Dr. Charles A. Poon, MD
- Medicare services, 2020
- 23
- Medicare patients, 2024
- 15
- Part D claims, 2024
- 407
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 710 Lawrence Expy, Santa Clara, CA 95051
- Practice phone
- Call (408) 851-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Santa Clara, California
Find Dr. Poon'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. Charles A. Poon is an internist in Santa Clara, California
Dr. Poon practices at Permanente Medical Group Inc in Santa Clara, California.
Dr. Poon's NPI, 1245475334, was assigned on December 3, 2008. Dr. Poon graduated from Loma Linda University School Of Medicine in 2006. Dr. Poon holds California license A103158.
- NPI
- 1245475334NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335263623
- NPI enumeration date
- December 3, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (408) 851-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Charles A. Poon practices at Permanente Medical Group Inc in Santa Clara, California
Dr. Poon's primary practice is Permanente Medical Group Inc, at 710 Lawrence Expy, Santa Clara, CA 95051 in Santa Clara County. The practice phone is (408) 851-1000.
- Permanente Medical Group Inc710 Lawrence Expy, Santa Clara, CA 95051 · Santa Clara CountyPhone(408) 851-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Charles A. Poon is affiliated with 3 sites of care and 1 medical group
Dr. Poon's primary practice is Permanente Medical Group Inc in Santa Clara, California. Dr. Poon is also affiliated with Santa Clara Medical Center. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Poon to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Charles A. Poon's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Poon practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Permanente Medical Group Inc | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Charles A. Poon is one of 16,751 internists in California
Internal medicine is Dr. Poon's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Poon is board certified in critical care medicine by the American Board of Internal Medicine. Dr. Poon is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Poon
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. Charles A. Poon billed Medicare for 23 services in 2020
CMS data shows 23 Medicare services from Dr. Poon across 1 procedure code in 2020, for 15 Medicare patients. Medicare paid $1,529 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Poon compared with the California median for internists, 2020
- Dr. Poon
- California median
- Medicare services
- 23vs 36194% below
- Medicare patients
- 15vs 15190% below
- Part D claims
- 284vs 42133% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Poon's most billed Medicare procedure codes, 2020
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. Poon?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Poon and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Charles A. Poon treated 15 Medicare patients in 2024, average age 73
CMS counts 15 Medicare patients who saw Dr. Poon in 2024. Their average risk score is 3.84, 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. Poon's median patient age at 58, with 45% women.
Dr. Poon's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women45%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Charles A. Poon wrote 407 Medicare Part D claims in 2024
In 2024, Dr. Poon wrote 407 Medicare Part D claims for 108 patients. 75% of them were for generic drugs. CMS names the drug for 284 of them, across 12 drugs with 11 or more claims each, at $54,916 in total drug cost. In 2023, CMS named 233 claims across 9 drugs.
Dr. Poon's Part D claims by kind of drug, 2024
- Generic307 claims75%
- Brand-name and other100 claims25%
Dr. Poon'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. Poon's Part D claims, 2024
- Antibiotics11%43 of 407 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: 2332024: 28422%
Drugs named by CMS: 12 in 2024, 9 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. Charles A. Poon offers telehealth to Medicare patients
Dr. Poon accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Poon as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Charles A. Poon has 1 publication on record
Dmand AI links 1 paper to Dr. Poon. Dr. Poon's most frequent co-authors are Tisha Shih-Yun Wang, MD and Michelle Raphaela Zeidler, MD.
Dr. Poon's most frequent co-authors
Recent publications by Dr. Poon
See who Dr. Poon researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Poon 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. Charles A. Poon received $150 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Poon from 1 drug or device company in 2025. Consulting fees make up the largest share, 100% of the total. Jazz Pharmaceuticals Inc. paid the most, $150.
Companies that paid Dr. Poon the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Charles A. Poon graduated from Loma Linda University School Of Medicine
Dr. Poon graduated from Loma Linda University School Of Medicine in 2006.
- Medical school
- Board certified in critical care medicine
- Board certified in internal medicine
- Board certified in pulmonary disease
- Board certified in sleep medicine
Source: Dmand AI Professional Profile Data
Dr. Charles A. Poon accepts plans from 2 insurance carriers
Dr. Poon is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Poon accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Charles A. Poon'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 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) |
| 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) |
| 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. Charles A. Poon
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. Charles A. Poon's NPI number?
Dr. Charles A. Poon's NPI number is 1245475334. It was assigned on December 3, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Charles A. Poon?
Dr. Charles A. Poon is an internist in Santa Clara, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Charles A. Poon practice?
Dr. Poon practices at 710 Lawrence Expy, Santa Clara, CA 95051. Dr. Poon's primary practice is Permanente Medical Group Inc in Santa Clara, California. Dmand AI also links Dr. Poon to 1 group practice or clinic.
What is Dr. Charles A. Poon's office phone number?
The practice phone on file for Dr. Poon is (408) 851-1000.
What is Dr. Charles A. Poon's medical license number?
Dr. Poon holds California license A103158.
Which hospitals is Dr. Charles A. Poon affiliated with?
Dr. Poon is affiliated with Santa Clara Medical Center.
What medical group is Dr. Charles A. Poon part of?
Dr. Poon is linked to The Permanente Medical Group, Inc.
Does Dr. Charles A. Poon accept Medicare?
Yes. CMS data shows Dr. Poon billed Medicare for 23 services in 2020, and Dr. Poon accepts Medicare assignment.
Does Dr. Charles A. Poon offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Poon as offering telehealth services.
How many Medicare patients does Dr. Charles A. Poon see?
CMS counts 15 Medicare patients who saw Dr. Poon in 2024, with an average age of 73.
Show 9 more questionsShow fewer questions
Is Dr. Charles A. Poon board certified?
Yes. Dr. Poon is board certified in critical care medicine by the American Board of Internal Medicine.
What services does Dr. Charles A. Poon bill to Medicare?
In 2020, Dr. Poon's most billed Medicare services were hospital inpatient care (99232).
Where did Dr. Charles A. Poon go to medical school?
Dr. Poon graduated from Loma Linda University School Of Medicine in 2006.
What drugs does Dr. Charles A. Poon prescribe most?
In 2024 Medicare Part D data, Dr. Poon's most prescribed drugs by claims were Breyna, Pirfenidone and Spiriva Respimat.
Has Dr. Charles A. Poon received payments from drug or device companies?
CMS Open Payments shows $150 in general payments to Dr. Poon from 1 company from 2025 to 2025. The largest total came from Jazz Pharmaceuticals Inc.
How long has Dr. Charles A. Poon been practicing?
Dr. Poon graduated from medical school in 2006, 20 years ago.
Does Dr. Charles A. Poon do research?
Dmand AI links 1 publication to Dr. Poon.
Who does Dr. Charles A. Poon publish with?
Dr. Poon's most frequent co-authors are Tisha Shih-Yun Wang, MD (1 shared paper) and Michelle Raphaela Zeidler, MD (1 shared paper).
What insurance does Dr. Charles A. Poon accept?
Dr. Poon is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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