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Edit this profileAt a glance
- 1100 Veterans Blvd, Redwood City, CA 94063
About Dr. Lien
Irvin C. Lien, MD is a healthcare provider located in Redwood City, CA. According to Medicare claims data, the services billed most often include initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes. This provider record is associated with NPI 1124654272.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (650) 299-2000
- Email not available
Practice Locations
1100 VETERANS BLVD
Redwood City, CA 94063
Procedures Most Often Billed to Medicare
11 services · 11 patients · 1 distinct code
| Procedure | Type | Code | Services |
|---|---|---|---|
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
11 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other providers at this location 4
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Common questions
Where is Dr. Lien located?
Dr. Lien is listed at 1100 Veterans Blvd, Redwood City, CA 94063. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Lien's phone number?
The number on file is (650) 299-2000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Lien's NPI number?
Dr. Lien's National Provider Identifier is 1124654272. 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
How long has Dr. Lien been practicing?
Dr. Lien has 6+ years experience. Registered with an NPI since 2020. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Dr. Lien do most often?
According to Medicare billing data, Dr. Lien 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
Has Dr. Lien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Lien. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.