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

MARIANNE LOUISE KRAMER MD
NPI 1801848601
Internal Medicine in Sonoma, CA

Active since May 17, 2006PECOS Enrolled
15000 ARNOLD DRIVE, SONOMA, CA 95431(707) 938-6556 Get Directions Write a Review

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

About Marianne Louise Kramer Md NPPES

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

MARIANNE LOUISE KRAMER MD (NPI 1801848601) is an individual internal medicine provider in Sonoma, California, licensed in California (G695540) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1801848601
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMARIANNE LOUISE KRAMERCredential: MD
Location Address15000 ARNOLD DRIVESonoma, CA 95431-1493
Mailing Address1600 9th St, Room 205 Mailstop 2-3Sacramento, CA 95814-6414 · (916) 654-2431 · Fax (916) 654-3186
Phone(707) 938-6556
Sole ProprietorNo
Enumeration DateMay 17, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1801848601 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 · G695540
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.
15000 ARNOLD DRIVE, Sonoma, CA 95431
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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)

Marianne Louise Kramer Md 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 95431 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
$142.00 typical visit price
range $63.04 – $187.01
Typical copayment $35.50 (range $15.76 – $46.75)
Most-billed visit code 99204
Established Patient
$109.88 typical visit price
range $21.02 – $153.40
Typical copayment $27.47 (range $5.25 – $38.35)
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.

GERALD JOSEPH CAMARATA MD
Family Medicine
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
BRIAN S PECHA MD
Internal Medicine
15000 ARNOLD DRIVE
ELDRIDGE, CA 95431
Sonoma County (707) 938-6000
DAVID SHERIDAN GRAY MD
Family Medicine
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
CAROL ANNE CASTILLO MD
Family Medicine
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
MS. BRENDA LEE ALBERTZ RN FNP
Nurse Practitioner
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
MICHAEL LORY WYMORE MD
Anesthesiology
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
DR. KATHERINE E WALKER MD
Family Medicine
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556
DR. MICHAEL B LASH MD
Otolaryngology
15000 ARNOLD DRIVE
SONOMA, CA 95431
Sonoma County (707) 938-6556

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 Marianne Kramer's NPI number?

The NPI number for Marianne Kramer is 1801848601. It was assigned to this individual provider in the NPPES registry on May 17, 2006.

Where is Marianne Kramer located?

Marianne Kramer practices at 15000 Arnold Drive, Sonoma, CA 95431. The listed phone number is (707) 938-6556.

What is Marianne Kramer's specialty?

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

Is Marianne Kramer enrolled in Medicare?

Yes. Marianne Kramer is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Marianne Kramer 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 28 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.