Provider Profile
Lillian Y. Chang
Unclaimed ProfileAbout Lillian Chang
Lillian Y. Chang is a physician assistant based in Mountain View, CA. Lillian is also listed as specializing in student in an organized health care education program. Medicare claims data shows Lillian provided 55 services to 54 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more and new patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
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) 404-8370
- Email not available
Practice Locations
701 E EL CAMINO REAL
Mountain View, CA 94040
Procedures Most Often Billed to Medicare
55 services · 54 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
42 | As often as other peers in Physician Assistant |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
13 | Less often than most peers in Physician Assistant |
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 physician assistants at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 22 related providers in 3 groups
Other physician assistants in Mountain View 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2021 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Lillian Y. Chang's specialty?
Lillian Y. Chang is a physician assistant in Mountain View, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Lillian Y. Chang?
Lillian Y. Chang is listed at 701 E El Camino Real, Mountain View, CA 94040. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Lillian Y. Chang?
The number on file is (650) 404-8370. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Lillian Y. Chang?
Lillian Y. Chang's National Provider Identifier is 1922630433. 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
What is Lillian Y. Chang's education?
Lillian Y. Chang attended Other, graduating in 2021. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Lillian Y. Chang have?
Lillian Y. Chang has 5 years experience. Calculated from a graduation year of 2021, reported in the CMS National Downloadable File.
CMS public data
What is Lillian Y. Chang known for?
According to Medicare billing data, Lillian Y. Chang 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
Is Lillian Y. Chang's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Lillian Y. Chang. 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.