Stefanie Chu, MD
NPI 1821207796 · Internal Medicine Physician · Newark, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stefanie Chu, MD is a Internal Medicine Physician provider in Newark, CA (NPI 1821207796).
Provider details
- NPI number
- 1821207796
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A96462 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
35 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) |
|---|---|---|
| Screening Mammography77067 | 18 | $125 |
| Screening 3d Breast Mammography77063 | 17 | $34 |
Typical Medicare-allowed amounts for these services range $34–$125 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 171 | 60 |
| Losartan Potassium | 135 | 43 |
| Amlodipine Besylate | 130 | 44 |
| Pravastatin Sodium | 93 | 29 |
| Hydralazine Hcl | 56 | 18 |
| Diclofenac Sodium | 54 | 23 |
| Levothyroxine Sodium | 50 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-21
- Last updated
- 2016-09-26
Frequently asked questions
- What is Stefanie Chu's NPI number?
- Stefanie Chu's National Provider Identifier (NPI) is 1821207796, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stefanie Chu's specialty?
- Stefanie Chu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stefanie Chu located?
- Stefanie Chu's practice location on file with NPPES is 6066 Civic Terrace Ave, Newark, CA 94560-3746.
- What is Stefanie Chu's phone number?
- The practice phone number listed in the NPPES registry for Stefanie Chu is (510) 505-1600.
- Does Stefanie Chu accept Medicare?
- Stefanie Chu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stefanie Chu's NPI active?
- Yes — Stefanie Chu's NPI (1821207796) is active in the NPPES registry as of the last update on 2016-09-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.