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

MS. CHRISTINA JOY WALKER CRNP
NPI 1003382433
Nurse Practitioner - Adult Health in Fort Washington, MD

Active since October 24, 2018PECOS Enrolled
8507 OXON HILL RD STE 200, FORT WASHINGTON, MD 20744(301) 841-6868(301) 841-6885 Get Directions Write a Review

NPPES record last updated: July 21, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 21, 2026, Aug 16, 2024, Oct 24, 2018 (3 updates tracked since 2018).

About Ms. Christina Joy Walker Crnp NPPES

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

MS. CHRISTINA JOY WALKER CRNP (NPI 1003382433) is an individual adult health provider in Fort Washington, Maryland, licensed in Maryland (R235436) and active in the NPI registry since October 2018. She is enrolled in Medicare PECOS, is affiliated with Holy Cross Hospital, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1003382433
Entity TypeIndividualFemale
Primary Taxonomy363LA2200X
Provider Legal NameMS. CHRISTINA JOY WALKERCredential: CRNP
Location Address8507 OXON HILL RD STE 200Fort Washington, MD 20744-4774
Mailing Address8507 Oxon Hill Rd Ste 200Fort Washington, MD 20744-4774 · (301) 841-6868 · Fax (301) 841-6885
Fax(301) 841-6885
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateOctober 24, 2018
Last NPPES UpdateJuly 21, 20263 updates tracked since enumeration
NPPES CertifiedJuly 21, 2026
NPI 1003382433 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyNurse Practitioner · Adult HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2200X
License Licensed in MD · R235436
8507 OXON HILL RD STE 200, Fort Washington, MD 20744

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. Christina Joy Walker Crnp 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 ID3476893892
PECOS Enrollment IDI20190826001346
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.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
154 services149 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
98 services78 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
48 services48 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
33 services26 patients

Hospital Affiliations CMS Care Compare 3

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

Holy Cross Hospital

Acute Care Hospitals · Silver Spring, MD
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number210004
Location1500 Forest Glen RoadSilver Spring, MD 20910 · Montgomery County
Birthing friendly

Luminis Health Doctors Community Medical Ctr, Inc

Acute Care Hospitals · Lanham, MD
2/5 CMS rating
OwnershipProprietary
CMS Certification Number210051
Location8118 Good Luck RoadLanham, MD 20706 · Prince Georges County
Emergency services

Holy Cross Germantown Hospital

Acute Care Hospitals · Germantown, MD
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210065
Location19801 Observation DriveGermantown, MD 20876 · Montgomery County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20744 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
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
Most-billed visit code 99214
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 2

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
3 suppliers24 claims24 services$14.10 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
3 suppliers24 claims24 services$65.89 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.

Counselor (Mental Health)
8507 OXON HILL RD STE 200
FORT WASHINGTON, MD 20744
Nurse Practitioner (Psychiatric/Mental Health)
8507 OXON HILL RD STE 200
FORT WASHINGTON, MD 20744
Nurse Practitioner (Psychiatric/Mental Health)
8507 OXON HILL RD STE 200
FORT WASHINGTON, MD 20744
Social Worker (Clinical)
8507 OXON HILL RD STE 200
FORT WASHINGTON, MD 20744
Home Health
8507 OXON HILL RD STE 200
FORT WASHINGTON, MD 20744
Nurse Practitioner (Psychiatric/Mental Health)
8507 OXON HILL RD STE 200
FORT WASHINGTON, MD 20744
Counselor (Professional)
8507 OXON HILL RD STE 200
FORT WASHINGTON, MD 20744
Nurse Practitioner (Psychiatric/Mental Health)
8507 OXON HILL RD STE 200
FORT WASHINGTON, MD 20744

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 Christina Walker's NPI number?

The NPI number for Christina Walker is 1003382433. It was assigned to this individual provider in the NPPES registry on October 24, 2018.

Where is Christina Walker located?

Christina Walker practices at 8507 Oxon Hill Rd Ste 200, Fort Washington, MD 20744. The listed phone number is (301) 841-6868.

What is Christina Walker's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

Is Christina Walker enrolled in Medicare?

Yes. Christina Walker 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 Christina Walker affiliated with any hospitals?

According to CMS data, Christina Walker is affiliated with Holy Cross Hospital, Luminis Health Doctors Community Medical Ctr, Inc and Holy Cross Germantown Hospital.

When was this NPI record last updated?

The NPPES record for Christina Walker was last updated on July 21, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.