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DR. GREGORY FRANCIS LUM M.D.
NPI 1366554537
Pediatrics in Los Gatos, CA

Active since August 31, 2006PECOS Enrolled
15000 LOS GATOS BLVD STE 3, LOS GATOS, CA 95032(408) 370-2324(408) 370-2385 Get Directions Write a Review

NPPES record last updated: January 6, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 6, 2023, Jun 27, 2016 (2 updates tracked since 2016).

About Dr. Gregory Francis Lum M.d. NPPES

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

DR. GREGORY FRANCIS LUM M.D. (NPI 1366554537) is an individual pediatrics provider in Los Gatos, California, licensed in California (G 78511) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Palo Alto.

NPPES Registry Identity

NPI1366554537
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameDR. GREGORY FRANCIS LUMCredential: M.D.
Location Address15000 LOS GATOS BLVD STE 3Los Gatos, CA 95032-2017
Mailing AddressPo Box 320925Los Gatos, CA 95032-0115 · (408) 370-2324
Phone(408) 370-2324
Fax(408) 370-2385
Sole ProprietorYes
Enumeration DateAugust 31, 2006
Last NPPES UpdateJanuary 6, 20232 updates tracked since enumeration
NPPES CertifiedJanuary 6, 2023
✔ NPI 1366554537 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · G 78511
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.
15000 LOS GATOS BLVD STE 3, Los Gatos, CA 95032
Open in Google Maps ↗

Secondary Practice Location 1

Location 1725 Welch RdPalo Alto, CA 94304-1601 · Phone (650) 497-8000

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gregory Francis Lum 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

2

Medicare enrollment records show Gregory Lum reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

County Of Santa Clara
4.5 mi
Anesthesiology
751 S. BASCOM AVENUE
San Jose, CA 95128
  • Reassigned Medicare billing, California enrollment
  • 2,460 clinicians in this Medicare group
NPI 1588721500 (408) 885-5000
San Mateo County
18 mi
Community/Behavioral Health
2415 UNIVERSITY AVE STE 301
East Palo Alto, CA 94303
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: County Of San Mateo
  • Also billed through NPI 1831268580 (California)
  • 597 clinicians in this Medicare group
NPI 1710086301 (650) 363-4030

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 95032 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
$106.47 typical visit price
range $70.37 – $206.04
Typical copayment $26.61 (range $17.59 – $51.51)
Most-billed visit code 99203
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
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.

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 Gregory Lum's NPI number?

The NPI number for Gregory Lum is 1366554537. It was assigned to this individual provider in the NPPES registry on August 31, 2006.

Where is Gregory Lum located?

Gregory Lum practices at 15000 Los Gatos Blvd Ste 3, Los Gatos, CA 95032. The listed phone number is (408) 370-2324.

What is Gregory Lum's specialty?

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

Is Gregory Lum enrolled in Medicare?

Yes. Gregory Lum is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gregory Lum's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Lum reassigns Medicare benefits to 2 organizations: County Of Santa Clara (San Jose, CA) and San Mateo County (East Palo Alto, CA). 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 Gregory Lum'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 Gregory Lum was last updated on January 6, 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.