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HADIA SIDDIQUI M.D.
NPI 1356611370
Pediatrics in Hayward, CA

Active since January 06, 2012PECOS Enrolled
27303 SLEEPY HOLLOW AVE S, HAYWARD, CA 94545(510) 454-1000 Get Directions Write a Review

NPPES record last updated: December 15, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Hadia Siddiqui M.d. NPPES

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

HADIA SIDDIQUI M.D. (NPI 1356611370) is an individual pediatrics provider in Hayward, California, licensed in California (A115715) and active in the NPI registry since January 2012. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1356611370
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameHADIA SIDDIQUICredential: M.D.
Location Address27303 SLEEPY HOLLOW AVE SHayward, CA 94545-4203
Mailing Address27303 Sleepy Hollow Ave SHayward, CA 94545-4203 · (510) 454-1000
Phone(510) 454-1000
Sole ProprietorNo
Enumeration DateJanuary 6, 2012
Last NPPES UpdateDecember 15, 2021
✔ NPI 1356611370 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · A115715
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
27303 SLEEPY HOLLOW AVE S, Hayward, CA 94545
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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)

Hadia Siddiqui 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 Hadia Siddiqui reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
12 mi
Internal Medicine
1190 VETERANS BLVD
Redwood City, CA 94063
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1639252604 (650) 299-2000

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 94545 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
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.

GEORGE LAI M.D.
Internal Medicine (Nephrology)
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 454-1000
ELAINE K ONG M.D.
Pediatrics
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 454-1000
DAYNA TAI
Pharmacist
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 784-4589
RANGASHREE VARADARAJAN MD
Internal Medicine (Nephrology)
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 784-2769
ARMANDO LASARO PLATA M.D.
Urology
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 454-1000
LUCY OANH PHUONG M.D.
Pediatrics
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 454-1000
NATALIE CAC
Allergy & Immunology
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 784-6225
OLGA LEMBERG MD
Pediatrics
27303 SLEEPY HOLLOW AVE S
HAYWARD, CA 94545
Alameda County (510) 752-1000

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 Hadia Siddiqui's NPI number?

The NPI number for Hadia Siddiqui is 1356611370. It was assigned to this individual provider in the NPPES registry on January 6, 2012.

Where is Hadia Siddiqui located?

Hadia Siddiqui practices at 27303 Sleepy Hollow Ave S, Hayward, CA 94545. The listed phone number is (510) 454-1000.

What is Hadia Siddiqui's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Hadia Siddiqui enrolled in Medicare?

Yes. Hadia Siddiqui is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Hadia Siddiqui's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hadia Siddiqui reassigns Medicare benefits to Permanente Medical Group Inc (Redwood City, 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 Hadia Siddiqui'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 Hadia Siddiqui was last updated on December 15, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.