Katie Mattila, NP
NPI 1124891858 · Nurse Practitioner · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katie Mattila, NP is a Nurse Practitioner provider in Grand Rapids, MI (NPI 1124891858).
Provider details
- NPI number
- 1124891858
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 204623 (ND)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
2 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
28 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 28 | $95 |
Typical Medicare-allowed amounts for these services range $95–$95 (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 (2)
- 200 1st St SwRochester, MN 55905-0001Phone: (507) 284-2511
- 4820 23rd Ave SFargo, ND 58104-9137Phone: (469) 677-7430
Registry dates
- Enumerated
- 2023-11-03
- Last updated
- 2026-05-29
- Certified
- 2026-05-29
Frequently asked questions
- What is Katie Mattila's NPI number?
- Katie Mattila's National Provider Identifier (NPI) is 1124891858, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katie Mattila's specialty?
- Katie Mattila is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Katie Mattila located?
- Katie Mattila's practice location on file with NPPES is 790 Fuller Ave Ne, Grand Rapids, MI 49503-1918.
- What is Katie Mattila's phone number?
- The practice phone number listed in the NPPES registry for Katie Mattila is (616) 336-3909.
- Does Katie Mattila accept Medicare?
- Katie Mattila is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katie Mattila's NPI active?
- Yes — Katie Mattila's NPI (1124891858) is active in the NPPES registry as of the last update on 2026-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.