Desmond T.y. Tan, M.D.
Internal Medicine Physician · Elk Grove, CA
Desmond T.y. Tan, M.D. is an internal medicine physician with a practice address in Elk Grove, California, and NPI 1780625863, issued on Jun 9, 2006. Check the license (California C53075, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Desmond T.y. Tan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C53075 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9201 Big Horn Blvd, Elk Grove, CA 95758
- Phone
- (916) 478-5100
- Enumerated
- Jun 9, 2006
- Record last updated
- Dec 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 001970260 PA
- Medicare enrollment
- Enrolled (PECOS I20081028000043); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 9201 Big Horn Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Desmond T.y. Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C53075Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% more Medicare Part D claims than the average internal medicine physician in 2024
4,620 Medicare Part D claims for 566 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 61 claims were for opioids.
Most prescribed
- Atorvastatin Calcium370 claims
- Losartan Potassium268 claims
- Levothyroxine Sodium204 claims
- Lisinopril200 claims
- Amlodipine Besylate196 claims
- Hydrochlorothiazide168 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.
Bills Medicare through one group practice
- Permanente Medical Group IncElk Grove, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Desmond T.y. Tan among 17,696 internal medicine physician records in California
Desmond T.y. Tan, M.D. 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2000 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 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).
38 internal medicine physician records list a practice address in Elk Grove
They are 38 of the 3,596 NPPES records with a practice address in Elk Grove, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Elk Grove → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Todd Fisher, M.D.Sacramento, CA 957581689610388
- Eddy Joelson, M.D.Elk Grove, CA 957581043294580
- Jojo Joves, MDElk Grove, CA 957581356429070
- Lisa Marelich, MDElk Grove, CA 957581417035130
- Luu Nguyen, MDElk Grove, CA 957581417035148
- Edward Pagliere, MDElk Grove, CA 957581518045228
- Shahin Shahbazi, MDElk Grove, CA 957581265510994
- Paolo Troia-Cancio, M.D.Elk Grove, CA 957581538141619
Common questions
What is Desmond T.y. Tan, M.D.'s NPI number?
Desmond T.y. Tan, M.D.'s National Provider Identifier (NPI) is 1780625863, issued on Jun 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Desmond T.y. Tan, M.D. located?
The NPPES record lists a practice address at 9201 Big Horn Blvd, Elk Grove, CA, 95758. Phone: (916) 478-5100. Providers update this record themselves, so call before visiting.
How can I verify Desmond T.y. Tan, M.D.'s license?
NPPES lists California license number C53075, 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 Desmond T.y. Tan, M.D. prescribe under Medicare Part D?
In 2024, Desmond T.y. Tan, M.D. had 4,620 Medicare Part D claims for 566 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.