Mark Heuser, M.D.
NPI 1134375637 · Geriatric Medicine (Internal Medicine) Physician · Baltimore, MD
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Heuser, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider in Baltimore, MD (NPI 1134375637).
Provider details
- NPI number
- 1134375637
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 32512 (NC)
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
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2008-08-15
- Last updated
- 2008-08-15
Frequently asked questions
- What is Mark Heuser's NPI number?
- Mark Heuser's National Provider Identifier (NPI) is 1134375637, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Heuser's specialty?
- Mark Heuser is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Heuser located?
- Mark Heuser's practice location on file with NPPES is 10 N Greene St, Baltimore, MD 21201-1524.
- What is Mark Heuser's phone number?
- The practice phone number listed in the NPPES registry for Mark Heuser is (410) 642-2411.
- Does Mark Heuser accept Medicare?
- Mark Heuser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Heuser's NPI active?
- Yes — Mark Heuser's NPI (1134375637) is active in the NPPES registry as of the last update on 2008-08-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.