MS. MAI-CHI MARIE-FLORENCE TIEU RN, NP
NPI 1679974539
Nurse Practitioner in San Francisco, CA

Q: What is Mai-chi Tieu's NPI number?

The NPI number for Mai-chi Tieu is 1679974539. It was assigned to this individual provider in the NPPES registry on September 10, 2014.

Q: What is Mai-chi Tieu's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Mai-chi Tieu was last updated on April 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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 September 10, 2014PECOS Enrolled

1500 FRANKLIN ST, SAN FRANCISCO, CA 94109(415) 474-7310 Get Directions Write a Review

NPPES record last updated: April 17, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 17, 2026, Dec 17, 2019, Dec 9, 2015 (3 updates tracked since 2015).

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About Ms. Mai-chi Marie-florence Tieu Rn, Np NPPES

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

MS. MAI-CHI MARIE-FLORENCE TIEU RN, NP (NPI 1679974539) is an individual nurse practitioner in San Francisco, California, licensed in California (NP95002927) and active in the NPI registry since September 2014. She is enrolled in Medicare PECOS, maintains a secondary practice location in San Francisco, and is a graduate of Other (2015).

NPPES Registry Identity

NPI1679974539

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameMS. MAI-CHI MARIE-FLORENCE TIEUCredential: RN, NP

Location Address1500 FRANKLIN STSan Francisco, CA 94109-4523

Mailing Address2714 Fulton StSan Francisco, CA 94118-3923

Phone(415) 474-7310

Sole ProprietorNo

Medical School CMSOtherGraduated 2015

Enumeration DateSeptember 10, 2014

Last NPPES UpdateApril 17, 20263 updates tracked since enumeration

NPPES CertifiedApril 17, 2026

✔ NPI 1679974539 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in CA · NP95002927

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Also ListedRegistered NurseTaxonomy 163W00000X · License 809794 (CA)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X · License 809794 (CA)

1500 FRANKLIN ST, San Francisco, CA 94109

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Secondary Practice Location 1

Location 16221 Geary Blvd Fl 2San Francisco, CA 94121-1834 · Phone (415) 386-6600

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Mai-chi Marie-florence Tieu Rn, Np is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID9638443393

PECOS Enrollment IDI20170919001119

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 4

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.

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349

An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.

88 services25 patients

Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes 99350

An established patient home visit is a service where a healthcare professional visits a patient's home for a check-up or treatment. The visit typically lasts for about an hour. This service is especially beneficial for patients who may have difficulty traveling to a healthcare facility.

69 services25 patients

Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes 99348

An established patient home visit is a 25-minute appointment where a healthcare provider visits you at your home. This service is for patients who have previously been seen by the provider. It includes a check-up and discussion about your health concerns.

43 services16 patients

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.

17 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94109 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

$104.51 typical visit price

range $69.00 – $202.35

Typical copayment $26.12 (range $17.25 – $50.58)

Most-billed visit code 99203

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 20

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

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