Stacy Ly, M.D.
NPI 1649458795 · Internal Medicine Physician · Concord, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stacy Ly, M.D. is a Internal Medicine Physician provider in Concord, CA (NPI 1649458795).
Provider details
- NPI number
- 1649458795
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A102438 (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
662 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 314 | $88 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 117 | $132 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 69 | $130 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 40 | $193 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 28 | $149 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 21 | 12 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 18 | — |
| Pantoprazole Sodium | 17 | — |
| Rosuvastatin Calcium | 15 | — |
| Furosemide | 14 | 14 |
| Losartan Potassium | 12 | — |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-01-31
- Last updated
- 2012-06-21
Frequently asked questions
- What is Stacy Ly's NPI number?
- Stacy Ly's National Provider Identifier (NPI) is 1649458795, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stacy Ly's specialty?
- Stacy Ly is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stacy Ly located?
- Stacy Ly's practice location on file with NPPES is 2700 Grant St, Concord, CA 94520-2266.
- What is Stacy Ly's phone number?
- The practice phone number listed in the NPPES registry for Stacy Ly is (925) 674-2609.
- Does Stacy Ly accept Medicare?
- Stacy Ly is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stacy Ly's NPI active?
- Yes — Stacy Ly's NPI (1649458795) is active in the NPPES registry as of the last update on 2012-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.