CHELSEA LYNN HAMERSHOCK PA-C
NPI 1265801435
Physician Assistant in Baltimore, MD
NPI Status: Active since September 17, 2015
Contact Information
1800 ORLEANS ST
BALTIMORE, MD
ZIP 21287
Phone: (410) 955-5000
- Individual
- Female
- Physician Assistant
- PECOS Enrolled
About CHELSEA HAMERSHOCK
This page provides the complete NPI Profile along with additional information for Chelsea Hamershock, a primary care provider established in Baltimore, Maryland with a medical specialization in Physician Assistant. The healthcare provider is registered in the NPI registry with number 1265801435 assigned on September 2015. The practitioner's primary taxonomy code is 363A00000X with license number C0005907 (MD). The provider is registered as an individual and her NPI record was last updated May 2025.
- NPI
- 1265801435
- Provider Name
- CHELSEA LYNN HAMERSHOCK PA-C
- Other Name
- CHELSEA LYNN STEWART PA-C
- Other Name Type
- Former Name (1)
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 1800 ORLEANS ST BALTIMORE, MD 21287
- Location Phone
- (410) 955-5000
- Mailing Address
- 7726 MCCLELLAN AVE BOONSBORO, MD 21713
- Mailing Phone
- (610) 417-1907
- Is Sole Proprietor?
- No
- Enumeration Date
- 09-17-2015
- Last Update Date
- 05-28-2025
- Code Navigator
A primary care provider (PCP) like Chelsea Hamershock sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc .
Location Map
Secondary Locations
- 1415 S Mountain Rd Ste 100
Joppa, MD 21085
(410) 918-0777 - 9114 Philadelphia Rd Ste 106
Baltimore, MD 21237
(410) 918-0777
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Physician Assistant
- Taxonomy Code
- 363A00000X
- Type
- Physician Assistants & Advanced Practice Nursing Providers
- License No.
- C0005907
- License State
- MD
- Taxonomy Description
- 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.
Medicare Participation & PECOS Enrollment Status
Chelsea Hamershock is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes
Provider Referred Orders for Durable Medical Equipment, Devices & Supplies
The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.
Durable Medical Equipment
DME-Oxygen and Supplies (DC000N)
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing (HCPCS:E0431)
1 DME suppliers used 12 Medicare Claims 12 Services Paid
DME-Oxygen and Supplies (DC002N)
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate (HCPCS:E1390)
1 DME suppliers used 18 Medicare Claims 18 Services Paid
DME-Other DME (DE017N)
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service (HCPCS:K0553)
1 DME suppliers used 11 Medicare Claims 11 Services Paid
Areas of Expertise
The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.
Automated urinalysis test
Established patient office or other outpatient visit, 30-39 minutes
New patient office or other outpatient visit, 30-44 minutes
An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.
This service was performed 17 times for 17 patientsThis is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
This service was performed 71 times for 68 patientsThis service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
This service was performed 52 times for 52 patientsPhysician Visit Costs
The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.
For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.
The prices below reflect the costs for new and established patients in the 21287 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99203
- Average New Patient Price $94.08
- Minimum New Patient Price $60.73
- Maximum New Patient Price $183.44
- Average New Patient Copayment $23.52
- Minimum New Patient Copayment $15.18
- Maximum New Patient Copayment $45.86
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99213
- Average Established Patient Price $75.47
- Minimum Established Patient Price $19.6
- Maximum Established Patient Price $149.17
- Average Established Patient Copayment $18.86
- Minimum Established Patient Copayment $4.9
- Maximum Established Patient Copayment $37.29
* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.
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NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
| Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
| 1 | 2 | 6 | 5 | 8 | 0 | 1 | 4 | 3 | 5 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 2 | 12 | 5 | 16 | 0 | 2 | 4 | 6 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 2 + 1 + 2 + 5 + 1 + 6 + 0 + 2 + 4 + 6 + 24 = 55 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 60 - 55 = 5 | 5 | ||||||||
The NPI number 1265801435 is valid because the calculated check digit 5 using the Luhn validation algorithm matches the last digit of the original NPI number.
Other Providers at the Same Location
The following 20 providers are registered at the same or nearby location.
| NPI | Name / Type | Taxonomy | Address |
|---|---|---|---|
| 1972861383 | MRS. ANGELA JEAN POLTRACK CRNP Individual | Nurse Practitioner (Acute Care) | 1800 ORLEANS ST JOHNS HOPKINS HOSPITAL - CVSICU BALTIMORE, MD 21287 (410) 955-4826 |
| 1023370673 | MRS. KIMBERLY ALICE RICE CPNP Individual | Nurse Practitioner (Pediatrics) | 1800 ORLEANS ST BALTIMORE, MD 21287 (410) 955-5255 |
| 1861700288 | RANJIT A VARGHESE MBBS, MS, MHSC Individual | Orthopaedic Surgery (Pediatric Orthopaedic Surgery) | 1800 ORLEANS ST 3110N-7359B-D3 BALTIMORE, MD 21287 (410) 955-9216 |
| 1821349093 | DR. KHALED MOHSEN AL-OMAR M.B.B.S. Individual | Student in an Organized Health Care Education/Training Program | 1800 ORLEANS ST BALTIMORE, MD 21287 (443) 963-8474 |
| 1447353420 | AMYNA HUSAIN D.O. Individual | Pediatrics (Pediatric Emergency Medicine) | 1800 ORLEANS ST G1514 BALTIMORE, MD 21287 (410) 955-6146 |
| 1942480728 | DEKEA LITZENDORF PA Individual | Physician Assistant (Surgical) | 1800 ORLEANS ST BALTIMORE, MD 21287 (410) 955-2800 |
| 1609013598 | NANCIANN L KEAN CRNA Individual | Nurse Anesthetist, Certified Registered | 1800 ORLEANS ST ACCM- C/O JUANITA TAYLOR BALTIMORE, MD 21287 (443) 465-3817 |
| 1558606970 | KIMBERLEE BRIANNE CURTISS LCSW-C Individual | Social Worker (Clinical) | 1800 ORLEANS ST BALTIMORE, MD 21287 (410) 502-2958 |
| 1164476438 | ELIZABETH A. HENDRICKS C.R.N.P. Individual | Nurse Practitioner | 1800 ORLEANS ST BLOOMBERG 7218 BALTIMORE, MD 21287 (410) 955-2883 |
| 1407894793 | MRS. DEBORAH E. ARNOLD SMITH CRNP Individual | Nurse Practitioner (Family) | 1800 ORLEANS ST BLOOMBERG 7218 BALTIMORE, MD 21287 (410) 502-4937 |
| 1841537255 | JOHNS HOPKINS HOSPITAL Organization | General Acute Care Hospital (Children) | 1800 ORLEANS ST BALTIMORE, MD 21287 (410) 502-2958 |
| 1760729438 | ELSIE W ZIMMERMAN MSN, NNP, B-C Individual | Nurse Practitioner (Neonatal) | 1800 ORLEANS ST SUITE 8391 BALTIMORE, MD 21287 (410) 955-5255 |
| 1134362999 | DR. SEAN PHILIP HEFFERNAN MD Individual | Psychiatry & Neurology (Psychiatry) | 1800 ORLEANS ST MEYER 1-104 BALTIMORE, MD 21287 (443) 519-6566 |
| 1588906473 | MRS. ALISON R EBERLE CRNP Individual | Nurse Practitioner (Acute Care) | 1800 ORLEANS ST BALTIMORE, MD 21287 (410) 955-5570 |
| 1871531947 | SUJATHA KANNAN MD Individual | Pediatrics (Pediatric Critical Care Medicine) | 1800 ORLEANS ST BLOOMBERG CC 6321 BALTIMORE, MD 21287 (410) 955-6412 |
| 1477872752 | JENNIFER STANSBURY ACNP Individual | Nurse Practitioner (Acute Care) | 1800 ORLEANS ST BALTIMORE, MD 21287 (410) 502-1048 |
| 1962723189 | DR. CARA RABIK M.D., PH.D. Individual | Pediatrics (Pediatric Hematology-Oncology) | 1800 ORLEANS ST THE BLOOMBERG CHILDRENS CENTER RM 11379 BALTIMORE, MD 21287 (410) 614-5055 |
| 1639514433 | CHELSEA KUI MCGURRIN WERNSDORFER CRNP Individual | Nurse Practitioner (Acute Care) | 1800 ORLEANS ST BALTIMORE, MD 21287 (410) 955-5000 |
| 1619313806 | RAYMOND CHEONG Individual | Student in an Organized Health Care Education/Training Program | 1800 ORLEANS ST BALTIMORE, MD 21287 (410) 955-5000 |
| 1801233291 | MRS. JULIE ELIZABETH WILLIAMS NP Individual | Nurse Practitioner (Neonatal) | 1800 ORLEANS ST NEONATAL ICU BLOOMBERG 8 BALTIMORE, MD 21287 (410) 955-5255 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1265801435, enumerated in the NPI registry as an "individual" on September 17, 2015
The provider is located at 1800 Orleans St Baltimore, Md 21287 and the phone number is (410) 955-5000
The provider's speciality is Physician Assistant with taxonomy code 363A00000X
Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
Medicare beneficiaries should expect a typical cost of $94.08 with an average copayment of $23.52 for new patient appointments. Established patients should expect a typical charge of $75.47 and an average copayment of 18.86. Please review your insurance plan or contact the provider directly to determine your specific costs.
The most common procedures or services performed by this practitioner are: Automated urinalysis test, Established patient office or other outpatient visit, 30-39 minutes and New patient office or other outpatient visit, 30-44 minutes.
This NPI record was last updated on September 17, 2015. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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