LILY MING-SHA HORNG MD
NPI 1902065956
Internal Medicine in Stanford, CA

Q: What is Lily Horng's NPI number?

The NPI number for Lily Horng is 1902065956. It was assigned to this individual provider in the NPPES registry on June 5, 2008.

Q: What is Lily Horng's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Lily Horng was last updated on January 5, 2022. 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.

Active since June 05, 2008PECOS EnrolledAccepts Medicare Assignment

300 PASTEUR DR, GRANT BUILDING, S-101, STANFORD, CA 94305(203) 675-2881(650) 723-3474 Get Directions Write a Review

NPPES record last updated: January 5, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Lily Ming-sha Horng Md NPPES

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

LILY MING-SHA HORNG MD (NPI 1902065956) is an individual internal medicine provider in Stanford, California, licensed in California (120501) and active in the NPI registry since June 2008. She is enrolled in Medicare PECOS and is a graduate of Yale University School Of Medicine (2008).

NPPES Registry Identity

NPI1902065956

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameLILY MING-SHA HORNGCredential: MD

Location Address300 PASTEUR DR, GRANT BUILDING, S-101Stanford, CA 94305-2200

Mailing Address850 Marina Bay PkwyRichmond, CA 94804-6403 · (510) 619-6225

Phone(203) 675-2881

Fax(650) 723-3474

Sole ProprietorYes

Medical School CMSYale University School Of MedicineGraduated 2008

Enumeration DateJune 5, 2008

Last NPPES UpdateJanuary 5, 2022

NPPES CertifiedJanuary 5, 2022

✔ NPI 1902065956 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

Licenses✔ Licensed in CA · 120501✔ Licensed in AZ · 45181

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.

300 PASTEUR DR, Stanford, CA 94305

Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Lily Ming-sha Horng Md 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 ID5395917520

PECOS Enrollment IDI20161205001761

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.

Medicare Billing Reassignments

Medicare enrollment records show Lily Horng reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Sutter Bay Medical Foundation

0.9 mi

Multi-Specialty

795 EL CAMINO REAL
Palo Alto, CA 94301

Reassigned Medicare billing, California enrollment
4,479 clinicians in this Medicare group

NPI 1013950807 (650) 321-4121

County Of San Mateo

9.5 mi

Public Health or Welfare

222 W 39TH AVE
San Mateo, CA 94403

Reassigned Medicare billing, California enrollment
46 clinicians in this Medicare group

NPI 1306907928 (650) 573-2222

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

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 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

64 services41 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

18 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94305 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

$156.67 typical visit price

range $70.37 – $206.04

Typical copayment $39.16 (range $17.59 – $51.51)

Most-billed visit code 99204

Established Patient

$121.77 typical visit price

range $23.96 – $169.60

Typical copayment $30.44 (range $5.99 – $42.40)

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 20

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

PRISTA CHARUWORN MD

Internal Medicine (Gastroenterology)

300 PASTEUR DR, ALWAY BUILD M211, MC 5187
STANFORD, CA 94305

Santa Clara County (650) 723-6661

ANDREW CHARLES PICEL M.D

Radiology (Vascular & Interventional Radiology)

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

MATTHEW A WRIGHT M.D. PH.D.

Psychiatry & Neurology (Psychiatry)

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

DR. QUAZI ZUBAIR AL-TARIQ M.D.

Radiology (Diagnostic Radiology)

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

ANGIE DEE MURKINS NP

Nurse Practitioner

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

DR. JAMSHID GHAJAR MD PHD

Neurological Surgery

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

SARA BAKHTARY M.D.

Pathology (Anatomic Pathology & Clinical Pathology)

300 PASTEUR DR, LANE 235
STANFORD, CA 94305

Santa Clara County (650) 723-5252

YU KUANG LAI MD

Internal Medicine (Critical Care Medicine)

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

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 Lily Horng's NPI number?

The NPI number for Lily Horng is 1902065956. It was assigned to this individual provider in the NPPES registry on June 5, 2008.

Where is Lily Horng located?

Lily Horng practices at 300 Pasteur Dr Grant Building, S-101, Stanford, CA 94305. The listed phone number is (203) 675-2881.

What is Lily Horng's specialty?

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

Is Lily Horng enrolled in Medicare?

Yes. Lily Horng 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.

Which organizations bill Medicare for Lily Horng's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lily Horng reassigns Medicare benefits to 2 organizations: Sutter Bay Medical Foundation (Palo Alto, CA) and County Of San Mateo (San Mateo, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lily Horng's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Lily Horng was last updated on January 5, 2022. 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.