Quick answers
- Which hospitals does Nicholas R. Marks work at?
- Medicare's official clinician data lists Nicholas R. Marks at 1 hospital: Littleton Regional Healthcare. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nicholas R. Marks see patients?
- Medicare's clinician data lists 1 practice location in Littleton, NH. Call before your visit to confirm the address.
- What is Nicholas R. Marks's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Nicholas R. Marks accept Medicare assignment?
- Yes. Medicare's clinician data says Nicholas R. Marks accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Nicholas R. Marks?
- (603) 444-9000, as listed in official Medicare / NPI Registry data.
- What is Nicholas R. Marks's NPI number?
- 1669448650. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nicholas R. Marks works
Medicare's Facility Affiliation Data lists Nicholas R. Marks at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Littleton Regional HealthcareLittleton, NH · Critical Access Hospital · CCN 301302
Practice locations
Addresses where Nicholas R. Marks is enrolled with Medicare (CMS data updated 2026-10-02).
- 600 Saint Johnsbury RdLittleton, NH 03561 (603) 444‑9000
Group practices
Medicare enrollment lists Nicholas R. Marks as a member of this group (CMS data updated 2026-10-02).
- Littleton Hospital Association113 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in New Hampshire
Clinicians with the same Medicare primary specialty in New Hampshire — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Minnesota Medical School |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1669448650 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians