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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.

ALEXANDRA SOFIA CALDERON MD
NPI 1780333146
Obstetrics & Gynecology in Orinda, CA

Active since March 22, 2022PECOS Enrolled
3 ALTARINDA RD STE 200, ORINDA, CA 94563(925) 254-9840(925) 254-9842 Get Directions Write a Review

NPPES record last updated: October 21, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Alexandra Sofia Calderon Md NPPES

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

ALEXANDRA SOFIA CALDERON MD (NPI 1780333146) is an individual obstetrics & gynecology provider in Orinda, California, licensed in California (A188951) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1780333146
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameALEXANDRA SOFIA CALDERONCredential: MD
Location Address3 ALTARINDA RD STE 200Orinda, CA 94563-2601
Mailing Address3 Altarinda Rd Ste 200Orinda, CA 94563-2601 · (925) 254-9840 · Fax (925) 254-9842
Phone(925) 254-9840
Fax(925) 254-9842
Sole ProprietorNo
Enumeration DateMarch 22, 2022
Last NPPES UpdateOctober 21, 2026
NPPES CertifiedOctober 21, 2026
✔ NPI 1780333146 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · A188951
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
3 ALTARINDA RD STE 200, Orinda, CA 94563
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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)

Alexandra Sofia Calderon 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 94563 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
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
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 4

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

DR. TIFFANY ELKIN PERRY M.D.
Obstetrics & Gynecology (Obstetrics)
3 ALTARINDA RD STE 200
ORINDA, CA 94563
Contra Costa County (925) 254-9840
DR. JOSEPH HAGGERTY III MD
Obstetrics & Gynecology
3 ALTARINDA RD STE 200
ORINDA, CA 94563
Contra Costa County (925) 254-9840
DR. JOHN FRANKLIN LENNOX DO
Obstetrics & Gynecology
3 ALTARINDA RD STE 200
ORINDA, CA 94563
Contra Costa County (925) 254-9840
ELIZABETH MARSTON WHNP-BC
Nurse Practitioner
3 ALTARINDA RD STE 200
ORINDA, CA 94563
Contra Costa County (925) 254-9840

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 Alexandra Calderon's NPI number?

The NPI number for Alexandra Calderon is 1780333146. It was assigned to this individual provider in the NPPES registry on March 22, 2022.

Where is Alexandra Calderon located?

Alexandra Calderon practices at 3 Altarinda Rd Ste 200, Orinda, CA 94563. The listed phone number is (925) 254-9840.

What is Alexandra Calderon's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Alexandra Calderon enrolled in Medicare?

Yes. Alexandra Calderon is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Alexandra Calderon was last updated on October 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.