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

Steven Grainer, DO

Individual provider Cardiovascular Disease Physician · NPI 1861441800

Steven Grainer, DO is a Cardiovascular Disease (Cardiology) in Seaford, New York. Qualified in 1985, 41 years ago. Practices with Northwell Healthcare Inc, a 17-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
41
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.

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Practice location Address checks out

850 Hicksville Rd Ste 104
Seaford, NY 11783-1300
Phone: (516) 798-0141
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 170159 (NY)

Record details

NPI number1861441800
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 8, 2006
Last updated in NPPESJune 9, 2015
Mailing address850 Hicksville Rd Ste 104, Seaford, NY 11783-1300

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1985 (41 years in practice)
Group practice Northwell Healthcare Inc — 17 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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