Cheng-Yang Christian Tuan, MD
Endocrinology, Diabetes & Metabolism Physician · San Francisco, CA
Cheng-Yang Christian Tuan, MD is an endocrinology, diabetes & metabolism physician with a practice address in San Francisco, California, and NPI 1891746129, issued on May 12, 2006. Check the license (California A67915, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cheng-Yang Christian Tuan
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A67915 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1580 Valencia St, San Francisco, CA 94110
- Phone
- (415) 695-7661
- Enumerated
- May 12, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 695-7665
- Medicare enrollment
- Enrolled (PECOS I20060818000350); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 1580 Valencia St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Cheng-Yang Christian Tuan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A67915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.0 times the Medicare Part D claims of the average endocrinology, diabetes & metabolism physician in 2024
13,019 Medicare Part D claims for 1,052 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 50% of claims.
Most prescribed
- Jardiance1,216 claims
- Ozempic1,180 claims
- Metformin Hcl Er950 claims
- Levothyroxine Sodium843 claims
- Atorvastatin Calcium761 claims
- Metformin Hcl485 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 MIPS final score for 2023 (Medicare payment program): 23 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $81,022.30
304 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Cheng-Yang Christian Tuan among 1,131 endocrinology, diabetes & metabolism physician records in California
Cheng-Yang Christian Tuan, MD is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% 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, 54% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1997 · median 2003 among the 779 with a school on file
- Record last updated2007 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in San Francisco → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Nancy Bohannon, M.D.San Francisco, CA 941101063428001
- Marisa Cruz, M.D.San Francisco, CA 941101053632216
- Kristine Gu, MDSan Francisco, CA 941101033614888
- Marc Hellerstein, M.D.San Francisco, CA 941101780884098
- Anand Mehta, M.D.San Francisco, CA 941101992902605
- Jennifer Park-Sigal, MDSan Francisco, CA 941101790992998
- Morris Schambelan, MDSan Francisco, CA 941101457421299
- Eckehart Wiedemann, M.D.San Francisco, CA 941101649470956
Common questions
What is Cheng-Yang Christian Tuan, MD's NPI number?
Cheng-Yang Christian Tuan, MD's National Provider Identifier (NPI) is 1891746129, issued on May 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cheng-Yang Christian Tuan, MD located?
The NPPES record lists a practice address at 1580 Valencia St, San Francisco, CA, 94110. Phone: (415) 695-7661. Providers update this record themselves, so call before visiting.
How can I verify Cheng-Yang Christian Tuan, MD's license?
NPPES lists California license number A67915, 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 Cheng-Yang Christian Tuan, MD prescribe under Medicare Part D?
In 2024, Cheng-Yang Christian Tuan, MD had 13,019 Medicare Part D claims for 1,052 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Cheng-Yang Christian Tuan, MD's MIPS final score?
The 2023 MIPS final score is 23 of 100. 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.