AILEEN MAY ARGUELLES DEL CASTILLO MD
NPI 1205068749
Hospitalist in Riverton, UT

Q: What is Aileen Arguelles Del Castillo's NPI number?

The NPI number for Aileen Arguelles Del Castillo is 1205068749. It was assigned to this individual provider in the NPPES registry on August 18, 2009.

Q: What is Aileen Arguelles Del Castillo's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Active since August 18, 2009PECOS EnrolledAccepts Medicare Assignment

3723 W 12600 S, RIVERTON, UT 84065(801) 507-4384 Get Directions Write a Review

NPPES record last updated: April 8, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 8, 2026, Apr 23, 2019 (2 updates tracked since 2019).

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About Aileen May Arguelles Del Castillo Md NPPES

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

AILEEN MAY ARGUELLES DEL CASTILLO MD (NPI 1205068749) is an individual hospitalist provider in Riverton, Utah, licensed in Utah (9740415-1205) and active in the NPI registry since August 2009. She is enrolled in Medicare PECOS, is affiliated with Utah Valley Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1205068749

Entity TypeIndividualFemale

Primary Taxonomy208M00000X

Provider Legal NameAILEEN MAY ARGUELLES DEL CASTILLOCredential: MD

Location Address3723 W 12600 SRiverton, UT 84065-7295

Mailing AddressPo Box 27128, Mc845Salt Lake City, UT 84127-0128

Phone(801) 507-4384

Sole ProprietorNo

Medical School CMSOtherGraduated 2006

Enumeration DateAugust 18, 2009

Last NPPES UpdateApril 8, 20262 updates tracked since enumeration

NPPES CertifiedApril 8, 2026

✔ NPI 1205068749 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in UT · 9740415-1205

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedInternal MedicineTaxonomy 207R00000X · License 9740415-1205 (UT), 4301094111 (MI)

3723 W 12600 S, Riverton, UT 84065

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Secondary Practice Locations 2

Location 15505 S 900 E Ste 240Murray, UT 84117-7210 · Phone (801) 783-5011

Location 2615 S Bower StGreenville, MI 48838-2614 · Phone (616) 754-4691 · Fax (616) 754-3828

Other Identifiers 1

Medicaid1205068749MI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Molina Healthcare, Select Health.Insurance ›

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

Aileen May Arguelles Del Castillo Md 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 ID7719133800

PECOS Enrollment IDI20160706001685

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

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

Ihc Health Services Inc

0.6 mi

Dental

3723 W 12600 S STE 430
Riverton, UT 84065

Reassigned Medicare billing, Utah enrollment
3,691 clinicians in this Medicare group

NPI 1073177648 (801) 285-4200

Utah Regional Hospitalists LLC

8.9 mi

Hospitalist

5505 S 900 E STE 240
Murray, UT 84117

Reassigned Medicare billing, Utah enrollment
271 clinicians in this Medicare group

NPI 1962821223 (844) 474-4019

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 5

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

113 services71 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

73 services71 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

22 services16 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

19 services19 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

11 services11 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Utah Valley Hospital

Acute Care Hospitals · Provo, UT

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number460001

Location1034 North 500 WestProvo, UT 84604 · Utah County

Emergency services Birthing friendly

Intermountain Medical Center

Acute Care Hospitals · Murray, UT

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number460010

Location5121 South Cottonwood StreetMurray, UT 84107 · Salt Lake County

Emergency services Birthing friendly

Riverton Hospital

Acute Care Hospitals · Riverton, UT

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number460058

Location3741 West 12600 SouthRiverton, UT 84065 · Salt Lake County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 84065 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

$125.70 typical visit price

range $54.34 – $166.03

Typical copayment $31.42 (range $13.58 – $41.50)

Most-billed visit code 99204

Established Patient

$96.35 typical visit price

range $17.23 – $135.20

Typical copayment $24.08 (range $4.30 – $33.80)

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.

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.

Reported Quality Measures

Care Plan

Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…

100%159 patients5/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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. LINDSAY MALECHEK KLIMES MD

Hospitalist

3723 W 12600 S
RIVERTON, UT 84065

Salt Lake County (801) 507-4384

MS. MEGAN N SHAW ATC

Specialist/Technologist (Athletic Trainer)

3723 W 12600 S
RIVERTON, UT 84065

Salt Lake County (801) 285-4650

UNIVERSITY OF UTAH PEDIATRIC SERVICES

Pediatrics

3723 W 12600 S
RIVERTON, UT 84065

Salt Lake County (801) 587-6336

IHC HEALTH SERVICES INC

Pediatrics

3723 W 12600 S, #150
RIVERTON, UT 84065

Salt Lake County (801) 285-4561

DR. BARBARA LYNN CHRISTIANSEN D.O.

Internal Medicine (Geriatric Medicine)

3723 W 12600 S
RIVERTON, UT 84065

Salt Lake County (801) 285-4546

ELYSIA RIZZO MS CCC-SLP

Speech-Language Pathologist

3723 W 12600 S
RIVERTON, UT 84065

Salt Lake County (833) 577-3422

JANE C BOWMAN MD

Obstetrics & Gynecology

3723 W 12600 S, SUITE 360
RIVERTON, UT 84065

Salt Lake County (801) 285-4700

MS. KATHERINE DOUGLAS WESTMORELAND M.D.

Pediatrics

3723 W 12600 S, STE 450
RIVERTON, UT 84065

Salt Lake County (801) 285-4543

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 Aileen Arguelles Del Castillo's NPI number?

The NPI number for Aileen Arguelles Del Castillo is 1205068749. It was assigned to this individual provider in the NPPES registry on August 18, 2009.

Where is Aileen Arguelles Del Castillo located?

Aileen Arguelles Del Castillo practices at 3723 W 12600 S, Riverton, UT 84065. The listed phone number is (801) 507-4384.

What is Aileen Arguelles Del Castillo's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Aileen Arguelles Del Castillo enrolled in Medicare?

Yes. Aileen Arguelles Del Castillo 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 Aileen Arguelles Del Castillo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Aileen Arguelles Del Castillo reassigns Medicare benefits to 2 organizations: Ihc Health Services Inc (Riverton, UT) and Utah Regional Hospitalists LLC (Murray, UT). 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 Aileen Arguelles Del Castillo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Aileen Arguelles Del Castillo accept?

Health plans from Molina Healthcare and Select Health list Aileen Arguelles Del Castillo as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Aileen Arguelles Del Castillo affiliated with any hospitals?

According to CMS data, Aileen Arguelles Del Castillo is affiliated with Utah Valley Hospital, Intermountain Medical Center and Riverton Hospital.

When was this NPI record last updated?

The NPPES record for Aileen Arguelles Del Castillo was last updated on April 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.