Mary D. Crisham Janik, MD

Practice locations

Addresses where Mary D. Crisham Janik is enrolled with Medicare (CMS data updated October 2, 2026).

• 2500 Merced StSan Leandro, CA 94577 (510) 454‑1000

Group practices

Medicare enrollment lists Mary D. Crisham Janik as a member of this group (CMS data updated October 2, 2026).

• Permanente Medical Group Inc10,996 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in California →

Other OB-GYNs in San Leandro

Clinicians with the same Medicare primary specialty in San Leandro, CA — not a recommendation.

• Stephanie Cai, MD
• Lan Na Lee, MD
• Trevor J. Miller, MD
• Clara Lee, DO
• Linda C. Degusta, MD
• Katharine B. Simmons, MD
• Olga Ramm, MD
• Talis M. Swisher, MD

All OB-GYNs in San Leandro →

Other clinicians in Permanente Medical Group Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Komalpreet Kaur, MD
• Jhoanne Bautista, MD
• Benjamin Sokoloff, DO
• Jason Lam, MD
• Noah Mischka A. Gerken, MD
• Ricardo O. Hamilton, MD

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
3. Medicare Care Compare — official Medicare tool to look up clinicians