1. Home
  2. Directory
  3. Montana
  4. Big Timber
  5. Physician Assistant
  6. NPI Profile

MS. CHELSEY CLARK PA-C, RDN, CDCES,CLC
NPI 1699172049
Physician Assistant in Big Timber, MT

Active since December 01, 2014PECOS EnrolledAccepts Medicare Assignment
701 STOCK ST, BIG TIMBER, MT 59011(406) 932-4199(406) 932-5490 Get Directions Write a Review

NPPES record last updated: March 11, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 11, 2025, Nov 9, 2023, Dec 1, 2015 (3 updates tracked since 2015).

About Ms. Chelsey Clark Pa-c, Rdn, Cdces,clc NPPES

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

MS. CHELSEY CLARK PA-C, RDN, CDCES,CLC (NPI 1699172049) is an individual physician assistant in Big Timber, Montana and active in the NPI registry since December 2014. She is enrolled in Medicare PECOS, is affiliated with St Vincent Healthcare, and is a graduate of Other (2023).

NPPES Registry Identity

NPI1699172049
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameMS. CHELSEY CLARKCredential: PA-C, RDN, CDCES,CLC
Location Address701 STOCK STBig Timber, MT 59011-8071
Mailing Address301 W 7th AveBig Timber, MT 59011-7695 · (406) 932-4199 · Fax (406) 932-5490
Phone(406) 932-4199
Fax(406) 932-5490
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateDecember 1, 2014
Last NPPES UpdateMarch 11, 20253 updates tracked since enumeration
NPPES CertifiedMarch 11, 2025
✔ NPI 1699172049 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ 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.
Also ListedDietitian, RegisteredTaxonomy 133V00000X · License 21049 (MT)
701 STOCK ST, Big Timber, MT 59011
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans 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

Ms. Chelsey Clark Pa-c, Rdn, Cdces,clc 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 ID2961726070
PECOS Enrollment IDI20231204001014
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 3

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

St Vincent Healthcare

Acute Care Hospitals · Billings, MT
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number270049
Location1233 N 30th StBillings, MT 59101 · Yellowstone County
Emergency services Birthing friendly

Pioneer Medical Center

Critical Access Hospitals · Big Timber, MT
OwnershipVoluntary non-profit - Private
CMS Certification Number271313
Location301 W 7th AveBig Timber, MT 59011 · Sweet Grass County
Emergency services

Livingston Healthcare

Critical Access Hospitals · Livingston, MT
3/5 CMS rating
OwnershipPhysician
CMS Certification Number271317
Location320 Alpenglow LaneLivingston, MT 59047 · Park County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 59011 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
$87.97 typical visit price
range $56.81 – $172.26
Typical copayment $21.99 (range $14.20 – $43.06)
Most-billed visit code 99203
Established Patient
$70.82 typical visit price
range $18.24 – $140.32
Typical copayment $17.70 (range $4.56 – $35.08)
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 2

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

MRS. KELSI RANAE WILSON PT, ATC
Physical Therapist
701 STOCK ST
BIG TIMBER, MT 59011
Sweet Grass County (406) 932-2451
SARAH WALTON FNP
Nurse Practitioner (Family)
701 STOCK ST, SUITE 2
BIG TIMBER, MT 59011
Sweet Grass County (406) 932-4199

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 Chelsey Clark's NPI number?

The NPI number for Chelsey Clark is 1699172049. It was assigned to this individual provider in the NPPES registry on December 1, 2014.

Where is Chelsey Clark located?

Chelsey Clark practices at 701 Stock St, Big Timber, MT 59011. The listed phone number is (406) 932-4199.

What is Chelsey Clark's specialty?

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

Is Chelsey Clark enrolled in Medicare?

Yes. Chelsey Clark 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.

What insurance does Chelsey Clark accept?

Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans and Providence Health Plan list Chelsey Clark 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 Chelsey Clark affiliated with any hospitals?

According to CMS data, Chelsey Clark is affiliated with St Vincent Healthcare, Pioneer Medical Center and Livingston Healthcare.

When was this NPI record last updated?

The NPPES record for Chelsey Clark was last updated on March 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.