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DR. KATHRYN JOANNE HALLSTEN M.D.
NPI 1184750861
Internal Medicine in Portola Valley, CA

Active since February 26, 2007PECOS Enrolled
130 PORTOLA RD, SUITE C, PORTOLA VALLEY, CA 94028(650) 385-1970(650) 851-9701 Get Directions Write a Review

NPPES record last updated: June 4, 2013. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Kathryn Joanne Hallsten M.d. NPPES

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

DR. KATHRYN JOANNE HALLSTEN M.D. (NPI 1184750861) is an individual internal medicine provider in Portola Valley, California, licensed in California (G60511) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1184750861
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. KATHRYN JOANNE HALLSTENCredential: M.D.
Location Address130 PORTOLA RD, SUITE CPortola Valley, CA 94028-7825
Mailing Address1156 Ramona StPalo Alto, CA 94301-2445 · (650) 325-9906 · Fax (650) 325-1295
Phone(650) 385-1970
Fax(650) 851-9701
Sole ProprietorYes
Enumeration DateFebruary 26, 2007
Last NPPES UpdateJune 4, 2013
✔ NPI 1184750861 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 · G60511
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.
130 PORTOLA RD, Portola Valley, CA 94028
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Other Names 1

Other Name (5)Dr. Kathryn Joanne Hallsten Ritchey M.d.

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Kathryn Joanne Hallsten M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94028 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.

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 Kathryn Hallsten's NPI number?

The NPI number for Kathryn Hallsten is 1184750861. It was assigned to this individual provider in the NPPES registry on February 26, 2007. The provider is also known as Dr. Kathryn Joanne Hallsten Ritchey M.D..

Where is Kathryn Hallsten located?

Kathryn Hallsten practices at 130 Portola Rd Suite C, Portola Valley, CA 94028. The listed phone number is (650) 385-1970.

What is Kathryn Hallsten's specialty?

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

Is Kathryn Hallsten enrolled in Medicare?

Yes. Kathryn Hallsten is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Kathryn Hallsten was last updated on June 4, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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.