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DR. PELEN TAMMY WU MD
NPI 1194828707
Pediatrics in Orinda, CA

Active since September 07, 2006PECOS Enrolled
3 ALTARINDA RD STE 300, ORINDA, CA 94563(925) 254-9500(925) 254-9505 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 21, 2022, Jun 13, 2017 (2 updates tracked since 2017).

About Dr. Pelen Tammy Wu Md NPPES

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

DR. PELEN TAMMY WU MD (NPI 1194828707) is an individual pediatrics provider in Orinda, California, licensed in California (A75735) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1194828707
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. PELEN TAMMY WUCredential: MD
Location Address3 ALTARINDA RD STE 300Orinda, CA 94563-2601
Mailing Address3 Altarinda Rd Ste 300Orinda, CA 94563-2601 · (925) 254-9500 · Fax (925) 254-9505
Phone(925) 254-9500
Fax(925) 254-9505
Sole ProprietorNo
Enumeration DateSeptember 7, 2006
Last NPPES UpdateJuly 21, 20222 updates tracked since enumeration
✔ NPI 1194828707 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · A75735
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.
3 ALTARINDA RD STE 300, Orinda, CA 94563
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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)

Dr. Pelen Tammy Wu 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.

Medicare Billing Reassignment

Medicare enrollment records show Pelen Wu reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

John Muir Physician Network
7.7 mi
General Practice
1450 TREAT BLVD, SUITE 300
Walnut Creek, CA 94597
  • Reassigned Medicare billing, California enrollment
  • 650 clinicians in this Medicare group
NPI 1841407665 (925) 296-9872

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 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
$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 3

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

SARAH ASHLAND
Pediatrics
3 ALTARINDA RD STE 300
ORINDA, CA 94563
Contra Costa County (925) 254-9500
DR. ROBIN GOLDENBERG MEEZAN MD
Pediatrics
3 ALTARINDA RD STE 300
ORINDA, CA 94563
Contra Costa County (925) 254-9500
DR. JAMES DANIEL EVANS M.D.
Pediatrics
3 ALTARINDA RD STE 300
ORINDA, CA 94563
Contra Costa County (925) 385-0928

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 Pelen Wu's NPI number?

The NPI number for Pelen Wu is 1194828707. It was assigned to this individual provider in the NPPES registry on September 7, 2006.

Where is Pelen Wu located?

Pelen Wu practices at 3 Altarinda Rd Ste 300, Orinda, CA 94563. The listed phone number is (925) 254-9500.

What is Pelen Wu's specialty?

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

Is Pelen Wu enrolled in Medicare?

Yes. Pelen Wu is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Pelen Wu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Pelen Wu reassigns Medicare benefits to John Muir Physician Network (Walnut Creek, 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 Pelen Wu'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 Pelen Wu was last updated on July 21, 2022. 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.