Nancy Szendy Mark, D.C.
Chiropractor · Riverhead, NY
Nancy Szendy Mark, D.C. is a chiropractor with a practice address in Riverhead, New York, and NPI 1225398860, issued on May 16, 2012. Check the license (New York X007378-1, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nancy Szendy Mark
- Credential
- D.C.
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- X007378-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 633 Roanoke Ave, Riverhead, NY 11901
- Phone
- (631) 727-3795
- Enumerated
- May 16, 2012
- Record last updated
- Mar 10, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20121108000383); accepts Medicare assignment
- Medical or professional school
- Life Chiropractic College, 1993
- Entity
- Type 1 · individual
8 nearest chiropractor records → All 4,573 in New York → Look up another NPI →
Also registered at 633 Roanoke Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Glen Mark, D.C.Chiropractor1669415238
Verify Nancy Szendy Mark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license X007378-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Hallmark ChiropracticRiverhead, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nancy Szendy Mark among 4,573 chiropractor records in New York
Nancy Szendy Mark, D.C. is one of 4,573 chiropractor records with a practice address in New York. 13% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 74% of them.
- NPI issued2012 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 13% of these records are
- In the CMS Doctors and Clinicians fileYes · 36% of these records are
- Graduated1993 · median 1997 among the 1,633 with a school on file
- Record last updated2020 · 79% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 111N00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Chiropractor providers in New York
There are 4,573 chiropractor records in New York.
All 4,573 in New York → Every provider in Riverhead → Chiropractor nationwide →
The 8 chiropractor records with the nearest ZIP codes
- Richard Bogdanski, DCRiverhead, NY 119011003928169
- Brian Bogdanski, DCRiverhead, NY 119011649548215
- Michael BunceRiverhead, NY 119011740993989
- Charles Diggett, D.C.Riverhead, NY 119011477530467
- Karen Dion, D.C.Riverhead, NY 119011588818249
- Alyssa Lloyd, DCRiverhead, NY 119011720595176
- Glen Mark, D.C.Riverhead, NY 119011669415238
- Christopher Nelson, DCRiverhead, NY 119011225273246
Common questions
What is Nancy Szendy Mark, D.C.'s NPI number?
Nancy Szendy Mark, D.C.'s National Provider Identifier (NPI) is 1225398860, issued on May 16, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Szendy Mark, D.C. located?
The NPPES record lists a practice address at 633 Roanoke Ave, Riverhead, NY, 11901. Phone: (631) 727-3795. Providers update this record themselves, so call before visiting.
How can I verify Nancy Szendy Mark, D.C.'s license?
NPPES lists New York license number X007378-1, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.