Margaret Calloway, M.D.
NPI 1881677888 · Infectious Disease Physician · Bethesda, MD
Enrolled with Medicare as Order and Referring Only - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Calloway, M.D. is a Infectious Disease Physician provider in Bethesda, MD (NPI 1881677888).
Provider details
- NPI number
- 1881677888
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- License
- G79915 (CA)
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
20 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
- 2005-11-22
- Last updated
- 2007-07-08
Frequently asked questions
- What is Margaret Calloway's NPI number?
- Margaret Calloway's National Provider Identifier (NPI) is 1881677888, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Calloway's specialty?
- Margaret Calloway is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Calloway located?
- Margaret Calloway's practice location on file with NPPES is 4301 Jones Bridge Rd, Bethesda, MD 20814-4712.
- What is Margaret Calloway's phone number?
- The practice phone number listed in the NPPES registry for Margaret Calloway is (301) 295-1602.
- Does Margaret Calloway accept Medicare?
- Margaret Calloway is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Calloway's NPI active?
- Yes — Margaret Calloway's NPI (1881677888) 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.