1. Home
  2. Directory
  3. California
  4. Walnut Creek
  5. Internal Medicine
  6. NPI Profile

DR. LILLIAN TSENG M.D.
NPI 1619016169
Internal Medicine in Walnut Creek, CA

Active since February 05, 2007PECOS EnrolledAccepts Medicare Assignment
1515 NEWELL AVE, WALNUT CREEK, CA 94596(925) 295-4000 Get Directions Write a Review

NPPES record last updated: December 13, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Lillian Tseng M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LILLIAN TSENG M.D. (NPI 1619016169) is an individual internal medicine provider in Walnut Creek, California, licensed in California (A92629) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Vanderbilt University School Of Medicine (2004).

NPPES Registry Identity

NPI1619016169
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. LILLIAN TSENGCredential: M.D.
Location Address1515 NEWELL AVEWalnut Creek, CA 94596-5120
Mailing Address1515 Newell AveWalnut Creek, CA 94596-5120
Phone(925) 295-4000
Sole ProprietorNo
Medical School CMSVanderbilt University School Of MedicineGraduated 2004
Enumeration DateFebruary 5, 2007
Last NPPES UpdateDecember 13, 2021
✔ NPI 1619016169 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A92629
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1515 NEWELL AVE, Walnut Creek, CA 94596
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Lillian Tseng M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3476693342
PECOS Enrollment IDI20091228000442
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
24 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94596 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. HANNELORE HARWOOD NP
Nurse Practitioner (Women's Health)
1515 NEWELL AVE
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-5447
NATALIE Y CHANG D.O.
Internal Medicine
1515 NEWELL AVE
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4070
DR. SERENA LIN
Obstetrics & Gynecology
1515 NEWELL AVE, DEPARTMENT OF WOMEN'S HEALTH
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4040
DR. ANDREW LIN M.D.
Internal Medicine (Nephrology)
1515 NEWELL AVE
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-6333
GERALDINE SHIRZAI MD
Obstetrics & Gynecology (Gynecology)
1515 NEWELL AVE
WALNUT CREEK, CA 94596
Contra Costa County (925) 737-3798
BETTY SHEAU-JING TSAI DO MD
Otolaryngology
1515 NEWELL AVE
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4000
DR. WHITNEY M DEWALT M.D.
Obstetrics & Gynecology
1515 NEWELL AVE
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4000
JONATHAN NGUYEN M.D.
Internal Medicine
1515 NEWELL AVE
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Lillian Tseng's NPI number?

The NPI number for Lillian Tseng is 1619016169. It was assigned to this individual provider in the NPPES registry on February 5, 2007.

Where is Lillian Tseng located?

Lillian Tseng practices at 1515 Newell Ave, Walnut Creek, CA 94596. The listed phone number is (925) 295-4000.

What is Lillian Tseng's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Lillian Tseng enrolled in Medicare?

Yes. Lillian Tseng is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Lillian Tseng was last updated on December 13, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.