Mark Mazer, MD
NPI 1427577105 · Psychiatry Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Mazer, MD is a Psychiatry Physician provider in Baltimore, MD (NPI 1427577105).
Provider details
- NPI number
- 1427577105
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D0097631 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 22 S Greene StBaltimore, MD 21201-1590Phone: (410) 328-6018Fax: (410) 328-6391
Registry dates
- Enumerated
- 2017-09-14
- Last updated
- 2025-08-08
- Certified
- 2025-08-08
Frequently asked questions
- What is Mark Mazer's NPI number?
- Mark Mazer's National Provider Identifier (NPI) is 1427577105, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Mazer's specialty?
- Mark Mazer is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Mazer located?
- Mark Mazer's practice location on file with NPPES is 701 W Pratt St Fl 2, Baltimore, MD 21201-1023.
- What is Mark Mazer's phone number?
- The practice phone number listed in the NPPES registry for Mark Mazer is (410) 328-6018.
- Does Mark Mazer accept Medicare?
- Mark Mazer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Mazer's NPI active?
- Yes — Mark Mazer's NPI (1427577105) is active in the NPPES registry as of the last update on 2025-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.