Louis Macareo, M.D., J.D., M.P.H.
NPI 1881891323 · Internal Medicine Physician · Silver Spring, MD
Louis Macareo, M.D., J.D., M.P.H. is a Internal Medicine Physician provider in Silver Spring, MD (NPI 1881891323).
Provider details
- NPI number
- 1881891323
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., J.D., M.P.H.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 050219 (GA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
- 2007-06-28
- Last updated
- 2007-07-08
Frequently asked questions
- What is Louis Macareo's NPI number?
- Louis Macareo's National Provider Identifier (NPI) is 1881891323, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Macareo's specialty?
- Louis Macareo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Louis Macareo located?
- Louis Macareo's practice location on file with NPPES is Wrair Division of Experimental Therapeutics, Silver Spring, MD 20910-7500.
- What is Louis Macareo's phone number?
- The practice phone number listed in the NPPES registry for Louis Macareo is (301) 319-9412.
- Is Louis Macareo's NPI active?
- Yes — Louis Macareo's NPI (1881891323) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.