Katherine Lin, D.O.
NPI 1427208651 · Internal Medicine Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Lin, D.O. is a Internal Medicine Physician provider in Fontana, CA (NPI 1427208651).
Provider details
- NPI number
- 1427208651
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 20A10523 (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
17 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 · 93 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 345 | 140 |
| Amlodipine Besylate | 235 | 86 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 202 | 31 |
| Omeprazole | 173 | 74 |
| Meloxicam | 172 | 65 |
| Metformin Hclbrand: Metformin Hcl Er | 168 | 64 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-09-24
- Last updated
- 2021-10-18
- Certified
- 2021-10-18
Frequently asked questions
- What is Katherine Lin's NPI number?
- Katherine Lin's National Provider Identifier (NPI) is 1427208651, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Lin's specialty?
- Katherine Lin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Lin located?
- Katherine Lin's practice location on file with NPPES is 9961 Sierra Ave, Fontana, CA 92335-6720.
- What is Katherine Lin's phone number?
- The practice phone number listed in the NPPES registry for Katherine Lin is (909) 839-1912.
- Does Katherine Lin accept Medicare?
- Katherine Lin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Lin's NPI active?
- Yes — Katherine Lin's NPI (1427208651) is active in the NPPES registry as of the last update on 2021-10-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.