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CASSANDRA MUELLER PA-C
NPI 1205251816
Physician Assistant in Washington, DC

Active since February 19, 2014PECOS EnrolledAccepts Medicare Assignment
92.93/100
CMS Quality Rating
2401 E ST NW SA-1 SUITE L201, WASHINGTON, DC 20522(571) 438-1383 Get Directions Write a Review

NPPES record last updated: March 17, 2025. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Mar 17, 2025, Nov 6, 2019 (2 updates tracked since 2019).

About Cassandra Mueller Pa-c NPPES

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

CASSANDRA MUELLER PA-C (NPI 1205251816) is an individual physician assistant in Washington, District Of Columbia, licensed in District Of Columbia (PA200002057) and active in the NPI registry since February 2014. She is enrolled in Medicare PECOS, is affiliated with Inova Loudoun Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1205251816
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameCASSANDRA MUELLERCredential: PA-C
Location Address2401 E ST NW SA-1 SUITE L201Washington, DC 20522-0001
Mailing Address805 Sandy Plains Road, Medical Staff ServicesMarietta, GA 30066-6340
Phone(571) 438-1383
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateFebruary 19, 2014
Last NPPES UpdateMarch 17, 20252 updates tracked since enumeration
NPPES CertifiedMarch 17, 2025
✔ NPI 1205251816 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
License✔ Licensed in DC · PA200002057
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 ListedPhysician Assistant · SurgicalTaxonomy 363AS0400X · License 0110007636 (VA)
2401 E ST NW SA-1 SUITE L201, Washington, DC 20522
Open in Google Maps ↗

Secondary Practice Locations 3

Location 155 Whitcher St NE Ste 130Marietta, GA 30060 · Phone (770) 426-1629
Location 26621 Fannin St, MC 1-1410Houston, TX 77030-2303 · Phone (832) 822-0640
Location 344055 Riverside PkwyLeesburg, VA 20176-5179 · Phone (703) 858-6000

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

Cassandra Mueller 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 ID8729330923
PECOS Enrollment IDI20250108004287
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.

Inova Loudoun Hospital

Acute Care Hospitals · Leesburg, VA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490043
Location44045 Riverside ParkwayLeesburg, VA 20176 · Loudoun County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20522 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
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$80.66 typical visit price
range $21.40 – $158.88
Typical copayment $20.16 (range $5.35 – $39.72)
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.

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.

92.93/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality80.38
Promoting Interoperability100
Improvement Activities40

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 Cassandra Mueller's NPI number?

The NPI number for Cassandra Mueller is 1205251816. It was assigned to this individual provider in the NPPES registry on February 19, 2014.

Where is Cassandra Mueller located?

Cassandra Mueller practices at 2401 E St NW Sa-1 Suite L201, Washington, DC 20522. The listed phone number is (571) 438-1383.

What is Cassandra Mueller's specialty?

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

Is Cassandra Mueller enrolled in Medicare?

Yes. Cassandra Mueller 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 Cassandra Mueller affiliated with any hospitals?

According to CMS data, Cassandra Mueller is affiliated with Inova Loudoun Hospital.

When was this NPI record last updated?

The NPPES record for Cassandra Mueller was last updated on March 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.