Fred Lai, M.D.
NPI 1649476128 · Internal Medicine Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Fred Lai, M.D. is a Internal Medicine Physician provider in Fontana, CA (NPI 1649476128).
Provider details
- NPI number
- 1649476128
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A105247 (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
18 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 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ciprofloxacin Hcl | 19 | 19 |
| Potassium Chloride | 18 | 14 |
| Losartan Potassium | 17 | — |
| Amlodipine Besylate | 16 | — |
| Atorvastatin Calcium | 16 | — |
| Clopidogrel Bisulfatebrand: Clopidogrel | 14 | — |
| Furosemide | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-22
- Last updated
- 2021-12-01
Frequently asked questions
- What is Fred Lai's NPI number?
- Fred Lai's National Provider Identifier (NPI) is 1649476128, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Fred Lai's specialty?
- Fred Lai is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Fred Lai located?
- Fred Lai's practice location on file with NPPES is 9961 Sierra Ave, Fontana, CA 92335-6720.
- What is Fred Lai's phone number?
- The practice phone number listed in the NPPES registry for Fred Lai is (909) 706-1562.
- Does Fred Lai accept Medicare?
- Fred Lai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Fred Lai's NPI active?
- Yes — Fred Lai's NPI (1649476128) is active in the NPPES registry as of the last update on 2021-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.