Quick answers
- Does Matthew A. Krzystyniak accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew A. Krzystyniak accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Matthew A. Krzystyniak's NPI number?
- 1902785470. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Matthew A. Krzystyniak works
Medicare's Facility Affiliation Data lists Matthew A. Krzystyniak at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Emerson Hospital -W Concord, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220084
Practice locations
Addresses where Matthew A. Krzystyniak is enrolled with Medicare (CMS data updated October 2, 2026).
- 133 Old Rd To 9 Acre CorConcord, MA 01742 (978) 287‑3020
- 133 Old Rd To Nine Acre Corner, Mary Beth MisservilleConcord, MA 01742
Group practices
Medicare enrollment lists Matthew A. Krzystyniak as a member of this group (CMS data updated October 2, 2026).
- Emerson Practice Associates, Inc240 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.
Other clinicians in Emerson Practice Associates, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2025 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1902785470 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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