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HARRISON AND FELDHAUSEN PC
NPI 1659492494
Clinical Nurse Specialist - Psychiatric/Mental Health in Olney, MD

Active since April 02, 2007
2923 OLNEY SANDY SPRING RD, #E, OLNEY, MD 20832(301) 570-4400 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 11, 2025, Aug 22, 2020 (2 updates tracked since 2020).

About Harrison And Feldhausen Pc NPPES

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

HARRISON AND FELDHAUSEN PC (NPI 1659492494) is a healthcare organization registered as a psychiatric/mental health in Olney, Maryland and active in the NPI registry since April 2007. The organization lists Barbara Ruth Harrison, Vice President, as its authorized official.

NPPES Registry Identity

NPI1659492494
Entity TypeOrganization
Primary Taxonomy364SP0808X
Legal Business NameHARRISON AND FELDHAUSEN PC
Location Address2923 OLNEY SANDY SPRING RD, #EOlney, MD 20832-1528
Mailing Address2923 Olney Sandy Spring Rd, #eOlney, MD 20832-1528 · (301) 570-4400
Phone(301) 570-4400
Organization SubpartNo
Authorized OfficialBarbara Ruth HarrisonVice President · (301) 570-4400
Enumeration DateApril 2, 2007
Last NPPES UpdateSeptember 11, 20252 updates tracked since enumeration
✔ NPI 1659492494 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyClinical Nurse Specialist · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code364SP0808X
Also ListedNurse Practitioner · Psychiatric/Mental HealthTaxonomy 363LP0808X
2923 OLNEY SANDY SPRING RD, Olney, MD 20832
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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Harrison And Feldhausen Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by January 31, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateDistrict of ColumbiaEnrollment IDO20050822000765Non-DME Part B · Clinic/Group PracticeDue dateJanuary 31, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Harrison And Feldhausen PC, which bills Medicare for the services they deliver. Of these, 2 practice within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Roberta Worrall Feldhausen, APRN
Certified Clinical Nurse Specialist (CNS)
NPI 1841222973
3110 GRACEFIELD RD
Silver Spring, MD 20904
(301) 572-8340
✔ PECOS✔ Accepts Medicare9.2 mi
Barbara Harrison, APRN
Certified Clinical Nurse Specialist (CNS)
NPI 1801828082
3110 GRACEFIELD RD
Silver Spring, MD 20904
(301) 572-8340
✔ PECOS✔ Accepts Medicare9.2 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Harrison And Feldhausen PC's NPI number?

The NPI number for Harrison And Feldhausen PC is 1659492494. It was assigned to this organization in the NPPES registry on April 2, 2007.

Where is Harrison And Feldhausen PC located?

Harrison And Feldhausen PC is located at 2923 Olney Sandy Spring Rd #e, Olney, MD 20832. The listed phone number is (301) 570-4400.

What is Harrison And Feldhausen PC's specialty?

The primary specialty registered for this NPI is Clinical Nurse Specialist, specializing in Psychiatric/Mental Health, with taxonomy code 364SP0808X.

Is Harrison And Feldhausen PC enrolled in Medicare?

Yes. Harrison And Feldhausen PC is registered in the Medicare PECOS enrollment system.

When is Harrison And Feldhausen PC's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (District of Columbia, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Harrison And Feldhausen PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Certified Clinical Nurse Specialist (CNS), reassign their Medicare billing to Harrison And Feldhausen PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 2 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Harrison And Feldhausen PC was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.