Siyu Deng
NPI 1235897414 · Family Medicine Physician · Upland, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Siyu Deng is a Family Medicine Physician provider in Upland, CA (NPI 1235897414).
Provider details
- NPI number
- 1235897414
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- Yes
- License
- 95019294 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
4 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 78 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 153 | 33 |
| Donepezil Hcl | 147 | 27 |
| Levothyroxine Sodium | 145 | 23 |
| Quetiapine Fumarate | 112 | 19 |
| Risperidone | 107 | 13 |
| Sertraline Hcl | 94 | 15 |
| Losartan Potassium | 92 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-12-04
- Last updated
- 2021-12-04
- Certified
- 2021-12-04
Frequently asked questions
- What is Siyu Deng's NPI number?
- Siyu Deng's National Provider Identifier (NPI) is 1235897414, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Siyu Deng's specialty?
- Siyu Deng is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Siyu Deng located?
- Siyu Deng's practice location on file with NPPES is 1004 W Foothill Blvd Ste 200, Upland, CA 91786-3791.
- What is Siyu Deng's phone number?
- The practice phone number listed in the NPPES registry for Siyu Deng is (909) 985-1908.
- Does Siyu Deng accept Medicare?
- Siyu Deng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Siyu Deng's NPI active?
- Yes — Siyu Deng's NPI (1235897414) is active in the NPPES registry as of the last update on 2021-12-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.