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DR. TIFFANY LY M.D.
NPI 1235428038
Internal Medicine in Menlo Park, CA

Active since April 01, 2011Opted out of Medicare · through Aug 25, 2027
3500 ALAMEDA DE LAS PULGAS STE 200, MENLO PARK, CA 94025(650) 815-9577(650) 289-0166 Get Directions Write a Review

NPPES record last updated: April 30, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Tiffany Ly M.d. NPPES

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

DR. TIFFANY LY M.D. (NPI 1235428038) is an individual internal medicine provider in Menlo Park, California, licensed in California (A123352) and active in the NPI registry since April 2011. She has opted out of Medicare through August 25, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1235428038
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. TIFFANY LYCredential: M.D.
Location Address3500 ALAMEDA DE LAS PULGAS STE 200Menlo Park, CA 94025-6569
Mailing Address3500 Alameda De Las Pulgas Ste 200Menlo Park, CA 94025-6569 · (650) 815-9577 · Fax (650) 289-0166
Phone(650) 815-9577
Fax(650) 289-0166
Sole ProprietorYes
Enumeration DateApril 1, 2011
Last NPPES UpdateApril 30, 2025
NPPES CertifiedApril 30, 2025
✔ NPI 1235428038 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 · A123352
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.

3500 ALAMEDA DE LAS PULGAS STE 200, Menlo Park, CA 94025
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Tiffany Ly M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from August 25, 2025 through August 25, 2027.

Opt-Out Effective DateAugust 25, 2025
Opt-Out In Effect ThroughAugust 25, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Areas of Expertise CMS Part B claims 11

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
403 services213 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
162 services102 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
135 services135 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
100 services86 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
48 services48 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
47 services47 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94025 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

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

DR. LAURA MARIE WEBB MD
Pediatrics
3500 ALAMEDA DE LAS PULGAS STE 200
MENLO PARK, CA 94025
San Mateo County (650) 815-9577

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 Tiffany Ly's NPI number?

The NPI number for Tiffany Ly is 1235428038. It was assigned to this individual provider in the NPPES registry on April 1, 2011.

Where is Tiffany Ly located?

Tiffany Ly practices at 3500 Alameda De Las Pulgas Ste 200, Menlo Park, CA 94025. The listed phone number is (650) 815-9577.

What is Tiffany Ly's specialty?

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

Is Tiffany Ly enrolled in Medicare?

No. Tiffany Ly has opted out of Medicare through August 25, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Tiffany Ly was last updated on April 30, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.