Shirley Chan, NPC
NPI 1831387240 · Nurse Practitioner · Union City, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Shirley Chan, NPC is a Nurse Practitioner provider in Union City, CA (NPI 1831387240).
Provider details
- NPI number
- 1831387240
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NPC
- Sex
- Female
- Sole proprietor
- No
- License
- NP16306 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
334 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 157 | $93 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 69 | $64 |
| Administration of Influenza Virus VaccineG0008 | 37 | $6 |
| Admn Sarscov2 Vacc 1 Dose90480 | 26 | $25 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 25 | $95 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 20 | $133 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 198 | 73 |
| Losartan Potassium | 117 | 48 |
| Amlodipine Besylate | 87 | 33 |
| Metformin Hcl | 72 | 21 |
| Metoprolol Succinate | 46 | 21 |
| Levothyroxine Sodium | 45 | 15 |
| Empagliflozin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-10-10
- Last updated
- 2007-10-10
Frequently asked questions
- What is Shirley Chan's NPI number?
- Shirley Chan's National Provider Identifier (NPI) is 1831387240, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Shirley Chan's specialty?
- Shirley Chan is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Shirley Chan located?
- Shirley Chan's practice location on file with NPPES is 33255 Ninth St, Union City, CA 94587.
- What is Shirley Chan's phone number?
- The practice phone number listed in the NPPES registry for Shirley Chan is (510) 471-5880.
- Does Shirley Chan accept Medicare?
- Shirley Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Shirley Chan's NPI active?
- Yes — Shirley Chan's NPI (1831387240) is active in the NPPES registry as of the last update on 2007-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.