Kenneth Lien, MD
NPI 1396823092 · Allergy Physician · Castro Valley, CA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kenneth Lien, MD is a Allergy Physician provider in Castro Valley, CA (NPI 1396823092).
Provider details
- NPI number
- 1396823092
- Entity type
- Individual
- Primary specialty
- Allergy PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A72098 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
6,716 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Test for Allergy Using Allergenic Extract95004 | 4,642 | $5 |
| Test for Allergy Using Skin Patch95044 | 1,540 | $7 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 272 | $109 |
| Test to Measure Expiratory Airflow and Volume94010 | 153 | $36 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 52 | $197 |
| Test to Measure Expiratory Airflow and Volume Changes Before and After Medication Administration94060 | 32 | $51 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone Propionate | 104 | 35 |
| Montelukast Sodium | 84 | 24 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 83 | 41 |
| Azelastine Hcl | 63 | 26 |
| Levocetirizine Dihydrochloride | 57 | 17 |
| Dupilumabbrand: Dupixent Syringe | 55 | — |
| Budesonide/Glycopyr/Formoterol |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,376 across 47 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2014-02-03
Frequently asked questions
- What is Kenneth Lien's NPI number?
- Kenneth Lien's National Provider Identifier (NPI) is 1396823092, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kenneth Lien's specialty?
- Kenneth Lien is listed in the NPPES registry with a primary specialty of Allergy Physician (Allopathic & Osteopathic Physicians).
- Where is Kenneth Lien located?
- Kenneth Lien's practice location on file with NPPES is 20400 Lake Chabot Rd, Castro Valley, CA 94546-5316.
- What is Kenneth Lien's phone number?
- The practice phone number listed in the NPPES registry for Kenneth Lien is (510) 537-0700.
- Does Kenneth Lien accept Medicare?
- Kenneth Lien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kenneth Lien's NPI active?
- Yes — Kenneth Lien's NPI (1396823092) is active in the NPPES registry as of the last update on 2014-02-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.