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- 33255 Ninth St, Union City, CA 94587
About Shirley Chan
Shirley Chan, NPC is a nurse practitioner based in Union City, CA. According to Medicare claims data, Shirley cared for 331 Medicare patients across 393 services. 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, telephone medical discussion with physician, 11-20 minutes, and administration of influenza virus vaccine. The provider's National Provider Identifier (NPI) is 1831387240.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
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
- (510) 471-5880
- Email not available
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Practice Locations
33255 NINTH ST
Union City, CA 94587
Procedures Most Often Billed to Medicare
393 services · 331 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
27 | More often than most peers in Nurse Practitioner |
| Admn sarscov2 vacc 1 dose | Treatment | 90480 |
26 | More often than most peers in Nurse Practitioner |
| Sarscv2 vac 30mcg trs-suc im | Treatment | 91320 |
20 | As often as other peers in Nurse Practitioner |
| Influenza vaccine, trivalent, split virus, preservative-free, 0.5 ml dosage | Treatment | 90656 |
12 | Less often than most peers in Nurse Practitioner |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
157 | More often than most peers in Nurse Practitioner |
| Telephone medical discussion with physician, 11-20 minutes | Office visit | 99442 |
69 | More than most peers in Nurse Practitioner |
| Administration of influenza virus vaccine | Billing code | G0008 |
37 | More often than most peers in Nurse Practitioner |
| Telephone medical discussion with physician, 21-30 minutes | Office visit | 99443 |
25 | As often as other peers in Nurse Practitioner |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
20 | Less often than most peers in Nurse Practitioner |
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 nurse practitioners at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 1
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other nurse practitioners in Union City 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2005 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Influenza vaccine split virus, preservative free 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Shirley Chan specialize in?
Shirley Chan is a nurse practitioner in Union City, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Shirley Chan located?
Shirley Chan is listed at 33255 Ninth St, Union City, CA 94587. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Shirley Chan's phone number?
The number on file is (510) 471-5880. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Shirley Chan's NPI number?
Shirley Chan's National Provider Identifier is 1831387240. 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
Where did Shirley Chan train?
Shirley Chan attended Other, graduating in 2005. This comes from the CMS National Downloadable File.
CMS public data
How long has Shirley Chan been practicing?
Shirley Chan has 21 years experience. Calculated from a graduation year of 2005, reported in the CMS National Downloadable File.
CMS public data
What does Shirley Chan do most often?
According to Medicare billing data, Shirley Chan provides treatments such as influenza vaccine split virus, preservative free and admn sarscov2 vacc 1 dose, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Shirley Chan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Shirley Chan. If this is you, claiming it is free.
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