Quick answers
- Which hospitals does William Griffiths work at?
- Medicare's official clinician data lists William Griffiths at 2 hospitals: Emerson Hospital - and Lowell General Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Griffiths see patients?
- Medicare's clinician data lists 6 practice locations, including Concord, MA, Lowell, MA and Waltham, MA. Call before your visit to confirm the address.
- What is William Griffiths's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does William Griffiths accept Medicare assignment?
- Yes. Medicare's clinician data says William Griffiths 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.
- Does William Griffiths offer telehealth?
- Medicare's clinician data says William Griffiths offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for William Griffiths?
- (978) 287-3020, as listed in official Medicare / NPI Registry data.
- What is William Griffiths's NPI number?
- 1841977683. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William Griffiths works
Medicare's Facility Affiliation Data lists William Griffiths at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Emerson Hospital -W Concord, MA · Acute Care Hospital · CCN 220084
- Lowell General HospitalLowell, MA · Acute Care Hospital · CCN 220063
Practice locations
Addresses where William Griffiths is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 133 Old Rd To 9 Acre CorConcord, MA 01742 (978) 287‑3020
- 133 Old Rd To Nine Acre Corner, Mary Beth MisservilleConcord, MA 01742
- 165 Thorndike St, Fl 4Lowell, MA 01852 (978) 955‑9500
- 310 Baker AveConcord, MA 01742
- 43 Foundry Ave, Suite 110Waltham, MA 02453 (781) 693‑3800
Group practices
Medicare enrollment lists William Griffiths as a member of these groups (CMS data updated 2026-10-02).
- Emerson Practice Associates, Inc240 clinicians in the group
- Charles River Community Health, Inc35 clinicians in the group
- Mill City Medical Group Ltd20 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Concord
Clinicians with the same Medicare primary specialty in Concord, MA — not a recommendation.
Clinician information
| Graduation year | 2023 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1841977683 |
| 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