Warren Lok, M.D.
NPI 1962658344 · Student in an Organized Health Care Education/Training Program · New Haven, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Warren Lok, M.D. is a Student in an Organized Health Care Education/Training Program provider in New Haven, CT (NPI 1962658344).
Provider details
- NPI number
- 1962658344
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
83% 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 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Abiraterone Acetate | 266 | 44 |
| Letrozole | 169 | 54 |
| Prednisone | 168 | 58 |
| Lenalidomide | 110 | 16 |
| Dexamethasone | 102 | 40 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 86 | 20 |
| Exemestane | 66 | 22 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-08-17
- Last updated
- 2021-12-10
- Certified
- 2021-12-07
Frequently asked questions
- What is Warren Lok's NPI number?
- Warren Lok's National Provider Identifier (NPI) is 1962658344, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Warren Lok's specialty?
- Warren Lok is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Warren Lok located?
- Warren Lok's practice location on file with NPPES is 20 York St, New Haven, CT 06510-3220.
- What is Warren Lok's phone number?
- The practice phone number listed in the NPPES registry for Warren Lok is (203) 688-2259.
- Does Warren Lok accept Medicare?
- Warren Lok is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Warren Lok's NPI active?
- Yes — Warren Lok's NPI (1962658344) is active in the NPPES registry as of the last update on 2021-12-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.