Doctor profile · Federal record

Dr. Ada Lien, PA-C, MPH

Medical Physician Assistant (CMS: Physician Assistant) · San Leandro, CA

  • NPI 1174053573
  • Accepts Medicare
  • MIPS 83.9 / 100 · 2023
  • 9 yrs in practice
  • Female
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
13855 E 14Th St
San Leandro, CA 945782611
(510) 667-4545

Credentials & registration

NPPES · NUCC
NPI registered
June 2017 — 9 yrs on file
Year of graduation
2017 — 9 yrs since
Specialty taxonomy
363AM0700X — NUCC code
State license (1)
California #54561

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1174053573. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
92
Distinct HCPCS
3
Medicare allowed
$10,479
HCPCS Description Services Patients Avg allowed
99284 Emergency department visit with moderate level of medical decision making 44 42 $112
99285 Emergency department visit with high level of medical decision making 25 25 $162
99283 Emergency department visit with low level of medical decision making 23 23 $66

In context: peer comparison

Among 2 peers in San Leandro Medical Physician Assistant, average services per provider: 32. This provider delivers 2.9× the peer median.

Frequently asked questions

Auto-generated from federal data
What is Dr. Ada Lien's medical specialty?
Dr. Ada Lien practices Medical Physician Assistant in San Leandro, CA.
Where does Dr. Ada Lien practice?
Dr. Ada Lien practices at 13855 E 14Th St, San Leandro, CA 945782611. Office phone: 5106674545.
What is Dr. Ada Lien's NPI?
Dr. Ada Lien's National Provider Identifier (NPI) is 1174053573, issued by NPPES.
Does Dr. Ada Lien accept Medicare assignment?
Yes. Dr. Ada Lien accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ada Lien commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with moderate level of medical decision making (HCPCS 99284); Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with low level of medical decision making (HCPCS 99283). Source: CMS Medicare Physician & Other Practitioners file.