Therese Anne Chan Tack, D.O
Internal Medicine Physician · San Francisco, CA
Therese Anne Chan Tack, D.O is an internal medicine physician with a practice address in San Francisco, California, and NPI 1750569950, issued on Feb 11, 2008. Check the license (California 20A10551, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Therese Anne Chan Tack
- Credential
- D.O
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A10551 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3937 25TH St, San Francisco, CA 94114
- Phone
- (415) 294-1462
- Enumerated
- Feb 11, 2008
- Record last updated
- Feb 26, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130824000085); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Therese Anne Chan Tack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A10551Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,284 Medicare Part D claims for 458 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 64 claims were for opioids.
Most prescribed
- Atorvastatin Calcium215 claims
- Amlodipine Besylate126 claims
- Metformin Hcl93 claims
- Levothyroxine Sodium85 claims
- Rosuvastatin Calcium69 claims
- Losartan Potassium58 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 74.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Ucsf Medical Group Business ServicesSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Therese Anne Chan Tack among 17,696 internal medicine physician records in California
Therese Anne Chan Tack, D.O is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2007 · median 2004 among the 11,065 with a school on file
- Record last updated2013 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,318 internal medicine physician records list a practice address in San Francisco
They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Francisco → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Virginia Cafaro, MDSan Francisco, CA 941141174596969
- Lisa Capaldini, MDSan Francisco, CA 941141841249240
- Jenny-Viva Collisson, MDSan Francisco, CA 941141841223567
- Louis Cubba, MDSan Francisco, CA 941141649201716
- Toby Dyner, M.D.San Francisco, CA 941141447357330
- Jaime Eisen, M.D.San Francisco, CA 941141932295565
- Mark Higgins, MDSan Francisco, CA 941141134193469
- Cory Hussain, M.D.San Francisco, CA 941141952368409
Common questions
What is Therese Anne Chan Tack, D.O's NPI number?
Therese Anne Chan Tack, D.O's National Provider Identifier (NPI) is 1750569950, issued on Feb 11, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Therese Anne Chan Tack, D.O located?
The NPPES record lists a practice address at 3937 25TH St, San Francisco, CA, 94114. Phone: (415) 294-1462. Providers update this record themselves, so call before visiting.
How can I verify Therese Anne Chan Tack, D.O's license?
NPPES lists California license number 20A10551, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Therese Anne Chan Tack, D.O prescribe under Medicare Part D?
In 2024, Therese Anne Chan Tack, D.O had 2,284 Medicare Part D claims for 458 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Therese Anne Chan Tack, D.O's MIPS final score?
The 2023 MIPS final score is 74.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.