MARK WILLIAM HUMPHREY SR.
NPI 1770116873
Case Manager/Care Coordinator in Washington, DC

Active since February 17, 2020
35 K ST NE, WASHINGTON, DC 20002(202) 839-3500 Get Directions Write a Review

NPPES record last updated: June 2, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jun 2, 2025, Feb 17, 2020 (2 updates tracked since 2020).

About Mark William Humphrey Sr. NPPES

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

MARK WILLIAM HUMPHREY SR. (NPI 1770116873) is an individual case manager/care coordinator provider in Washington, District Of Columbia and active in the NPI registry since February 2020.

NPPES Registry Identity

NPI1770116873
Entity TypeIndividualMale
Primary Taxonomy171M00000X
Provider Legal NameMARK WILLIAM HUMPHREY SR.
Location Address35 K ST NEWashington, DC 20002-4216
Mailing Address1009 Atlee DrLandover, MD 20785-5966 · (240) 330-0786
Sole ProprietorNo
Enumeration DateFebruary 17, 2020
Last NPPES UpdateJune 2, 20252 updates tracked since enumeration
NPPES CertifiedJune 2, 2025
NPI 1770116873 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyCase Manager/Care CoordinatorOther Service Providers
Taxonomy Code171M00000X
Definition

A person who provides case management services and assists an individual in gaining access to needed medical, social, educational, and/or other services. The person has the ability to provide an assessment and review of completed plan of care on a periodic basis. This person is also able to take collaborative action to coordinate the services with other providers and monitor the enrollee's progress toward the cost-effective achievement of objectives specified in the plan of care. Credentials may vary from an experience in the fields of psychology, social work, rehabilitation, nursing or a closely related human service field, to a related Assoc of Arts Degree or to nursing credentials. Some states may require certification in case management.

Also ListedHome Health AideTaxonomy 374U00000X
35 K ST NE, Washington, DC 20002

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.

Social Worker (Clinical)
35 K ST NE, 2ND FLOOR
WASHINGTON, DC 20002
Counselor
35 K ST NE
WASHINGTON, DC 20002
Counselor (Mental Health)
35 K ST NE
WASHINGTON, DC 20002
Psychiatry & Neurology (Psychiatry)
35 K ST NE
WASHINGTON, DC 20002
Psychiatry & Neurology (Psychiatry)
35 K ST NE
WASHINGTON, DC 20002
Psychiatry & Neurology (Psychiatry)
35 K ST NE
WASHINGTON, DC 20002
Social Worker (Clinical)
35 K ST NE, ROOM 315
WASHINGTON, DC 20002
Registered Nurse (Case Management)
35 K ST NE
WASHINGTON, DC 20002

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1770116873, enumerated as an "individual" on February 17, 2020.

The provider is located at 35 K ST NE WASHINGTON, DC 20002 and the phone number is (202) 839-3500.

Case Manager/Care Coordinator with taxonomy code 171M00000X.