Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mark D Litchman, MD

Individual provider Allergy & Immunology Physician · NPI 1447341243

Mark D Litchman, MD is an Allergy/Immunology in Norwalk, Connecticut. Graduated from Rush Medical College of Rush University in 1984, 42 years ago. Practices with Fairfield County Allergy Asthma and Immunology Associates PC, a 4-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Connecticut.

Years since qualifying
42
Trained at
Rush Medical College of Rush University
Licensed in
CT
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

148 E Ave Ste 3G
Norwalk, CT 06851
Phone: (203) 838-4034
Fax: (203) 853-6361
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy & Immunology Physician (primary) Taxonomy 207K00000X · Licence 027828 (CT)

Record details

NPI number1447341243
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 27, 2006
Last updated in NPPESOctober 8, 2020
Certification dateOctober 8, 2020
Mailing address148 East Avenue, Suite 3g, Norwalk, CT 06851

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyALLERGY/IMMUNOLOGY
Medical schoolRUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Graduated 1984 (42 years in practice)
Group practice Fairfield County Allergy Asthma And Immunology Associates Pc — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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