Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARISA TIENYUN SMITH MD
NPI 1447756259
Emergency Medicine in Redwood City, CA

Q: What is Marisa Smith's NPI number?

The NPI number for Marisa Smith is 1447756259. It was assigned to this individual provider in the NPPES registry on April 2, 2018. The provider is also known as Marisa Smith MD, Mph.

Q: What is Marisa Smith's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Marisa Smith was last updated on June 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 51 days 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 April 02, 2018PECOS EnrolledAccepts Medicare Assignment

76.5/100

CMS Quality Rating

1100 VETERANS BLVD, REDWOOD CITY, CA 94063(650) 299-2000 Get Directions Write a Review

NPPES record last updated: June 26, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 9, 2025, Jul 13, 2023 (2 updates tracked since 2023).

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About Marisa Tienyun Smith Md NPPES

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

MARISA TIENYUN SMITH MD (NPI 1447756259) is an individual emergency medicine provider in Redwood City, California, licensed in California (A185755) and active in the NPI registry since April 2018. She is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Wright State University Boonshoft School Of Medicine (2018).

NPPES Registry Identity

NPI1447756259

Entity TypeIndividualFemale

Primary Taxonomy207P00000X

Provider Legal NameMARISA TIENYUN SMITHCredential: MD

Location Address1100 VETERANS BLVDRedwood City, CA 94063-2037

Mailing Address1100 Veterans BlvdRedwood City, CA 94063-2037 · (650) 299-2000

Phone(650) 299-2000

Sole ProprietorNo

Medical School CMSWright State University Boonshoft School Of MedicineGraduated 2018

Enumeration DateApril 2, 2018

Last NPPES UpdateJune 26, 20262 updates tracked since enumeration

NPPES CertifiedJune 26, 2026

✔ NPI 1447756259 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in CA · A185755

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

1100 VETERANS BLVD, Redwood City, CA 94063

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Other Names 1

Other Name (5)Marisa Smith Md, Mph

Secondary Practice Locations 3

Location 1300 Pasteur DrStanford, CA 94305-2200 · Phone (650) 723-4000

Location 26655 Alvarado RdSan Diego, CA 92120-5208 · Phone (800) 926-8273

Location 31415 Ross AveEl Centro, CA 92243-4306 · Phone (800) 926-8273

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

Marisa Tienyun Smith 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 ID7315296399

PECOS Enrollment IDI20230707000998

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 5

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.

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

196 services194 patients

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

28 services28 patients

Ultrasound of heart, follow-up 93308

A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.

21 services21 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

19 services19 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.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94063 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

76.5/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

74.31

Promoting Interoperability

100

Improvement Activities

Cost

43.95

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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