Debbie Choi Man Chan, MPA

  • Walnut Creek, CA
  • Physician assistant
NPI1891084117PAC ID7113174152
Medicare services, 2024
691
Medicare patients, 2024
515
Part D claims, 2024
2,936
Hospital affiliations
1
Industry payments
$4,959
Practice address
1450 Treat Blvd, Walnut Creek, CA 94597
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

John Muir Medical Center - Walnut C - Imaging - HOPD

Acute Care Hospital outpatient department · Walnut Creek, California

See all 7 affiliations

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Debbie Choi Man Chan is a physician assistant in Walnut Creek, California

Debbie Chan practices at John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California.

Debbie Chan's NPI, 1891084117, was assigned on April 7, 2011. Debbie Chan holds California license PA21538.

NPI and contact details
Medicare PAC ID
7113174152
NPI enumeration date
April 7, 2011
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Professional email
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Personal email
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Mobile number
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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)

Debbie Choi Man Chan practices at John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California

Debbie Chan's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD, at 1450 Treat Blvd, Walnut Creek, CA 94597.

  • John Muir Medical Center - Walnut C - Imaging - HOPD
    1450 Treat Blvd, Walnut Creek, CA 94597

Source: Dmand AI Affiliation Data

Debbie Choi Man Chan is affiliated with 4 sites of care and 3 medical groups

Debbie Chan's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California. Debbie Chan is also affiliated with Concord Medical Center. The medical group on file is Stanford Health Care. Dmand AI also links Debbie Chan to 2 more group practices and clinics and 2 medical groups, each named with a free account. Debbie Chan's employer is on file too: a hospital.

See all 7 affiliations for Debbie Chan

Source: Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Debbie Choi Man Chan's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Debbie Chan practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
John Muir Medical Center - Walnut C - Imaging - HOPDAvailable with a free account
+3 more sites and 2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Debbie Choi Man Chan is one of 11,482 physician assistants in California

Physician assistant is Debbie Chan's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Debbie Chan is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Debbie Chan is licensed in California.

Specialties and state licenses

  • Physician assistant, CaliforniaPrimaryLicense PA21538 · taxonomy 363A00000X

Clinical focus

Dmand AI lists chronic kidney disease, pleural effusion, sleep apnea and tobacco use among the conditions Debbie Chan treats.

Physician assistants near Debbie Chan

Counts of physician assistants 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

Debbie Choi Man Chan billed Medicare for 691 services in 2024

CMS data shows 691 Medicare services from Debbie Chan across 7 procedure codes in 2024, for 515 Medicare patients. Medicare paid $67,529 for them. Every service was in an office.

Medicare services, 2024691
Medicare patients515
Paid by Medicare$67,529
Procedure codes7

Debbie Chan's Medicare services by type, 2024

  1. Office and hospital visits598
  2. Tests and treatments67
  3. Other services26

Debbie Chan compared with the California median for physician assistants, 2024

  • Debbie Chan
  • California median
Medicare services
691vs 2043.4 times
Medicare patients
515vs 1054.9 times
Part D claims
2,679vs 24311.0 times

Medians across 7,065 physician assistants in California with Dmand AI profiles that report each measure.

Debbie 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.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Debbie Choi Man Chan treated 515 Medicare patients in 2024, average age 79

CMS counts 515 Medicare patients who saw Debbie Chan in 2024. The largest group is 75 to 84, with 231 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 12% are also on Medicaid. Their average risk score is 1.69, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Debbie Chan's median patient age at 78, with 46% women.

Medicare patients, 2024515
Average age79
Average risk score1.69
Also on Medicaid12%

Debbie Chan's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Debbie Chan's Medicare patients by sex, 2024

  • Women24948%
  • Men26652%

Chronic conditions among Debbie Chan's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Atrial fibrillation60%
  4. Ischemic heart disease53%
  5. Arthritis49%
  6. Heart failure42%
  7. Chronic kidney disease40%
  8. Diabetes27%

Share of Medicare patients with each condition. A patient can have several.

Debbie 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 78

Patient panel by sex, all payers

  • Women46%
  • Men50%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Debbie Choi Man Chan wrote 2,936 Medicare Part D claims in 2024

In 2024, Debbie Chan wrote 2,936 Medicare Part D claims for 1,241 patients. 78% of them were for generic drugs. CMS names the drug for 2,679 of them, across 44 drugs with 11 or more claims each, at $840,627 in total drug cost.

Part D claims, 20242,936
Drugs named by CMS44
Total drug cost$840,627
Part D patients1,241

Debbie Chan's Part D claims by kind of drug, 2024

  • Generic2,278 claims78%
  • Brand-name658 claims22%

Debbie 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.

See all prescribing by Debbie Chan

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

Debbie Choi Man Chan offers telehealth to Medicare patients

Debbie Chan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Debbie Chan as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Debbie Choi Man Chan received $4,959 in industry payments from 2024 to 2025

CMS Open Payments shows 184 general payments to Debbie Chan from 32 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. AOP Health US, LLC paid the most, $812.

General payments to Debbie Chan by program year, 2024 to 2025

Companies that paid Debbie Chan the most, 2024 to 2025

Share is of all general payments to this clinician.

See all payments to Debbie Chan

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Debbie Choi Man Chan is board certified in certified physician assistant

Debbie Chan is a member of AAPA.

  1. Board certified in certified physician assistantNational Commission on Certification of Physician Assistants (NCCPA)

Source: Dmand AI Professional Profile Data

Sources for Debbie Choi Man Chan's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Debbie Choi Man 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 Debbie Choi Man Chan's NPI number?

Debbie Choi Man Chan's NPI number is 1891084117. It was assigned on April 7, 2011, and it is active in the NPI Registry.

What does Debbie Choi Man Chan specialize in?

Debbie Choi Man Chan is a physician assistant in Walnut Creek, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).

Where does Debbie Choi Man Chan practice?

Debbie Chan practices at 1450 Treat Blvd, Walnut Creek, CA 94597. Debbie Chan's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California. Dmand AI also links Debbie Chan to 2 group practices and clinics and 2 medical groups.

What is Debbie Choi Man Chan's medical license number?

Debbie Chan holds California license PA21538.

Which hospitals is Debbie Choi Man Chan affiliated with?

Debbie Chan is affiliated with Concord Medical Center.

What medical group is Debbie Choi Man Chan part of?

Debbie Chan is linked to Stanford Health Care. Dmand AI links Debbie Chan to 2 more medical groups.

Does Debbie Choi Man Chan accept Medicare?

Yes. CMS data shows Debbie Chan billed Medicare for 691 services in 2024, and Debbie Chan accepts Medicare assignment.

Does Debbie Choi Man Chan offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Debbie Chan as offering telehealth services.

How many Medicare patients does Debbie Choi Man Chan see?

CMS counts 515 Medicare patients who saw Debbie Chan in 2024, with an average age of 79.

Is Debbie Choi Man Chan board certified?

Yes. Debbie Chan is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).

Show 4 more questionsShow fewer questions

What services does Debbie Choi Man Chan bill to Medicare?

In 2024, Debbie Chan's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and heart test or procedure (93280).

What drugs does Debbie Choi Man Chan prescribe most?

In 2024 Medicare Part D data, Debbie Chan's most prescribed drugs by claims were Eliquis, Atorvastatin Calcium and Metoprolol Succinate.

Has Debbie Choi Man Chan received payments from drug or device companies?

CMS Open Payments shows $4,959 in general payments to Debbie Chan from 32 companies from 2024 to 2025. The largest total came from AOP Health US, LLC.

How long has Debbie Choi Man Chan been practicing?

Debbie Chan graduated from medical school in 2011, 15 years ago.

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