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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

NATALIE LORRAINE SIWULA PA
NPI 1487470456
Physician Assistant in Allendale, MI

Active since November 25, 2024PECOS Enrolled
1 CAMPUS DR, ALLENDALE, MI 49401(616) 331-5700(626) 331-5999 Get Directions Write a Review

NPPES record last updated: July 26, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Natalie Lorraine Siwula Pa NPPES

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

NATALIE LORRAINE SIWULA PA (NPI 1487470456) is an individual physician assistant in Allendale, Michigan and active in the NPI registry since November 2024. She is enrolled in Medicare PECOS, is affiliated with Trinity Health Muskegon Hospital, and is a graduate of Other (2025).

NPPES Registry Identity

NPI1487470456
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameNATALIE LORRAINE SIWULACredential: PA
Location Address1 CAMPUS DRAllendale, MI 49401-9403
Mailing Address1670 E Sherman BlvdMuskegon, MI 49444-1863 · (231) 672-3600
Phone(616) 331-5700
Fax(626) 331-5999
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateNovember 25, 2024
Last NPPES UpdateJuly 26, 2026
NPPES CertifiedJuly 26, 2026
✔ NPI 1487470456 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.
1 CAMPUS DR, Allendale, MI 49401
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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

Natalie Lorraine Siwula Pa 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 ID941781611
PECOS Enrollment IDI20260221000141
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.

Hospital Affiliations CMS Care Compare

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

Trinity Health Muskegon Hospital

Acute Care Hospitals · Muskegon, MI
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230066
Location1500 E Sherman BlvdMuskegon, MI 49441 · Muskegon County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 49401 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
$84.74 typical visit price
range $54.34 – $166.68
Typical copayment $21.18 (range $13.58 – $41.67)
Most-billed visit code 99203
Established Patient
$68.07 typical visit price
range $17.09 – $135.40
Typical copayment $17.01 (range $4.27 – $33.85)
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 20

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

DR. MEGHAN ELIZABETH FOX ATC
Specialist/Technologist (Athletic Trainer)
1 CAMPUS DR
ALLENDALE, MI 49401
Ottawa County (616) 331-8541
NICHOLAS STEVENS MAT, ATC
Specialist/Technologist (Athletic Trainer)
1 CAMPUS DR
ALLENDALE, MI 49401
Ottawa County (616) 331-5000
DR. BRIAN EMIL BOSSICK PH.D.
Psychologist (Counseling)
1 CAMPUS DR
ALLENDALE, MI 49401
Ottawa County (616) 331-3266
RUTENDO MAVUNGA NP
Nurse Practitioner
1 CAMPUS DR
ALLENDALE, MI 49401
Ottawa County (616) 331-5000
MR. TODD JACOB JAGER I ATC
Specialist/Technologist (Athletic Trainer)
1 CAMPUS DR, GRAND VALLEY STATE UNIVERSITY, 84 FIELD HOUSE
ALLENDALE, MI 49401
Ottawa County (616) 331-3329
LAYLAH ALI
Specialist/Technologist (Athletic Trainer)
1 CAMPUS DR
ALLENDALE, MI 49401
Ottawa County (616) 331-3133
JESSICA REITMEYER
Specialist/Technologist (Athletic Trainer)
1 CAMPUS DR, FH 066
ALLENDALE, MI 49401
Ottawa County (616) 331-3133
ALEX MICHAEL AAMODT ATS
Student in an Organized Health Care Education/Training Program
1 CAMPUS DR
ALLENDALE, MI 49401
Ottawa County (231) 855-2540

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 Natalie Siwula's NPI number?

The NPI number for Natalie Siwula is 1487470456. It was assigned to this individual provider in the NPPES registry on November 25, 2024.

Where is Natalie Siwula located?

Natalie Siwula practices at 1 Campus Dr, Allendale, MI 49401. The listed phone number is (616) 331-5700.

What is Natalie Siwula's specialty?

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

Is Natalie Siwula enrolled in Medicare?

Yes. Natalie Siwula 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.

Is Natalie Siwula affiliated with any hospitals?

According to CMS data, Natalie Siwula is affiliated with Trinity Health Muskegon Hospital.

When was this NPI record last updated?

The NPPES record for Natalie Siwula was last updated on July 26, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.