Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

KATHERINE THERESA RUDDY PA-C
NPI 1669180055
Physician Assistant in Scottsdale, AZ

Q: What is Katherine Ruddy's NPI number?

The NPI number for Katherine Ruddy is 1669180055. It was assigned to this individual provider in the NPPES registry on November 14, 2022. The provider is also known as Katherine Theresa Witte Pa-C.

Q: What is Katherine Ruddy's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Q: When was this NPI record last updated?

The NPPES record for Katherine Ruddy was last updated on October 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 days 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.

Active since November 14, 2022PECOS Enrolled

8630 E VIA DE VENTURA STE 201, SCOTTSDALE, AZ 85258(480) 558-3744 Get Directions Write a Review

NPPES record last updated: October 19, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jun 10, 2025, Jan 5, 2023, Nov 14, 2022 (3 updates tracked since 2022).

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About Katherine Theresa Ruddy Pa-c NPPES

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

KATHERINE THERESA RUDDY PA-C (NPI 1669180055) is an individual physician assistant in Scottsdale, Arizona and active in the NPI registry since November 2022. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1669180055

Entity TypeIndividualFemale

Primary Taxonomy363A00000X

Provider Legal NameKATHERINE THERESA RUDDYCredential: PA-C

Location Address8630 E VIA DE VENTURA STE 201Scottsdale, AZ 85258-3358

Mailing Address1325 N Litchfield Rd Ste 125Goodyear, AZ 85395-1215 · (480) 420-0749

Phone(480) 558-3744

Sole ProprietorYes

Medical School CMSOtherGraduated 2017

Enumeration DateNovember 14, 2022

Last NPPES UpdateOctober 19, 20263 updates tracked since enumeration

NPPES CertifiedOctober 19, 2026

✔ NPI 1669180055 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363A00000X

Definition

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

8630 E VIA DE VENTURA STE 201, Scottsdale, AZ 85258

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Other Names 1

Former Name (1)Katherine Theresa Witte Pa-c

Secondary Practice Locations 2

Location 11840 S Stapley Dr Ste 137Mesa, AZ 85204-6683 · Phone (480) 558-3744

Location 21325 N Litchfield Rd Ste 125Goodyear, AZ 85395-1215 · Phone (480) 420-0749

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter Health, Antidote Health Plan of Arizona, Inc. and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Katherine Theresa Ruddy Pa-c 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 ID3476924366

PECOS Enrollment IDI20230201002230

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.

Areas of Expertise CMS Part B claims 9

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 moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

110 services95 patients

X-ray of lower and sacral spine, minimum of 4 views 72110

An X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.

75 services72 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

75 services75 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

64 services45 patients

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.

53 services42 patients

X-ray of upper spine, 4-5 views 72050

An X-ray of the upper spine with 4-5 views is a non-invasive imaging test. It uses radiation to capture detailed images of the bones and structures in your neck and upper back. This procedure helps identify issues like fractures, infections, or deformities.

26 services24 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85258 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

$85.89 typical visit price

range $55.44 – $168.60

Typical copayment $21.47 (range $13.86 – $42.15)

Most-billed visit code 99203

Established Patient

$69.24 typical visit price

range $17.72 – $137.41

Typical copayment $17.31 (range $4.43 – $34.35)

Most-billed visit code 99213

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 9

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

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