Linda Chak, M.D.
NPI 1275734956 · Radiation Oncology Physician · San Marino, CA
Linda Chak, M.D. is a Radiation Oncology Physician provider in San Marino, CA (NPI 1275734956).
Provider details
- NPI number
- 1275734956
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- G35828 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-30
- Last updated
- 2007-07-08
Frequently asked questions
- What is Linda Chak's NPI number?
- Linda Chak's National Provider Identifier (NPI) is 1275734956, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Linda Chak's specialty?
- Linda Chak is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Linda Chak located?
- Linda Chak's practice location on file with NPPES is 1281 Mill Ln, San Marino, CA 91108-1020.
- What is Linda Chak's phone number?
- The practice phone number listed in the NPPES registry for Linda Chak is (626) 716-2076.
- Is Linda Chak's NPI active?
- Yes — Linda Chak's NPI (1275734956) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.