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

Marc Allen, DO

Individual provider Internal Medicine Physician · NPI 1356309892

Marc Allen, DO is an Internal Medicine in Commack, New York. Qualified in 1999, 27 years ago. Practices with Dr Marc Allen Medical PC, a 6-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
27
Licensed in
NY
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

358 Veterans Memorial Hwy Ste 11
Commack, NY 11725
Phone: (631) 543-8844
Fax: (631) 543-8840
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2238341 (NY)

Record details

NPI number1356309892
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 3, 2006
Last updated in NPPESJuly 13, 2026
Mailing address1045 W Jericho Tpke, Ste 11, Smithtown, NY 11787-3205

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Group practice Dr Marc Allen Medical Pc — 6 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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