DR. CHELSEA JOY THOMSEN M.D., M.S.P.H
NPI 1003227927
Internal Medicine in San Francisco, CA

Q: What is Chelsea Thomsen's NPI number?

The NPI number for Chelsea Thomsen is 1003227927. It was assigned to this individual provider in the NPPES registry on May 13, 2014. The provider is also known as Dr. Chelsea Joy Mcgarvey.

Q: What is Chelsea Thomsen'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 Chelsea Thomsen was last updated on March 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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 May 13, 2014PECOS EnrolledAccepts Medicare Assignment

2 W PORTAL AVE, SAN FRANCISCO, CA 94127(415) 291-0480(415) 252-7176 Get Directions Write a Review

NPPES record last updated: March 14, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 14, 2025, Mar 15, 2023, Jun 27, 2018 and 1 more (4 updates tracked since 2017).

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About Dr. Chelsea Joy Thomsen M.d., M.s.p.h NPPES

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

DR. CHELSEA JOY THOMSEN M.D., M.S.P.H (NPI 1003227927) is an individual internal medicine provider in San Francisco, California, licensed in California (A170520) and active in the NPI registry since May 2014. She is enrolled in Medicare PECOS, maintains a secondary practice location in San Francisco, and is a graduate of University Of Arizona College Of Medicine (2014).

NPPES Registry Identity

NPI1003227927

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameDR. CHELSEA JOY THOMSENCredential: M.D., M.S.P.H

Location Address2 W PORTAL AVESan Francisco, CA 94127-1304

Mailing Address1 Embarcadero Ctr Ste 1900San Francisco, CA 94111-3723 · (415) 658-6791

Phone(415) 291-0480

Fax(415) 252-7176

Sole ProprietorNo

Medical School CMSUniversity Of Arizona College Of MedicineGraduated 2014

Enumeration DateMay 13, 2014

Last NPPES UpdateMarch 14, 20254 updates tracked since enumeration

NPPES CertifiedMarch 14, 2025

✔ NPI 1003227927 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 · A170520✔ Licensed in AZ · 50576

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.

2 W PORTAL AVE, San Francisco, CA 94127

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Other Names 1

Former Name (1)Dr. Chelsea Joy Mcgarvey

Secondary Practice Location 1

Location 11998 Market StSan Francisco, CA 94102-6228 · Phone (415) 790-6040

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

Dr. Chelsea Joy Thomsen M.d., M.s.p.h 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 ID7810116662

PECOS Enrollment IDI20211213001196

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.

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.

62 services32 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.

51 services24 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

48 services37 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.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94127 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 6

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

DAVID J. SLY DO

Family Medicine