Doctor profile · Federal record
Dr. Kenneth Lien, MD
Allergy Physician (CMS: Allergy/Immunology) · Castro Valley, CA
- NPI 1396823092
- Accepts Medicare
- 28 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
20400 Lake Chabot RD, Ste. 304
Castro Valley, CA 945465316
(510) 537-0700
fax (510) 537-7795 - Mailing address
-
20400 Lake Chabot RD Ste 304, Ste. 304
Castro Valley, CA 945465316
Credentials & registration
- NPI registered
- November 2006 — 20 yrs on file
- Profile last updated
- February 3, 2014
- Year of graduation
- 1998 — 28 yrs since
- Specialty taxonomy
- 207KA0200X — NUCC code
- State license (1)
- California #A72098
- Medicaid
- CA #1396823092
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1396823092. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
6,301
Distinct HCPCS
7
Medicare allowed
$77,725
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
95004 |
Test for allergy using allergenic extract | 4,657 | 55 | $5 | |
95044 |
Test for allergy using skin patch | 1,121 | 17 | $7 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 267 | 130 | $98 | |
94010 |
Test to measure expiratory airflow and volume | 155 | 78 | $34 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 57 | 57 | $194 | |
94060 |
Test to measure expiratory airflow and volume changes before and after medication administration | 23 | 19 | $50 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 21 | 21 | $132 |
In context: peer comparison
Among 1 peers in Castro Valley Allergy Physician, average services per provider: 900. This provider delivers 7.0× the peer median.Open Payments
Industry payments received
All-time total
$1,376
Transactions
47
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| AstraZeneca Pharmaceuticals Lp | 22 | $630.71 | |
| Regeneron Healthcare Solutions, INC. | 5 | $178.71 | |
| Genzyme Corporation | 6 | $174.43 | |
| Greer Laboratories, INC. | 5 | $154.56 | |
| Genentech USA, INC. | 4 | $89.65 | |
| Sanofi-Aventis U.S. LLC | 1 | $72.00 | |
| Pfizer INC. | 2 | $38.77 | |
| Novartis Pharmaceuticals Corporation | 1 | $23.46 | |
| GlaxoSmithKline, LLC. | 1 | $13.48 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
697
Patients
198
Total drug cost
$353,483
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Montelukast Sodium | Generic | 112 | 28 | $2,023 |
| Fluticasone Propionate | Generic | 83 | 31 | $1,784 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 70 | 29 | $2,216 |
| Dupixent Syringe (Dupilumab) | Brand | 63 | 0 | $241,905 |
| Azelastine Hcl | Generic | 52 | 22 | $2,122 |
| Flovent Hfa (Fluticasone Propionate) | Brand | 44 | 15 | $19,205 |
| Symbicort (Budesonide/Formoterol Fumarate) | Brand | 40 | 14 | $18,557 |
| Levocetirizine Dihydrochloride | Generic | 38 | 15 | $1,280 |
| Ipratropium Bromide | Generic | 35 | 16 | $1,260 |
| Trelegy Ellipta (Fluticasone/Umeclidin/Vilanter) | Brand | 30 | 0 | $25,409 |
Frequently asked questions
What is Dr. Kenneth Lien's medical specialty?
Dr. Kenneth Lien practices Allergy Physician in Castro Valley, CA.
Where does Dr. Kenneth Lien practice?
Dr. Kenneth Lien practices at 20400 Lake Chabot RD, Castro Valley, CA 945465316. Office phone: 5105370700.
What is Dr. Kenneth Lien's NPI?
Dr. Kenneth Lien's National Provider Identifier (NPI) is 1396823092, issued by NPPES.
Does Dr. Kenneth Lien accept Medicare assignment?
Yes. Dr. Kenneth Lien accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Kenneth Lien commonly perform?
Top Medicare-reported procedures in 2023: Test for allergy using allergenic extract (HCPCS 95004); Test for allergy using skin patch (HCPCS 95044); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.