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DR. LYDIA CHRYSSA ALEXANDER M.D.
NPI 1578717237
Internal Medicine in San Francisco, CA

Active since November 07, 2008PECOS Enrolled
2425 GEARY BLVD, SAN FRANCISCO, CA 94115(415) 833-2000 Get Directions Write a Review

NPPES record last updated: November 7, 2008. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Lydia Chryssa Alexander M.d. NPPES

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

DR. LYDIA CHRYSSA ALEXANDER M.D. (NPI 1578717237) is an individual internal medicine provider in San Francisco, California, licensed in California (A100407) and active in the NPI registry since November 2008. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1578717237
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. LYDIA CHRYSSA ALEXANDERCredential: M.D.
Location Address2425 GEARY BLVDSan Francisco, CA 94115-3358
Mailing Address2425 Geary BlvdSan Francisco, CA 94115-3358 · (415) 833-2000
Phone(415) 833-2000
Sole ProprietorNo
Enumeration DateNovember 7, 2008
✔ NPI 1578717237 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 · A100407
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.
2425 GEARY BLVD, San Francisco, CA 94115
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Lydia Chryssa Alexander 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.

Medicare Billing Reassignment

Medicare enrollment records show Lydia Alexander reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
0.2 mi
Internal Medicine
2238 GEARY
San Francisco, CA 94116
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1841373800 (415) 833-2200

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94115 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 20

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

STEVEN PIROG MD
Student in an Organized Health Care Education/Training Program
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-2000
AARON LAM
Student in an Organized Health Care Education/Training Program
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-2000
DR. EMILY SU LEE MD
Student in an Organized Health Care Education/Training Program
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-3034
SOO-JEON CHOI
Pharmacist
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-2331
BRET KINSEY GORDEN LCSW
Social Worker
2425 GEARY BLVD, COORDINATION OF CARE SERVICES DEPARTMENT
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-9934
SRAAVYA KAKARLAPUDI MD
Student in an Organized Health Care Education/Training Program
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-2000
ELLORA ONG PHARMD.
Pharmacist
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-9700
KAISER FOUNDATION HOSPITALS
Pharmacy (Institutional Pharmacy)
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-4255

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 Lydia Alexander's NPI number?

The NPI number for Lydia Alexander is 1578717237. It was assigned to this individual provider in the NPPES registry on November 7, 2008.

Where is Lydia Alexander located?

Lydia Alexander practices at 2425 Geary Blvd, San Francisco, CA 94115. The listed phone number is (415) 833-2000.

What is Lydia Alexander's specialty?

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

Is Lydia Alexander enrolled in Medicare?

Yes. Lydia Alexander is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Lydia Alexander's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lydia Alexander reassigns Medicare benefits to Permanente Medical Group Inc (San Francisco, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lydia Alexander's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Lydia Alexander was last updated on November 7, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.