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ALIREZA ABDOLLAH SHAMSHIRSAZ M.D.
NPI 1881804235
Obstetrics & Gynecology in Palo Alto, CA

Active since May 23, 2007PECOS Enrolled
725 WELCH RD, PALO ALTO, CA 94304(650) 497-8000 Get Directions Write a Review

NPPES record last updated: March 15, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Alireza Abdollah Shamshirsaz M.d. NPPES

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

ALIREZA ABDOLLAH SHAMSHIRSAZ M.D. (NPI 1881804235) is an individual obstetrics & gynecology provider in Palo Alto, California, licensed in California (C150314) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1881804235
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameALIREZA ABDOLLAH SHAMSHIRSAZCredential: M.D.
Location Address725 WELCH RDPalo Alto, CA 94304-1601
Mailing Address725 Welch RdPalo Alto, CA 94304-1601 · (650) 497-8000
Phone(650) 497-8000
Sole ProprietorNo
Enumeration DateMay 23, 2007
Last NPPES UpdateMarch 15, 2023
NPPES CertifiedMarch 15, 2023
✔ NPI 1881804235 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · C150314
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.
Also ListedObstetrics & Gynecology · Maternal & Fetal MedicineTaxonomy 207VM0101X · License C150314 (CA), 291731 (MA)
725 WELCH RD, Palo Alto, CA 94304
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Other Names 1

Other Name (5)Alireza Shamshirsaz M.d.

Secondary Practice Locations 2

Location 1200 Hawkins DrIowa City, IA 52242-1009 · Phone (319) 356-1616 · Fax (319) 384-6004
Location 2300 Longwood AveBoston, MA 02115-5724 · Phone (617) 355-6000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alireza Abdollah Shamshirsaz 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 Reassignments

7

Medicare enrollment records show Alireza Abdollah Shamshirsaz reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Lpch Medical Group Div Of Lucile
Same address
Children
725 WELCH RD
Palo Alto, CA 94304
  • Reassigned Medicare billing, California enrollment
  • 3,617 clinicians in this Medicare group
NPI 1417907940 (650) 498-6762
Stanford Health Care
0.2 mi
General Acute Care Hospital
300 PASTEUR DRIVE
Stanford, CA 94305
  • Reassigned Medicare billing, California enrollment
  • 4,258 clinicians in this Medicare group
NPI 1437292927 (650) 723-4000
Baylor College Of Medicine
1,470 mi
Pediatrics
333 N SANTA ROSA
San Antonio, TX 78207
  • Reassigned Medicare billing, Texas enrollment
  • 453 clinicians in this Medicare group
NPI 1285079764 (210) 704-3030
Dell Children's Medical Group
1,480 mi
Pediatrics
1000 HESTERS CROSSING RD
Round Rock, TX 78681
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Dell Childrens Medical Group
  • 576 clinicians in this Medicare group
NPI 1790103869 (512) 628-1800
Baylor College Of Medicine
1,627 mi
Internal Medicine
6620 MAIN ST
Houston, TX 77030
  • Reassigned Medicare billing, Texas enrollment
  • 2,296 clinicians in this Medicare group
NPI 1104867175 (713) 798-2500
Texas Children's Physician Group
1,627 mi
Pediatrics
6621 FANNIN ST
Houston, TX 77030
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Texas Childrens Physician Group
  • 2,498 clinicians in this Medicare group
NPI 1861675506 (832) 824-1000
Chmc Surgical Foundation Inc
2,694 mi
Pediatric Surgery
300 LONGWOOD AVE, FEGAN 3
Boston, MA 02115
  • Reassigned Medicare billing, Massachusetts enrollment
  • 109 clinicians in this Medicare group
NPI 1902977515 (617) 355-8326

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 94304 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$86.56 typical visit price
range $23.96 – $169.60
Typical copayment $21.64 (range $5.99 – $42.40)
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 20

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

EIRI INENAGA MS, OTR/L
Occupational Therapist (Pediatrics)
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8218
WENDY LEIGH ADAMS ARNP
Nurse Practitioner (Neonatal)
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
KEVIN WEI-HAN CHI MD
Pediatrics
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
ASHEEN RAMA MD
Anesthesiology (Pediatric Anesthesiology)
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
CRYSTAL LEE MACKALL MD
Pediatrics (Pediatric Hematology-Oncology)
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
KRISTI LYNNE O'CONNOR OT
Occupational Therapist
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
LAUREN GENNA ROOS NP
Nurse Practitioner
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
SHALINI MITTAL MD
Hospitalist
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000

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 Alireza Abdollah Shamshirsaz's NPI number?

The NPI number for Alireza Abdollah Shamshirsaz is 1881804235. It was assigned to this individual provider in the NPPES registry on May 23, 2007. The provider is also known as Alireza Shamshirsaz M.D..

Where is Alireza Abdollah Shamshirsaz located?

Alireza Abdollah Shamshirsaz practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.

What is Alireza Abdollah Shamshirsaz's specialty?

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

Is Alireza Abdollah Shamshirsaz enrolled in Medicare?

Yes. Alireza Abdollah Shamshirsaz is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Alireza Abdollah Shamshirsaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alireza Abdollah Shamshirsaz reassigns Medicare benefits to 7 organizations: Lpch Medical Group Div Of Lucile (Palo Alto, CA), Stanford Health Care (Stanford, CA), Baylor College Of Medicine (San Antonio, TX), Dell Children's Medical Group (Round Rock, TX), Baylor College Of Medicine (Houston, TX) and 2 more organizations, listed in the Medicare section above. Each 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 Alireza Abdollah Shamshirsaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Alireza Abdollah Shamshirsaz accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 7 other insurers list Alireza Abdollah Shamshirsaz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Alireza Abdollah Shamshirsaz was last updated on March 15, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.