Constance Lo, MD
NPI 1033175997 · Internal Medicine Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Constance Lo, MD is a Internal Medicine Physician provider in San Jose, CA (NPI 1033175997).
Provider details
- NPI number
- 1033175997
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A72854 (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
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 117 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 510 | 157 |
| Amlodipine Besylate | 345 | 98 |
| Levothyroxine Sodium | 222 | 57 |
| Metformin Hcl | 220 | 64 |
| Omeprazole | 183 | 51 |
| Gabapentin | 150 | 46 |
| Alendronate Sodium | 149 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-20
- Last updated
- 2008-04-29
Frequently asked questions
- What is Constance Lo's NPI number?
- Constance Lo's National Provider Identifier (NPI) is 1033175997, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Constance Lo's specialty?
- Constance Lo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Constance Lo located?
- Constance Lo's practice location on file with NPPES is 2400 Moorpark Ave, San Jose, CA 95128-2631.
- What is Constance Lo's phone number?
- The practice phone number listed in the NPPES registry for Constance Lo is (408) 885-5000.
- Does Constance Lo accept Medicare?
- Constance Lo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Constance Lo's NPI active?
- Yes — Constance Lo's NPI (1033175997) is active in the NPPES registry as of the last update on 2008-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.