Diana Mackensen, FNP-C
NPI 1629575329 · Family Nurse Practitioner · Willoughby, OH
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Mackensen, FNP-C is a Family Nurse Practitioner provider in Willoughby, OH (NPI 1629575329).
Provider details
- NPI number
- 1629575329
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- APRN.CNP.021979 (OH)
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
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,192 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 35 Minutes99232 | 958 | $63 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 234 | $105 |
Typical Medicare-allowed amounts for these services range $63–$105 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| 0.9 % Sodium Chloridebrand: Sodium Chloride | 28 | — |
| Ampicillin Sod/Sulbactam Sodbrand: Ampicillin-Sulbactam | 21 | — |
| Vancomycin Hcl | 20 | — |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 17 | 17 |
| Piperacillin Sodium/Tazobactambrand: Piperacillin-Tazobactam | 16 | — |
| Ceftriaxone Sodiumbrand: Ceftriaxone | 11 | — |
Practice location
Mailing address
Additional practice locations (1)
- 7590 Auburn RdPainesville, OH 44077-9176Phone: (440) 375-8100
Registry dates
- Enumerated
- 2018-04-09
- Last updated
- 2018-04-09
Frequently asked questions
- What is Diana Mackensen's NPI number?
- Diana Mackensen's National Provider Identifier (NPI) is 1629575329, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Mackensen's specialty?
- Diana Mackensen is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Diana Mackensen located?
- Diana Mackensen's practice location on file with NPPES is 36060 Euclid Ave, Willoughby, OH 44094-4656.
- What is Diana Mackensen's phone number?
- The practice phone number listed in the NPPES registry for Diana Mackensen is (440) 953-9600.
- Does Diana Mackensen accept Medicare?
- Diana Mackensen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Mackensen's NPI active?
- Yes — Diana Mackensen's NPI (1629575329) is active in the NPPES registry as of the last update on 2018-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.