Dr. Anthony Thong Phan, MD
- Medicare services, 2024
- 2,189
- Medicare patients, 2024
- 147
- Part D claims, 2024
- 2,320
- Publications
- 24
- Hospital affiliations
- 1
- Practice address
- 2925 N Sycamore Dr, Simi Valley, CA 93065
- Practice phone
- Call (805) 526-3213
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Anthony Thong Phan MD Inc
Simi Valley, California
Find Dr. Phan'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. Anthony Thong Phan is an internist in Simi Valley, California
Dr. Phan practices at Anthony Thong Phan MD Inc in Simi Valley, California.
Dr. Phan's NPI, 1124207006, was assigned on October 29, 2007. Dr. Phan graduated from University of Kansas School of Med (KC/Wich/Sal) in 1993. Dr. Phan holds California license G83470.
- NPI
- 1124207006NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103842471
- NPI enumeration date
- October 29, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 526-3213
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Anthony Thong Phan practices at Anthony Thong Phan MD Inc in Simi Valley, California
Dr. Phan's primary practice is Anthony Thong Phan MD Inc, at 2925 N Sycamore Dr, Simi Valley, CA 93065 in Ventura County. The practice phone is (805) 526-3213.
- Anthony Thong Phan MD Inc2925 N Sycamore Dr, Simi Valley, CA 93065 · Ventura CountyPhone(805) 526-3213
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Anthony Thong Phan is affiliated with 3 sites of care
Dr. Phan's primary practice is Anthony Thong Phan MD Inc in Simi Valley, California. Dr. Phan is also affiliated with Adventist Health Simi Valley. Dmand AI also links Dr. Phan to 1 more physician office, 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. Anthony Thong Phan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Phan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Anthony Thong Phan MD 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. Anthony Thong Phan is one of 16,751 internists in California
Internal medicine is Dr. Phan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Phan is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Phan
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. Anthony Thong Phan billed Medicare for 2,189 services in 2024
CMS data shows 2,189 Medicare services from Dr. Phan across 9 procedure codes in 2024, for 147 Medicare patients. Medicare paid $130,774 for them. Every service was in an office.
Dr. Phan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,4182024: 1,5177%
- Tests and treatments
- 2023: 3332024: 28514%
- Surgery
- 2023: 1222024: 14015%
- Lab and pathology
- 2023: 142024: 125793%
- Drugs given in the office
- 2023: 1722024: 12229%
Dr. Phan compared with the California median for internists, 2024
- Dr. Phan
- California median
- Medicare services
- 2,189vs 3616.1 times
- Medicare patients
- 147vs 151Close to median
- Part D claims
- 1,955vs 4214.6 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Phan'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. Phan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Phan and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Anthony Thong Phan treated 147 Medicare patients in 2024, average age 75
CMS counts 147 Medicare patients who saw Dr. Phan in 2024. The largest group is 65 to 74, with 72 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 0.92, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Phan's median patient age at 69, with 57% women.
Dr. Phan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Phan's Medicare patients by sex, 2024
- Women8256%
- Men6544%
Chronic conditions among Dr. Phan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes61%
- Arthritis39%
- Atrial fibrillation26%
- Chronic kidney disease19%
- Depression18%
- Mood disorders18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Phan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Anthony Thong Phan wrote 2,320 Medicare Part D claims in 2024
In 2024, Dr. Phan wrote 2,320 Medicare Part D claims for 231 patients. 80% of them were for generic drugs. CMS names the drug for 1,955 of them, across 59 drugs with 11 or more claims each, at $126,214 in total drug cost. In 2023, CMS named 2,239 claims across 65 drugs.
Dr. Phan's Part D claims by kind of drug, 2024
- Generic1,859 claims80%
- Brand-name311 claims13%
- Other150 claims6%
Dr. Phan'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. Phan's Part D claims, 2024
- Opioids3%66 of 2,320 claims
- Antibiotics8%175 of 2,320 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: 2,2392024: 1,95513%
Drugs named by CMS: 59 in 2024, 65 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. Anthony Thong Phan takes part in Medicare
Dr. Phan 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. Anthony Thong Phan has 24 publications on record
Dmand AI links 24 papers to Dr. Phan, published from 2013 to 2025. 2016 was the busiest year, with 3. The most frequent topics are CD8-Positive T-Lymphocytes, Lymphocyte Activation and Cell Differentiation. Dr. Phan has published most often in bioRxiv. Dr. Phan's most frequent co-authors are Drew Weissman, MD, Anita Ann Koshy, MD and Corbett T. Berry, MD.
Dr. Phan's papers by year, 2015 to 2025
Topics Dr. Phan writes about most
- CD8-Positive T-Lymphocytes
- Lymphocyte Activation
- Cell Differentiation
- Immunologic Memory
- T-Lymphocytes
- Toxoplasma
- Hypoxia-Inducible Factor 1, alpha Subunit
- Mice, Inbred C57BL
Dr. Phan's most frequent co-authors
- Drew Weissman, MD3 shared papers
- Anita Ann Koshy, MD2 shared papers
- Corbett T. Berry, MD1 shared paper
Recent publications by Dr. Phan
See who Dr. Phan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Phan 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. Anthony Thong Phan received $145 in industry payments from 2016 to 2024
CMS Open Payments shows 9 general payments to Dr. Phan from 5 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Novocure Inc. paid the most, $66.
General payments to Dr. Phan by program year, 2016 to 2024
Companies that paid Dr. Phan the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Anthony Thong Phan graduated from University of Kansas School of Med (KC/Wich/Sal)
Dr. Phan graduated from University of Kansas School of Med (KC/Wich/Sal) in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Anthony Thong Phan'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) |
| 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 |
| 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. Anthony Thong Phan
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. Anthony Thong Phan's NPI number?
Dr. Anthony Thong Phan's NPI number is 1124207006. It was assigned on October 29, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Anthony Thong Phan?
Dr. Anthony Thong Phan is an internist in Simi Valley, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Anthony Thong Phan practice?
Dr. Phan practices at 2925 N Sycamore Dr, Simi Valley, CA 93065. Dr. Phan's primary practice is Anthony Thong Phan MD Inc in Simi Valley, California. Dmand AI also links Dr. Phan to 1 physician office.
What is Dr. Anthony Thong Phan's office phone number?
The practice phone on file for Dr. Phan is (805) 526-3213.
What is Dr. Anthony Thong Phan's medical license number?
Dr. Phan holds California license G83470.
Which hospitals is Dr. Anthony Thong Phan affiliated with?
Dr. Phan is affiliated with Adventist Health Simi Valley.
Does Dr. Anthony Thong Phan accept Medicare?
Yes. CMS data shows Dr. Phan billed Medicare for 2,189 services in 2024, and Dr. Phan accepts Medicare assignment.
How many Medicare patients does Dr. Anthony Thong Phan see?
CMS counts 147 Medicare patients who saw Dr. Phan in 2024, with an average age of 75.
What services does Dr. Anthony Thong Phan bill to Medicare?
In 2024, Dr. Phan's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99212) and infusion or chemotherapy administration (96372).
Where did Dr. Anthony Thong Phan go to medical school?
Dr. Phan graduated from University of Kansas School of Med (KC/Wich/Sal) in 1993.
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What drugs does Dr. Anthony Thong Phan prescribe most?
In 2024 Medicare Part D data, Dr. Phan's most prescribed drugs by claims were Levothyroxine Sodium, Liothyronine Sodium and Metformin HCl.
Has Dr. Anthony Thong Phan received payments from drug or device companies?
CMS Open Payments shows $145 in general payments to Dr. Phan from 5 companies from 2016 to 2024. The largest total came from Novocure Inc.
How long has Dr. Anthony Thong Phan been practicing?
Dr. Phan graduated from medical school in 1993, 33 years ago.
Does Dr. Anthony Thong Phan do research?
Dmand AI links 24 publications to Dr. Phan, published from 2013 to 2025.
Who does Dr. Anthony Thong Phan publish with?
Dr. Phan's most frequent co-authors are Drew Weissman, MD (3 shared papers), Anita Ann Koshy, MD (2 shared papers) and Corbett T. Berry, MD (1 shared paper).
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