MR. MARK D RIDDERHOFF LCSW-C
NPI 1437491420
Social Worker - Clinical in Baltimore, MD

Active since March 18, 2013PECOS EnrolledAccepts Medicare Assignment
2050 FOUNTAIN ST, BALTIMORE, MD 21231(443) 980-0019 Get Directions Write a Review

NPPES record last updated: March 29, 2016. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Mr. Mark D Ridderhoff Lcsw-c NPPES

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

MR. MARK D RIDDERHOFF LCSW-C (NPI 1437491420) is an individual clinical provider in Baltimore, Maryland, licensed in Maryland (15927) and active in the NPI registry since March 2013. He is enrolled in Medicare PECOS and is a graduate of Other (2005).

NPPES Registry Identity

NPI1437491420
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameMR. MARK D RIDDERHOFFCredential: LCSW-C
Location Address2050 FOUNTAIN STBaltimore, MD 21231-3029
Mailing Address101 East Pennsylvania AvenueTowson, MD 21286 · (410) 583-2222
Sole ProprietorYes
Medical School CMSOtherGraduated 2005
Enumeration DateMarch 18, 2013
Last NPPES UpdateMarch 29, 2016
NPI 1437491420 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License Licensed in MD · 15927
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
2050 FOUNTAIN ST, Baltimore, MD 21231

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

Mr. Mark D Ridderhoff Lcsw-c 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 ID446498794
PECOS Enrollment IDI20130529000364
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21231 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
$0.00 typical visit price
range $60.73 – $183.44
Typical copayment $0.00 (range $15.18 – $45.86)
Most-billed visit code NA
Established Patient
$75.47 typical visit price
range $19.60 – $149.17
Typical copayment $18.86 (range $4.90 – $37.29)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Ridderhoff's NPI number?

The NPI number for Mark Ridderhoff is 1437491420. It was assigned to this individual provider in the NPPES registry on March 18, 2013.

Where is Mark Ridderhoff located?

Mark Ridderhoff practices at 2050 Fountain St, Baltimore, MD 21231. The listed phone number is (443) 980-0019.

What is Mark Ridderhoff's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Mark Ridderhoff enrolled in Medicare?

Yes. Mark Ridderhoff 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.

When was this NPI record last updated?

The NPPES record for Mark Ridderhoff was last updated on March 29, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years 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.