Quick answers
- Which hospitals does John M. Riddell work at?
- Medicare's official clinician data lists John M. Riddell at 1 hospital: Parkland Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John M. Riddell see patients?
- Medicare's clinician data lists 4 practice locations, including Derry, NH, Manchester, NH and Nashua, NH. Call before your visit to confirm the address.
- What is John M. Riddell's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does John M. Riddell accept Medicare assignment?
- Medicare's clinician data says John M. Riddell may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for John M. Riddell?
- (603) 432-1500, as listed in official Medicare / NPI Registry data.
- What is John M. Riddell's NPI number?
- 1174593073. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John M. Riddell works
Medicare's Facility Affiliation Data lists John M. Riddell at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Parkland Medical CenterDerry, NH · Acute Care Hospital · CCN 300017
Practice locations
Addresses where John M. Riddell is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Parkland DrDerry, NH 03038 (603) 432‑1500
- 100 Hitchcock WayManchester, NH 03104 (603) 695‑2500
- 2300 Southwood DrNashua, NH 03063 (603) 577‑4070
- 310 Baker Ave, Suite 175aConcord, MA 01742 (978) 776‑1710
Group practices
Medicare enrollment lists John M. Riddell as a member of these groups (CMS data updated 2026-10-02).
- Dartmouth-Hitchcock Clinic1,472 clinicians in the group
- Anesthesia Associates of New England PC15 clinicians in the group
- Emerson Endoscopy and Digestive Health Center, LLC12 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Derry
Clinicians with the same Medicare primary specialty in Derry, NH — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1174593073 |
| 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