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SHANTI KARUNA LEON GUERRERO MD/MPH
NPI 1386033090
Family Medicine in Oakland, CA

Active since January 19, 2015PECOS EnrolledAccepts Medicare Assignment
3451 E 12TH ST, OAKLAND, CA 94601(510) 535-3500(510) 535-3319 Get Directions Write a Review

NPPES record last updated: March 29, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 29, 2023, Mar 11, 2020 (2 updates tracked since 2020).

About Shanti Karuna Leon Guerrero Md/mph NPPES

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

SHANTI KARUNA LEON GUERRERO MD/MPH (NPI 1386033090) is an individual family medicine provider in Oakland, California, licensed in California (A155088) and active in the NPI registry since January 2015. She is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (2015).

NPPES Registry Identity

NPI1386033090
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameSHANTI KARUNA LEON GUERREROCredential: MD/MPH
Location Address3451 E 12TH STOakland, CA 94601-3463
Mailing AddressPo Box 22210Oakland, CA 94623-2210 · (510) 535-4000 · Fax (510) 535-4189
Phone(510) 535-3500
Fax(510) 535-3319
Sole ProprietorNo
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 2015
Enumeration DateJanuary 19, 2015
Last NPPES UpdateMarch 29, 20232 updates tracked since enumeration
NPPES CertifiedMarch 29, 2023
✔ NPI 1386033090 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · A155088
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
3451 E 12TH ST, Oakland, CA 94601
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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 and accepts Medicare assignment

Shanti Karuna Leon Guerrero Md/mph is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1557695145
PECOS Enrollment IDI20190702001741
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 Shanti Leon Guerrero reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

La Clinica De La Raza Inc
Same address
Federally Qualified Health Center (FQHC)
3451 E 12TH ST
Oakland, CA 94601
  • Reassigned Medicare billing, California enrollment
  • 187 clinicians in this Medicare group
NPI 1144336181 (510) 535-4000
County Of Santa Clara
24 mi
Clinic/Center
2741 MIDDLEFIELD RD
Palo Alto, CA 94306
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1043354020 (California), NPI 1629301346 (California)
  • 2,460 clinicians in this Medicare group
NPI 1285228080 (408) 885-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Hemoglobin a1c level 83036
Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.
22 services20 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94601 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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
8 suppliers19 claims52 services$3.85 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
6 suppliers12 claims13 services$1.05 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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. KEN MAKIO MARRINER M.D.
Family Medicine
3451 E 12TH ST
OAKLAND, CA 94601
Alameda County (510) 535-3500
MS. MARSHA L GUBSER LCSW
Social Worker (Clinical)
3451 E 12TH ST
OAKLAND, CA 94601
Alameda County (925) 363-2005
REBECCA RUSH RN
Registered Nurse (Community Health)
3451 E 12TH ST
OAKLAND, CA 94601
Alameda County (510) 535-3735
MONICA SAN BASILIO FNP
Nurse Practitioner
3451 E 12TH ST
OAKLAND, CA 94601
Alameda County (510) 535-3500
SIVAN SADEH FNP-C
Nurse Practitioner (Family)
3451 E 12TH ST
OAKLAND, CA 94601
Alameda County (510) 535-3500
ANNA GABRIELA YCAZA RN,FNP-C
Nurse Practitioner (Family)
3451 E 12TH ST
OAKLAND, CA 94601
Alameda County (510) 535-2940
LAYLA WELBORN FNP
Nurse Practitioner (Family)
3451 E 12TH ST
OAKLAND, CA 94601
Alameda County (510) 535-3500
DR. JESSIE LIU MD
Hospitalist
3451 E 12TH ST
OAKLAND, CA 94601
Alameda County (510) 535-3500

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 Shanti Leon Guerrero's NPI number?

The NPI number for Shanti Leon Guerrero is 1386033090. It was assigned to this individual provider in the NPPES registry on January 19, 2015.

Where is Shanti Leon Guerrero located?

Shanti Leon Guerrero practices at 3451 E 12th St, Oakland, CA 94601. The listed phone number is (510) 535-3500.

What is Shanti Leon Guerrero's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Shanti Leon Guerrero enrolled in Medicare?

Yes. Shanti Leon Guerrero is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Shanti Leon Guerrero's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Shanti Leon Guerrero reassigns Medicare benefits to 2 organizations: La Clinica De La Raza Inc (Oakland, CA) and County Of Santa Clara (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 Shanti Leon Guerrero'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 Shanti Leon Guerrero was last updated on March 29, 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.