Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. LOUISE CHRISTIE WALTER M.D.
NPI 1689659187
Internal Medicine - Geriatric Medicine in San Francisco, CA

Q: What is Louise Walter's NPI number?

The NPI number for Louise Walter is 1689659187. It was assigned to this individual provider in the NPPES registry on December 7, 2005.

Q: What is Louise Walter's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.

Q: When was this NPI record last updated?

The NPPES record for Louise Walter was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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 December 07, 2005PECOS Enrolled

4150 CLEMENT ST, VA MEDICAL CENTER 181G, SAN FRANCISCO, CA 94121(415) 221-4810(415) 750-6641 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Dr. Louise Christie Walter M.d. NPPES

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

DR. LOUISE CHRISTIE WALTER M.D. (NPI 1689659187) is an individual geriatric medicine provider in San Francisco, California, licensed in California (A061028) and active in the NPI registry since December 2005. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1689659187

Entity TypeIndividualFemale

Primary Taxonomy207RG0300X

Provider Legal NameDR. LOUISE CHRISTIE WALTERCredential: M.D.

Location Address4150 CLEMENT ST, VA MEDICAL CENTER 181GSan Francisco, CA 94121-1545

Mailing Address4150 Clement St, Va Medical Center 181gSan Francisco, CA 94121-1545 · (415) 221-4810 · Fax (415) 750-6641

Phone(415) 221-4810

Fax(415) 750-6641

Sole ProprietorNo

Enumeration DateDecember 7, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1689659187 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RG0300X

License✔ Licensed in CA · A061028

Definition

An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.

4150 CLEMENT ST, San Francisco, CA 94121

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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. Louise Christie Walter 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 94121 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

$202.35 typical visit price

range $69.00 – $202.35

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

Most-billed visit code 99205

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.

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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.

MR. SHANNON KISSINGER MSW

Social Worker