John Lin, M.D.
NPI 1972558138 · Critical Care Medicine (Internal Medicine) Physician · Valencia, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Lin, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in Valencia, CA (NPI 1972558138).
Provider details
- NPI number
- 1972558138
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A82618 (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
20 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
- 2006-05-24
- Last updated
- 2011-01-04
Frequently asked questions
- What is John Lin's NPI number?
- John Lin's National Provider Identifier (NPI) is 1972558138, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Lin's specialty?
- John Lin is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is John Lin located?
- John Lin's practice location on file with NPPES is 27055 Island Rd, Valencia, CA 91355-1607.
- What is John Lin's phone number?
- The practice phone number listed in the NPPES registry for John Lin is (310) 623-0020.
- Does John Lin accept Medicare?
- John Lin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Lin's NPI active?
- Yes — John Lin's NPI (1972558138) is active in the NPPES registry as of the last update on 2011-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.