Mikayla Grassia, PA-C
NPI 1265145593 · Physician Assistant · Manchester, NH
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mikayla Grassia, PA-C is a Physician Assistant provider in Manchester, NH (NPI 1265145593).
Provider details
- NPI number
- 1265145593
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
3 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
50 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 27 | $109 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 23 | $142 |
Typical Medicare-allowed amounts for these services range $109–$142 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 1260 Elm StManchester, NH 03101-1305Phone: (603) 641-0900
Registry dates
- Enumerated
- 2023-01-02
- Last updated
- 2024-02-21
- Certified
- 2024-02-21
Frequently asked questions
- What is Mikayla Grassia's NPI number?
- Mikayla Grassia's National Provider Identifier (NPI) is 1265145593, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mikayla Grassia's specialty?
- Mikayla Grassia is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mikayla Grassia located?
- Mikayla Grassia's practice location on file with NPPES is 738 Hooksett Rd, Manchester, NH 03104-2617.
- What is Mikayla Grassia's phone number?
- The practice phone number listed in the NPPES registry for Mikayla Grassia is (603) 384-3900.
- Does Mikayla Grassia accept Medicare?
- Mikayla Grassia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mikayla Grassia's NPI active?
- Yes — Mikayla Grassia's NPI (1265145593) is active in the NPPES registry as of the last update on 2024-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.