrae, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Michael Kam-Hong Kwok practice?
Dr. Kwok practices at 250 Bon Air Road, Greenbrae, CA 94904. Dr. Kwok's primary practice is MarinHealth Medical Center in Greenbrae, California, part of Marin Healthcare District. Dmand AI also links Dr. Kwok to 2 physician offices and 2 home health agencies.
What is Dr. Michael Kam-Hong Kwok's office phone number?
The practice phone on file for Dr. Kwok is (415) 925-7900.
What is Dr. Michael Kam-Hong Kwok's medical license number?
Dr. Kwok holds California license G069555.
Which hospitals is Dr. Michael Kam-Hong Kwok affiliated with?
Dr. Kwok practices at MarinHealth Medical Center in Greenbrae, California. Dr. Kwok is also affiliated with Novato Community Hospital.
What medical group is Dr. Michael Kam-Hong Kwok part of?
Dr. Kwok is linked to Marin Hospitalist Medical Group.
Does Dr. Michael Kam-Hong Kwok accept Medicare?
Yes. CMS data shows Dr. Kwok billed Medicare for 300 services in 2024, and Dr. Kwok accepts Medicare assignment.
How many Medicare patients does Dr. Michael Kam-Hong Kwok see?
CMS counts 106 Medicare patients who saw Dr. Kwok in 2024, with an average age of 81.
Is Dr. Michael Kam-Hong Kwok board certified?
Yes. Dr. Kwok is board certified in internal medicine by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Michael Kam-Hong Kwok bill to Medicare?
In 2024, Dr. Kwok's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and office visit, established patient (99215).
Where did Dr. Michael Kam-Hong Kwok go to medical school?
Dr. Kwok graduated from David Geffen School of Medicine at UCLA in 1989.
What drugs does Dr. Michael Kam-Hong Kwok prescribe most?
In 2024 Medicare Part D data, Dr. Kwok's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Rosuvastatin Calcium.
Has Dr. Michael Kam-Hong Kwok received payments from drug or device companies?
CMS Open Payments shows $3,784 in general payments to Dr. Kwok from 32 companies from 2016 to 2025. The largest total came from HeartFlow, Inc.
How long has Dr. Michael Kam-Hong Kwok been practicing?
Dr. Kwok graduated from medical school in 1989, 37 years ago.
Does Dr. Michael Kam-Hong Kwok do research?
Dmand AI links 1 publication to Dr. Kwok.
What insurance does Dr. Michael Kam-Hong Kwok accept?
Dr. Kwok is in network with 2 carriers, including Excellus BlueCross BlueShield and CMS Medicare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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