Marissa Wen, MD
NPI 1467999169 · Internal Medicine Physician · Lathrop, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Wen, MD is a Internal Medicine Physician provider in Lathrop, CA (NPI 1467999169).
Provider details
- NPI number
- 1467999169
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A161459 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 78 | 54 |
| Famotidine | 54 | 47 |
| Furosemide | 50 | 35 |
| Doxycycline Monohydrate | 34 | 34 |
| Cefpodoxime Proxetil | 32 | 32 |
| Metoprolol Succinate | 31 | 21 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 29 | 25 |
Practice location
Mailing address
Additional practice locations (1)
- 4601 Dale RdModesto, CA 95356-9718Phone: (209) 735-5000
Registry dates
- Enumerated
- 2017-01-20
- Last updated
- 2022-01-21
- Certified
- 2022-01-21
Frequently asked questions
- What is Marissa Wen's NPI number?
- Marissa Wen's National Provider Identifier (NPI) is 1467999169, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Wen's specialty?
- Marissa Wen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marissa Wen located?
- Marissa Wen's practice location on file with NPPES is 1507 Garden Farms Ave, Lathrop, CA 95330-8292.
- What is Marissa Wen's phone number?
- The practice phone number listed in the NPPES registry for Marissa Wen is (209) 479-8000.
- Does Marissa Wen accept Medicare?
- Marissa Wen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Wen's NPI active?
- Yes — Marissa Wen's NPI (1467999169) is active in the NPPES registry as of the last update on 2022-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.