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DR. MARK MAZER MD
NPI 1427577105
Psychiatry & Neurology - Psychiatry in Baltimore, MD

Active since September 14, 2017PECOS Enrolled
701 W PRATT ST FL 2, BALTIMORE, MD 21201(410) 328-6018(410) 328-6391 Get Directions Write a Review

NPPES record last updated: August 8, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 8, 2025, Jul 12, 2023, Apr 20, 2019 and 1 more (4 updates tracked since 2017).

About Dr. Mark Mazer Md NPPES

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

DR. MARK MAZER MD (NPI 1427577105) is an individual psychiatry provider in Baltimore, Maryland, licensed in Maryland (D0097631) and active in the NPI registry since September 2017. He is enrolled in Medicare PECOS and maintains a secondary practice location in Baltimore.

NPPES Registry Identity

NPI1427577105
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. MARK MAZERCredential: MD
Location Address701 W PRATT ST FL 2Baltimore, MD 21201-1023
Mailing Address701 W Pratt St Fl 2Baltimore, MD 21201-1023
Phone(410) 328-6018
Fax(410) 328-6391
Sole ProprietorNo
Enumeration DateSeptember 14, 2017
Last NPPES UpdateAugust 8, 20254 updates tracked since enumeration
NPPES CertifiedAugust 8, 2025
✔ NPI 1427577105 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in MD · D0097631
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
Also ListedPsychiatry & Neurology · Child & Adolescent PsychiatryTaxonomy 2084P0804X · License D0097631 (MD)
701 W PRATT ST FL 2, Baltimore, MD 21201
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Secondary Practice Location 1

Location 122 S Greene StBaltimore, MD 21201-1590 · Phone (410) 328-6018 · Fax (410) 328-6391

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark Mazer Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

Medicare enrollment records show Mark Mazer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Maryland Psychiatry Associates, PA
Same address
Psychiatry
701 W PRATT ST FL 4
Baltimore, MD 21201
  • Reassigned Medicare billing, Maryland enrollment
  • 89 clinicians in this Medicare group
NPI 1649292699 (410) 328-5881

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21201 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
$183.44 typical visit price
range $60.73 – $183.44
Typical copayment $45.86 (range $15.18 – $45.86)
Most-billed visit code 99205
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.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MARK KVARTA MD, PHD
Psychiatry & Neurology (Psychiatry)
701 W PRATT ST FL 2
BALTIMORE, MD 21201
Baltimore City (410) 328-6325
DR. AIJAH KAI BARUTI-GOODWIN PHD
Psychologist
701 W PRATT ST FL 2
BALTIMORE, MD 21201
Baltimore City (410) 328-6018
CAROLINE WILEY QUAGLIERI MD
Psychiatry & Neurology (Psychiatry)
701 W PRATT ST FL 2
BALTIMORE, MD 21201
Baltimore City (410) 328-2207
JACOB SCHARER M.A.
Psychologist
701 W PRATT ST FL 2
BALTIMORE, MD 21201
Baltimore City (410) 328-6018
DR. LAURA ANDERSON PHD
Psychologist (Counseling)
701 W PRATT ST FL 2, UNIV OF MARYLAND ADULT OUTPATIENT PSYCHIATRY
BALTIMORE, MD 21201
Baltimore City (410) 328-6018

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 Mazer's NPI number?

The NPI number for Mark Mazer is 1427577105. It was assigned to this individual provider in the NPPES registry on September 14, 2017.

Where is Mark Mazer located?

Mark Mazer practices at 701 W Pratt St Fl 2, Baltimore, MD 21201. The listed phone number is (410) 328-6018.

What is Mark Mazer's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Mark Mazer enrolled in Medicare?

Yes. Mark Mazer is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mark Mazer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Mazer reassigns Medicare benefits to University Of Maryland Psychiatry Associates, PA (Baltimore, MD). The 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 Mark Mazer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mark Mazer was last updated on August 8, 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.