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

SARAH KAY PA
NPI 1538634209
Physician Assistant in San Marcos, CA

Q: What is Sarah Kay's NPI number?

The NPI number for Sarah Kay is 1538634209. It was assigned to this individual provider in the NPPES registry on October 9, 2018. The provider is also known as Sarah Lyon PA.

Q: What is Sarah Kay's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Q: When was this NPI record last updated?

The NPPES record for Sarah Kay was last updated on July 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 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 October 09, 2018PECOS EnrolledAccepts Medicare Assignment

150 VALPREDA RD, SAN MARCOS, CA 92069(760) 736-6767 Get Directions Write a Review

NPPES record last updated: July 20, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Jul 20, 2026, Dec 12, 2024, May 18, 2021 and 3 more (6 updates tracked since 2018).

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About Sarah Kay Pa NPPES

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

SARAH KAY PA (NPI 1538634209) is an individual physician assistant in San Marcos, California and active in the NPI registry since October 2018. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2019).

NPPES Registry Identity

NPI1538634209

Entity TypeIndividualFemale

Primary Taxonomy363A00000X

Provider Legal NameSARAH KAYCredential: PA

Location Address150 VALPREDA RDSan Marcos, CA 92069-2973

Mailing Address150 Valpreda RdSan Marcos, CA 92069-2973 · (760) 736-6767

Phone(760) 736-6767

Sole ProprietorYes

Medical School CMSOtherGraduated 2019

Enumeration DateOctober 9, 2018

Last NPPES UpdateJuly 20, 20266 updates tracked since enumeration

NPPES CertifiedJuly 20, 2026

✔ NPI 1538634209 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363A00000X

Definition

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

150 VALPREDA RD, San Marcos, CA 92069

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Other Names 1

Former Name (1)Sarah Lyon Pa

Secondary Practice Locations 2

Location 12575 Yorba Linda BlvdFullerton, CA 92831-1615 · Phone (714) 449-7400

Location 2225 E 2nd AveEscondido, CA 92025-4212 · Phone (760) 291-6700

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

Sarah Kay Pa 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 ID1759710437

PECOS Enrollment IDI20210524001151

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 7

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 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.

169 services160 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

42 services38 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.

42 services42 patients

Detection test by immunoassay with direct visual observation for influenza virus 87804

This is a test that identifies the influenza virus in your body. It works by using an immunoassay, a method that detects the presence of the virus through an immune response. The results are directly observable, making it a quick and efficient way to diagnose flu.

24 services13 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

17 services17 patients

Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus 87426

An immunoassay test for severe acute respiratory syndrome coronavirus is a diagnostic tool. It uses your body's immune response to detect the presence of the virus. It involves taking a sample, usually from your nose or throat, which is then analyzed in a lab for signs of the virus.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92069 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

$94.87 typical visit price

range $62.10 – $184.71

Typical copayment $23.71 (range $15.52 – $46.17)

Most-billed visit code 99203

Established Patient

$76.87 typical visit price

range $20.62 – $151.42

Typical copayment $19.21 (range $5.15 – $37.85)

Most-billed visit code 99213

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.

DR. GREGORY M SMITH

Dentist (General Practice)