CHELSEA LYNN HAMERSHOCK PA-C
NPI 1265801435
Physician Assistant in Baltimore, MD

Q: What is Chelsea Hamershock's NPI number?

The NPI number for Chelsea Hamershock is 1265801435. It was assigned to this individual provider in the NPPES registry on September 17, 2015. The provider is also known as Chelsea Lynn Stewart Pa-C.

Q: What is Chelsea Hamershock's specialty?

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

Active since September 17, 2015PECOS Enrolled

1800 ORLEANS ST, BALTIMORE, MD 21287(410) 955-5000 Get Directions Write a Review

NPPES record last updated: March 9, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 9, 2026, May 28, 2025, Nov 28, 2018 and 1 more (4 updates tracked since 2016).

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About Chelsea Lynn Hamershock Pa-c NPPES

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

CHELSEA LYNN HAMERSHOCK PA-C (NPI 1265801435) is an individual physician assistant in Baltimore, Maryland, licensed in Maryland (C0005907) and active in the NPI registry since September 2015. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1265801435

Entity TypeIndividualFemale

Primary Taxonomy363A00000X

Provider Legal NameCHELSEA LYNN HAMERSHOCKCredential: PA-C

Location Address1800 ORLEANS STBaltimore, MD 21287-0010

Mailing Address6201 Greenleigh AveMiddle River, MD 21220-2004 · (410) 933-6423

Phone(410) 955-5000

Sole ProprietorNo

Enumeration DateSeptember 17, 2015

Last NPPES UpdateMarch 9, 20264 updates tracked since enumeration

NPPES CertifiedMarch 9, 2026

✔ NPI 1265801435 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363A00000X

License✔ Licensed in MD · C0005907

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.

1800 ORLEANS ST, Baltimore, MD 21287

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Other Names 1

Former Name (1)Chelsea Lynn Stewart Pa-c

Secondary Practice Locations 2

Location 19114 Philadelphia Rd, Ste 106Baltimore, MD 21237-4345 · Phone (410) 918-0777

Location 21415 S Mountain Rd Ste 100Joppa, MD 21085-3236 · Phone (410) 918-0777 ext. 1628 · Fax (410) 369-1705

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Chelsea Lynn Hamershock Pa-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21287 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

$94.08 typical visit price

range $60.73 – $183.44

Typical copayment $23.52 (range $15.18 – $45.86)

Most-billed visit code 99203

Established Patient

$75.47 typical visit price

range $19.60 – $149.17

Typical copayment $18.86 (range $4.90 – $37.29)

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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

1 supplier12 claims12 services$14.01 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

1 supplier18 claims18 services$68.39 avg. paid by Medicare

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553

DME-Other DME · category DE017N

1 supplier11 claims11 services$198.85 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

KATHRYN ROSENBLATT M.D.

Anesthesiology