Tiffany Ly, M.D.
NPI 1235428038 · Internal Medicine Physician · Menlo Park, CA
Tiffany Ly, M.D. is a Internal Medicine Physician provider in Menlo Park, CA (NPI 1235428038).
Provider details
- NPI number
- 1235428038
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A123352 (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
15 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
1,394 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 426 | $19 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 403 | $153 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 162 | $213 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 135 | $153 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 100 | $109 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 49 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 179 | 53 |
| Levothyroxine Sodium | 142 | 29 |
| Rosuvastatin Calcium | 128 | 40 |
| Amlodipine Besylate | 123 | 32 |
| Losartan Potassium | 79 | 18 |
| Omeprazole | 73 | 25 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-04-01
- Last updated
- 2025-04-30
- Certified
- 2025-04-30
Frequently asked questions
- What is Tiffany Ly's NPI number?
- Tiffany Ly's National Provider Identifier (NPI) is 1235428038, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tiffany Ly's specialty?
- Tiffany Ly is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tiffany Ly located?
- Tiffany Ly's practice location on file with NPPES is 3500 Alameda De Las Pulgas Ste 200, Menlo Park, CA 94025-6569.
- What is Tiffany Ly's phone number?
- The practice phone number listed in the NPPES registry for Tiffany Ly is (650) 815-9577.
- Is Tiffany Ly's NPI active?
- Yes — Tiffany Ly's NPI (1235428038) is active in the NPPES registry as of the last update on 2025-04-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.