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DR. KATHERINE ELIZABETH OAKLEY M.D.
NPI 1083064935
General Practice in Claremont, CA

Active since June 21, 2016PECOS Enrolled
73.62/100
CMS Quality Rating
1601 MONTE VISTA AVE STE 190, CLAREMONT, CA 91711(909) 865-9977 Get Directions Write a Review

NPPES record last updated: December 6, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Dec 6, 2021, Nov 15, 2018, Jun 21, 2016 (3 updates tracked since 2016).

About Dr. Katherine Elizabeth Oakley M.d. NPPES

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

DR. KATHERINE ELIZABETH OAKLEY M.D. (NPI 1083064935) is an individual general practice provider in Claremont, California, licensed in California (A157730) and active in the NPI registry since June 2016. She is enrolled in Medicare PECOS and maintains a secondary practice location in Colton.

NPPES Registry Identity

NPI1083064935
Entity TypeIndividualFemale
Primary Taxonomy208D00000X
Provider Legal NameDR. KATHERINE ELIZABETH OAKLEYCredential: M.D.
Location Address1601 MONTE VISTA AVE STE 190Claremont, CA 91711-6600
Mailing Address1601 Monte Vista Ave Ste 190Claremont, CA 91711-6600 · (909) 865-9977
Phone(909) 865-9977
Sole ProprietorNo
Enumeration DateJune 21, 2016
Last NPPES UpdateDecember 6, 20213 updates tracked since enumeration
✔ NPI 1083064935 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians
Taxonomy Code208D00000X
License✔ Licensed in CA · A157730
Definition
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1601 MONTE VISTA AVE STE 190, Claremont, CA 91711
Open in Google Maps ↗

Secondary Practice Location 1

Location 1400 N Pepper AveColton, CA 92324-1801 · Phone (855) 422-8029

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Katherine Elizabeth Oakley 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 Katherine Oakley reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sharp Rees-Stealy Medical Group, Inc
93 mi
Internal Medicine
5651 COPLEY DR STE A
San Diego, CA 92111
  • Reassigned Medicare billing, California enrollment
  • 1,233 clinicians in this Medicare group
NPI 1285616177 (858) 262-6666

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
14 services14 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

73.62/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality74.56
Improvement Activities40
Cost58.69

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.

NICHOLLE A HENLEY D.O.
Family Medicine
1601 MONTE VISTA AVE STE 190
CLAREMONT, CA 91711
Los Angeles County (909) 865-9977
MR. ROY A. GUIZADO P.A.-C.
Physician Assistant
1601 MONTE VISTA AVE STE 190
CLAREMONT, CA 91711
Los Angeles County (909) 865-9977
SEEMA SURESH KAMBLE
Family Medicine
1601 MONTE VISTA AVE STE 190
CLAREMONT, CA 91711
Los Angeles County (909) 865-9977
BRIAN E TESSIER P.A.
Physician Assistant
1601 MONTE VISTA AVE STE 190
CLAREMONT, CA 91711
Los Angeles County (909) 865-9977
DR. MONIQUE MICHELLE BURLEIGH SANCHEZ-CASTRO M.D.
Family Medicine
1601 MONTE VISTA AVE STE 190
CLAREMONT, CA 91711
Los Angeles County (909) 865-9977
TERI L. YOSHITAKE M.D.
Emergency Medicine
1601 MONTE VISTA AVE STE 190
CLAREMONT, CA 91711
Los Angeles County (909) 865-9977
NICHOLAS CHIANG
Physician Assistant
1601 MONTE VISTA AVE STE 190
CLAREMONT, CA 91711
Los Angeles County (909) 865-9977
MR. DARREN ALAN FAVELA PA-C
Physician Assistant
1601 MONTE VISTA AVE STE 190
CLAREMONT, CA 91711
Los Angeles County (909) 865-9977

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 Katherine Oakley's NPI number?

The NPI number for Katherine Oakley is 1083064935. It was assigned to this individual provider in the NPPES registry on June 21, 2016.

Where is Katherine Oakley located?

Katherine Oakley practices at 1601 Monte Vista Ave Ste 190, Claremont, CA 91711. The listed phone number is (909) 865-9977.

What is Katherine Oakley's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Is Katherine Oakley enrolled in Medicare?

Yes. Katherine Oakley is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Katherine Oakley's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Oakley reassigns Medicare benefits to Sharp Rees-Stealy Medical Group, Inc (San Diego, 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 Katherine Oakley'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 Katherine Oakley was last updated on December 6, 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.