Mychi Nguyen, M.D.
NPI 1366615163 · Internal Medicine Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mychi Nguyen, M.D. is a Internal Medicine Physician provider in Oakland, CA (NPI 1366615163).
Provider details
- NPI number
- 1366615163
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A103314 (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
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
12 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) |
|---|---|---|
| Electrocardiogram (ecg) 1 to 3 Leads With Review By Physician93040 | 12 | $16 |
Typical Medicare-allowed amounts for these services range $16–$16 (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 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 398 | 123 |
| Losartan Potassium | 294 | 82 |
| Amlodipine Besylate | 191 | 56 |
| Metformin Hcl | 163 | 49 |
| Alendronate Sodium | 127 | 37 |
| Gabapentin | 96 | 29 |
| Empagliflozinbrand: Jardiance |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-04-12
- Last updated
- 2016-07-21
Frequently asked questions
- What is Mychi Nguyen's NPI number?
- Mychi Nguyen's National Provider Identifier (NPI) is 1366615163, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mychi Nguyen's specialty?
- Mychi Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mychi Nguyen located?
- Mychi Nguyen's practice location on file with NPPES is 250 E 18th St, Oakland, CA 94606-1729.
- What is Mychi Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Mychi Nguyen is (510) 735-3888.
- Does Mychi Nguyen accept Medicare?
- Mychi Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mychi Nguyen's NPI active?
- Yes — Mychi Nguyen's NPI (1366615163) is active in the NPPES registry as of the last update on 2016-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.