Stephanie P. Chen, MD
Cornea and External Diseases Specialist Physician · Los Altos, CA
Stephanie P. Chen, MD is a cornea and external diseases specialist physician with a practice address in Los Altos, California, and NPI 1629572136, issued on Mar 20, 2018. Check the license (California A165180, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephanie P. Chen
- Credential
- MD
- Primary taxonomy
- Cornea and External Diseases Specialist Physician 207WX0120X
- License number
- A165180 CA
Self-reported in NPPES; status is on the state search - Practice location
- 762 Altos Oaks Dr, Los Altos, CA 94024
- Phone
- (650) 948-9123
- Enumerated
- Mar 20, 2018
- Record last updated
- Jul 21, 2023
- Entity
- Type 1 · individual
8 nearest cornea and external diseases specialist physician records → All 54 in California → Look up another NPI →
Also registered at 762 Altos Oaks Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stephanie P. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A165180Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average cornea and external diseases specialist physician in 2024
44 Medicare Part D claims for 25 beneficiaries, against an average of 1,263 among the 330 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of 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): 81.3 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).
Industry payments in 2024: $361.19
6 payments; by number, the most common kind was food and beverage; the largest payer was RxSight Inc. The 284 providers of this specialty with any payment received $3,109.37 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.
Stephanie P. Chen among 54 cornea and external diseases specialist physician records in California
Stephanie P. Chen, MD is one of 54 cornea and external diseases specialist physician records with a practice address in California. 96% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 74% of them.
- NPI issued2018 · 74% of these records are older, 19% newer
- In a Medicare fileYes · 96% of these records are
- In the CMS Doctors and Clinicians fileNo · 85% of these records are
- Record last updated2023 · 24% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207WX0120X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cornea and External Diseases Specialist Physician providers in California
There are 54 cornea and external diseases specialist physician records in California.
All 54 in California → Every provider in Los Altos → Cornea and External Diseases Specialist Physician nationwide →
The 8 cornea and external diseases specialist physician records with the nearest ZIP codes
- Joanne Choi, MDSan Francisco, CA 941021063041838
- Tyson Kim, M.D, PH.D.San Francisco, CA 941431568881555
- Ori Saban, MDSan Francisco, CA 941431407647431
- Charles Lin, MDStanford, CA 943051780818161
- Edward Manche, MDStanford, CA 943051992863443
- Bethlehem Mekonnen, MDStanford, CA 943051306208087
- David Myung, MDStanford, CA 943051942575568
- Jennifer Rose-Nussbaumer, MDStanford, CA 943051598912859
Common questions
What is Stephanie P. Chen, MD's NPI number?
Stephanie P. Chen, MD's National Provider Identifier (NPI) is 1629572136, issued on Mar 20, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Stephanie P. Chen, MD located?
The NPPES record lists a practice address at 762 Altos Oaks Dr, Los Altos, CA, 94024. Phone: (650) 948-9123. Providers update this record themselves, so call before visiting.
How can I verify Stephanie P. Chen, MD's license?
NPPES lists California license number A165180, 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 Stephanie P. Chen, MD prescribe under Medicare Part D?
In 2024, Stephanie P. Chen, MD had 44 Medicare Part D claims for 25 beneficiaries; the average among cornea and external diseases specialist physician prescribers was 1,263. Part D covers Medicare prescriptions only.
What is Stephanie P. Chen, MD's MIPS final score?
The 2023 MIPS final score is 81.3 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.