Mark D. Litchman, MD
Listed as an allergist, with 2 practice addresses in Norwalk and Greenwich, Connecticut.
Practice locations 2
Fairfield County Allergy Asthma and Immunology Associates PC
148 E Ave, Suite 3G
Norwalk, CT 06851Fairfield County Allergy Asthma and Immunology Associates PC
2 /2 Dearfield Dr
Greenwich, CT 06831
From the records
- Specialty
- Allergist
- Records
- Medicare records: allergy/immunology (October 2026).
- Medicare
- Accepts the Medicare-approved amount as payment in full (Medicare assignment), according to CMS’s file. This applies to Original Medicare; Medicare Advantage plans have their own networks. What assignment means
- Telehealth
- Medicare’s file shows recent telehealth visits. It doesn’t mean every visit can be by video.
- Medical school
- Rush Medical College of Rush University, graduated 1984 (Medicare records)
- Registry record
- Last updated October 2020
- NPI
- 1447341243 (national provider registry)
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From CMS’s Doctors and Clinicians file (October 2026) and the national provider registry, NPPES (October 2026). Listings are free and in alphabetical order; we don’t rate or recommend doctors. How we list doctors