Dr. Ann Phan, DO
- Medicare services, 2024
- 107
- Medicare patients, 2024
- 84
- Part D claims, 2024
- 390
- Publications
- 3
- Affiliated sites
- 2
- Practice address
- 3200 Kearney Street, Fremont, CA 94538
- Practice phone
- Call (510) 498-2812
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Palo Alto Medical Foundation-Fremont Center
Mammography / Breast Imaging Center · Fremont, 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. Ann Phan is an internist in Fremont, California
Dr. Phan practices at Palo Alto Medical Foundation-Fremont Center in Fremont, California.
Dr. Phan's NPI, 1912526179, was assigned on April 8, 2020. Dr. Phan graduated from WesternU College of Osteopathic Medicine of the Pacific in 2020. Dr. Phan holds California license 20A20914.
- NPI
- 1912526179NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587028766
- NPI enumeration date
- April 8, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (510) 498-2812
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ann Phan practices at Palo Alto Medical Foundation-Fremont Center in Fremont, California
Dr. Phan's primary practice is Palo Alto Medical Foundation-Fremont Center, at 3200 Kearney Street, Fremont, CA 94538. The practice phone is (510) 498-2812.
- Palo Alto Medical Foundation-Fremont Center3200 Kearney Street, Fremont, CA 94538Phone(510) 498-2812
Source: Dmand AI Affiliation Data
Dr. Ann Phan is affiliated with 2 sites of care and 1 medical group
Dr. Phan's primary practice is Palo Alto Medical Foundation-Fremont Center in Fremont, California. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Phan to 1 more group practice or clinic, named with a free account. Dr. Phan's employer is on file too: a breast imaging center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ann 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 |
|---|---|
| Palo Alto Medical Foundation-Fremont Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ann 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 board certified in internal medicine by the American Board of Internal Medicine. 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. Ann Phan billed Medicare for 107 services in 2024
CMS data shows 107 Medicare services from Dr. Phan across 3 procedure codes in 2024, for 84 Medicare patients. Medicare paid $10,882 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: 272024: 89230%
- Other services
- 2023: 02024: 18
Dr. Phan compared with the California median for internists, 2024
- Dr. Phan
- California median
- Medicare services
- 107vs 36170% below
- Medicare patients
- 84vs 15144% below
- Part D claims
- 127vs 42170% below
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. Ann Phan treated 84 Medicare patients in 2024, average age 74
CMS counts 84 Medicare patients who saw Dr. Phan in 2024. The largest group is 65 to 74, with 48 patients. 62% of them have high blood pressure, and 60% have high cholesterol. 15% are also on Medicaid. Their average risk score is 0.73, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Phan's median patient age at 43, with 77% 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
- Women6679%
- Men1821%
Chronic conditions among Dr. Phan's Medicare patients, 2024
- High blood pressure62%
- High cholesterol60%
- Arthritis31%
- Diabetes30%
- Osteoporosis21%
- Anxiety18%
- Ischemic heart disease17%
- Atrial fibrillation15%
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 43
Patient panel by sex, all payers
- Women77%
- Men21%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ann Phan wrote 390 Medicare Part D claims in 2024
In 2024, Dr. Phan wrote 390 Medicare Part D claims for 83 patients. 87% of them were for generic drugs. CMS names the drug for 127 of them, across 7 drugs with 11 or more claims each, at $1,257 in total drug cost.
Dr. Phan's Part D claims by kind of drug, 2024
- Generic341 claims87%
- Brand-name and other49 claims13%
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
- Antibiotics4%16 of 390 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Ann Phan offers telehealth to Medicare patients
Dr. Phan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Phan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ann Phan has 3 publications on record
Dmand AI links 3 papers to Dr. Phan, published from 2019 to 2023. Dr. Phan's most frequent co-authors are Patrick C. Tso, MD and Benjamin Kai Pan Woo, MD.
Dr. Phan's most frequent co-authors
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. Ann Phan graduated from WesternU College of Osteopathic Medicine of the Pacific
Dr. Phan graduated from WesternU College of Osteopathic Medicine of the Pacific in 2020.
- Medical school
- Board certified in internal medicine
- Board certified in 2023 - 2027
Source: Dmand AI Professional Profile Data
Dr. Ann Phan accepts plans from 11 insurance carriers
Dr. Phan is in network with 11 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Elevance
- Blue Cross Blue Shield of Michigan
- HCSC
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- +3 more carriersWith a free account
Plan types Dr. Phan accepts, by number of carriers
- PPO7
- HMO6
- EPO4
- Medicare3
- POS2
Source: Dmand AI Insurance Network Data
Sources for Dr. Ann 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 | 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Ann 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. Ann Phan's NPI number?
Dr. Ann Phan's NPI number is 1912526179. It was assigned on April 8, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Ann Phan?
Dr. Ann Phan is an internist in Fremont, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ann Phan practice?
Dr. Phan practices at 3200 Kearney Street, Fremont, CA 94538. Dr. Phan's primary practice is Palo Alto Medical Foundation-Fremont Center in Fremont, California. Dmand AI also links Dr. Phan to 1 group practice or clinic.
What is Dr. Ann Phan's office phone number?
The practice phone on file for Dr. Phan is (510) 498-2812.
What is Dr. Ann Phan's medical license number?
Dr. Phan holds California license 20A20914.
What medical group is Dr. Ann Phan part of?
Dr. Phan is linked to Palo Alto Foundation Medical Group.
Does Dr. Ann Phan accept Medicare?
Yes. CMS data shows Dr. Phan billed Medicare for 107 services in 2024, and Dr. Phan accepts Medicare assignment.
Does Dr. Ann Phan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Phan as offering telehealth services.
How many Medicare patients does Dr. Ann Phan see?
CMS counts 84 Medicare patients who saw Dr. Phan in 2024, with an average age of 74.
Is Dr. Ann Phan board certified?
Yes. Dr. Phan is board certified in internal medicine by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Ann Phan bill to Medicare?
In 2024, Dr. Phan's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0439).
Where did Dr. Ann Phan go to medical school?
Dr. Phan graduated from WesternU College of Osteopathic Medicine of the Pacific in 2020.
What drugs does Dr. Ann Phan prescribe most?
In 2024 Medicare Part D data, Dr. Phan's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Amlodipine Besylate.
How long has Dr. Ann Phan been practicing?
Dr. Phan graduated from medical school in 2020, 6 years ago.
Does Dr. Ann Phan do research?
Dmand AI links 3 publications to Dr. Phan, published from 2019 to 2023.
Who does Dr. Ann Phan publish with?
Dr. Phan's most frequent co-authors are Patrick C. Tso, MD (1 shared paper) and Benjamin Kai Pan Woo, MD (1 shared paper).
What insurance does Dr. Ann Phan accept?
Dr. Phan is in network with 11 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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