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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: August 23, 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
Phone(202) 839-3500
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
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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.

ETHEL NGOMBA
Registered Nurse
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 839-3500
TOSHA ADRIAN CORNISH RN
Registered Nurse (General Practice)
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 375-4440
ANGELA SYDNOR
Case Manager/Care Coordinator
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (301) 792-8935
HECTOR EDUARDO OBREGON
Counselor (Mental Health)
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 673-6495
MR. ANTONIO J FREEMAN JR.
Case Manager/Care Coordinator
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 839-3500
KARON EUBANKS
Case Manager/Care Coordinator
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 839-3500
MICHAEL CHINYEAKA NWACHUKWU
Case Manager/Care Coordinator
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 839-3500
SYLVIA E JEFFERSON LICSW
Social Worker (Clinical)
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 442-4190

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 Mark Humphrey's NPI number?

The NPI number for Mark Humphrey is 1770116873. It was assigned to this individual provider in the NPPES registry on February 17, 2020.

Where is Mark Humphrey located?

Mark Humphrey practices at 35 K St NE, Washington, DC 20002. The listed phone number is (202) 839-3500.

What is Mark Humphrey's specialty?

The primary specialty registered for this NPI is Case Manager/Care Coordinator with taxonomy code 171M00000X.

When was this NPI record last updated?

The NPPES record for Mark Humphrey was last updated on June 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.