Irvin Chi-Yang Lien, MD
Hospitalist Physician · Redwood City, CA
Irvin Chi-Yang Lien, MD is a hospitalist physician with a practice address in Redwood City, California, and NPI 1124654272, issued on Mar 20, 2020. Check the license (California A180133, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Irvin Chi-Yang Lien
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A180133 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Veterans Blvd, Redwood City, CA 94063
- Phone
- (650) 299-2000
- Enumerated
- Mar 20, 2020
- Record last updated
- Jul 2, 2023
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 1100 Veterans Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Deepti Baheti, M.B.B.SInternal Medicine Physician1720429319
- Dynah BartePharmacist1902441892
- Krista Bartlett, PA-CPhysician Assistant1578828117
- Liam Bosch, MDAdult Reconstructive Orthopaedic Surgery Physician1750814554
- Wesley Briones, PT, DPTPhysical Therapist1336624733
Verify Irvin Chi-Yang Lien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A180133Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% fewer Medicare Part D claims than the average hospitalist physician in 2024
513 Medicare Part D claims for 175 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
Most prescribed
- Furosemide49 claims
- Atorvastatin Calcium36 claims
- Cefpodoxime Proxetil35 claims
- Prednisone21 claims
- Metoprolol Tartrate19 claims
- Doxycycline Monohydrate17 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.
Irvin Chi-Yang Lien among 3,099 hospitalist physician records in California
Irvin Chi-Yang Lien, MD is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 85% of them.
- NPI issued2020 · 85% of these records are older, 10% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileNo · 81% of these records are
- Record last updated2023 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Redwood City → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Lakshmi Bhandari, MDRedwood City, CA 940631710059563
- Stella Clavecilla, DORedwood City, CA 940631578641056
- Dorina Gheorghevici, MDRedwood City, CA 940631942388582
- Curtis Huynh, MDRedwood City, CA 940631477631018
- Poonam Kapadia, MDRedwood City, CA 940631770661365
- Lorin Kreitzer, DORedwood City, CA 940631851479497
- Ernest Lau, MDRedwood City, CA 940631255419842
- Jasmeen Pombra, MDRedwood City, CA 940631417035072
Common questions
What is Irvin Chi-Yang Lien, MD's NPI number?
Irvin Chi-Yang Lien, MD's National Provider Identifier (NPI) is 1124654272, issued on Mar 20, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Irvin Chi-Yang Lien, MD located?
The NPPES record lists a practice address at 1100 Veterans Blvd, Redwood City, CA, 94063. Phone: (650) 299-2000. Providers update this record themselves, so call before visiting.
How can I verify Irvin Chi-Yang Lien, MD's license?
NPPES lists California license number A180133, 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 Irvin Chi-Yang Lien, MD prescribe under Medicare Part D?
In 2024, Irvin Chi-Yang Lien, MD had 513 Medicare Part D claims for 175 beneficiaries; the average among hospitalist physician prescribers was 521. 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.