Michael Kwok, M.D.
NPI 1881717197 · Internal Medicine Physician · Diamond Bar, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Kwok, M.D. is a Internal Medicine Physician provider in Diamond Bar, CA (NPI 1881717197).
Provider details
- NPI number
- 1881717197
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A054075 (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
19 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 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 251 | 88 |
| Amlodipine Besylate | 157 | 58 |
| Lisinopril | 135 | 46 |
| Losartan Potassium | 119 | 38 |
| Rosuvastatin Calcium | 104 | 37 |
| Metformin Hcl | 103 | 38 |
| Glipizide | 83 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-10
- Last updated
- 2021-12-01
- Certified
- 2021-12-01
Frequently asked questions
- What is Michael Kwok's NPI number?
- Michael Kwok's National Provider Identifier (NPI) is 1881717197, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Kwok's specialty?
- Michael Kwok is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Kwok located?
- Michael Kwok's practice location on file with NPPES is 3220 S Brea Canyon Rd, Diamond Bar, CA 91765-3481.
- What is Michael Kwok's phone number?
- The practice phone number listed in the NPPES registry for Michael Kwok is (909) 594-1848.
- Does Michael Kwok accept Medicare?
- Michael Kwok is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Kwok's NPI active?
- Yes — Michael Kwok's NPI (1881717197) 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.