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DR. GENA LEE LEWIS MD
NPI 1124053830
Pediatrics in Oakland, CA

Active since July 11, 2006PECOS Enrolled
5220 CLAREMONT AVE, OAKLAND, CA 94618(510) 428-3885(510) 547-2702 Get Directions Write a Review

NPPES record last updated: July 18, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Gena Lee Lewis Md NPPES

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

DR. GENA LEE LEWIS MD (NPI 1124053830) is an individual pediatrics provider in Oakland, California, licensed in California (A061397) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1124053830
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. GENA LEE LEWISCredential: MD
Location Address5220 CLAREMONT AVEOakland, CA 94618-1033
Mailing Address5220 Claremont AveOakland, CA 94618-1033 · (510) 428-3885 · Fax (510) 547-2702
Phone(510) 428-3885
Fax(510) 547-2702
Sole ProprietorNo
Enumeration DateJuly 11, 2006
Last NPPES UpdateJuly 18, 2007
✔ NPI 1124053830 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · A061397
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.
5220 CLAREMONT AVE, Oakland, CA 94618
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Other Identifiers 1

MedicaidGR0095800CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gena Lee Lewis 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 Reassignments

3

Medicare enrollment records show Gena Lewis reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of California San Francisco
12 mi
Surgery
400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 5,645 clinicians in this Medicare group
NPI 1346329380 (415) 353-2161
Ucsf Medical Group Business Services
12 mi
Internal Medicine
400 PARNASSUS AVE
San Francisco, CA 94122
  • Reassigned Medicare billing, California enrollment
  • 5,544 clinicians in this Medicare group
NPI 1477624104 (415) 353-2808
Ucsf Pediatrics Associates
12 mi
Pediatrics
505 PARNASSUS AVE
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 1,159 clinicians in this Medicare group
NPI 1376614016 (415) 353-2000

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 94618 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.

DR. PAMELA JANINE SIMMS-MACKEY M.D.
Pediatrics
5220 CLAREMONT AVE
OAKLAND, CA 94618
Alameda County (510) 428-3129
YINGYING WANG
Pharmacist
5220 CLAREMONT AVE
OAKLAND, CA 94618
Alameda County (510) 428-4088
MINDY S BENSON RN MSN PNP
Nurse Practitioner (Pediatrics)
5220 CLAREMONT AVE
OAKLAND, CA 94618
Alameda County (510) 428-3885
KAREN JANE VILLANUEVA RN, LAC, DAIMC
Acupuncturist
5220 CLAREMONT AVE
OAKLAND, CA 94618
Alameda County (510) 428-3226
MS. MARGARET HENDERSON BUSHER LCSW
Social Worker (Clinical)
5220 CLAREMONT AVE, SECON FLOOR
OAKLAND, CA 94618
Alameda County (510) 428-3885
JANET GRAUL R.N., P.N.P.
Nurse Practitioner (Pediatrics)
5220 CLAREMONT AVE
OAKLAND, CA 94618
Alameda County (510) 428-3129
OAKLAND CLINIC PHARMACY
Pharmacist
5220 CLAREMONT AVE
OAKLAND, CA 94618
Alameda County (510) 428-4088
DR. LYDIA ANN TINAJERO-DECK M.D.
Pediatrics
5220 CLAREMONT AVE
OAKLAND, CA 94618
Alameda County (510) 428-3129

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 Gena Lewis's NPI number?

The NPI number for Gena Lewis is 1124053830. It was assigned to this individual provider in the NPPES registry on July 11, 2006.

Where is Gena Lewis located?

Gena Lewis practices at 5220 Claremont Ave, Oakland, CA 94618. The listed phone number is (510) 428-3885.

What is Gena Lewis's specialty?

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

Is Gena Lewis enrolled in Medicare?

Yes. Gena Lewis is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gena Lewis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gena Lewis reassigns Medicare benefits to 3 organizations: University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and Ucsf Pediatrics Associates (San Francisco, 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 Gena Lewis'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 Gena Lewis was last updated on July 18, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.