Physician Profile
Yiann E. Chen, MD practices nephrology in Oakland, CA. Yiann is a 2002 graduate of Albert Einstein College of Medicine of Yeshiva University. Medicare claims data shows Yiann provided 70 services to 32 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Source: NPPES NPI Registry
275 W MACARTHUR BLVD
Oakland, CA 94611
Within Nephrology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
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70 services · 32 patients · 2 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
57 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
13 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Dr. Chen is a nephrology in Oakland, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Dr. Chen is listed at 275 W Macarthur Blvd, Oakland, CA 94611. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (510) 752-1000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
Dr. Chen's National Provider Identifier is 1891912689. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Dr. Chen attended Albert Einstein College of Medicine of Yeshiva University, graduating in 2002. This comes from the CMS National Downloadable File.
CMS public data
Dr. Chen has 24 years experience. Calculated from a graduation year of 2002, reported in the CMS National Downloadable File.
CMS public data
According to Medicare billing data, Dr. Chen the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Chen. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.