Dr. Ei Ei Tun, MD
- Part D claims, 2024
- 271
- Hospital affiliations
- 1
- Industry payments
- $36
- Medical group
- 1
- State license
- 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. Tun's professional email, personal email and mobile number
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Dr. Ei Ei Tun is an internist in Santa Clara, California
Dr. Tun practices at Permanente Medical Group Inc in Santa Clara, California.
Dr. Tun's NPI, 1184366775, was assigned on April 13, 2022. Dr. Tun holds California license A202290.
- NPI
- 1184366775NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254715675
- NPI enumeration date
- April 13, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (408) 851-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ei Ei Tun practices at Permanente Medical Group Inc in Santa Clara, California
Dr. Tun'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. Ei Ei Tun is affiliated with 2 sites of care and 1 medical group
Dr. Tun's primary practice is Permanente Medical Group Inc in Santa Clara, California. Dr. Tun is also affiliated with Santa Clara Medical Center. The medical group on file is The Permanente Medical Group, Inc.
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. Ei Ei Tun's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tun practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Permanente Medical Group Inc | 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. Ei Ei Tun is one of 16,751 internists in California
Internal medicine is Dr. Tun's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Tun is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Tun
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. Ei Ei Tun's patients have a median age of 52
Across all payers, Dmand AI patient panel data puts Dr. Tun's median patient age at 52, with 64% women.
Dr. Tun's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women64%
- Men36%
Source: Dmand AI Patient Panel Data
Dr. Ei Ei Tun wrote 271 Medicare Part D claims in 2024
In 2024, Dr. Tun wrote 271 Medicare Part D claims for 46 patients. 85% of them were for generic drugs. CMS names the drug for 125 of them, across 7 drugs with 11 or more claims each, at $1,658 in total drug cost.
Dr. Tun's Part D claims by kind of drug, 2024
- Generic229 claims85%
- Brand-name42 claims15%
Dr. Tun'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.
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. Ei Ei Tun takes part in Medicare
Dr. Tun 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. Ei Ei Tun received $36 in industry payments from 2024 to 2025
CMS Open Payments shows 2 general payments to Dr. Tun from 2 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Exact Sciences Corporation paid the most, $19.
General payments to Dr. Tun by program year, 2024 to 2025
Companies that paid Dr. Tun the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ei Ei Tun'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Ei Ei Tun
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. Ei Ei Tun's NPI number?
Dr. Ei Ei Tun's NPI number is 1184366775. It was assigned on April 13, 2022, and it is active in the NPI Registry.
What kind of doctor is Dr. Ei Ei Tun?
Dr. Ei Ei Tun is an internist in Santa Clara, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ei Ei Tun practice?
Dr. Tun practices at 710 Lawrence Expy, Santa Clara, CA 95051. Dr. Tun's primary practice is Permanente Medical Group Inc in Santa Clara, California.
What is Dr. Ei Ei Tun's office phone number?
The practice phone on file for Dr. Tun is (408) 851-1000.
What is Dr. Ei Ei Tun's medical license number?
Dr. Tun holds California license A202290, one of 2 state licenses on file.
Which hospitals is Dr. Ei Ei Tun affiliated with?
Dr. Tun is affiliated with Santa Clara Medical Center.
What medical group is Dr. Ei Ei Tun part of?
Dr. Tun is linked to The Permanente Medical Group, Inc.
Does Dr. Ei Ei Tun accept Medicare?
Yes. CMS lists Dr. Tun as accepting Medicare assignment.
What drugs does Dr. Ei Ei Tun prescribe most?
In 2024 Medicare Part D data, Dr. Tun's most prescribed drugs by claims were Atorvastatin Calcium, Rosuvastatin Calcium and Lisinopril.
Has Dr. Ei Ei Tun received payments from drug or device companies?
CMS Open Payments shows $36 in general payments to Dr. Tun from 2 companies from 2024 to 2025. The largest total came from Exact Sciences Corporation.
How long has Dr. Ei Ei Tun been practicing?
Dr. Tun graduated from medical school in 2011, 15 years ago.
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