William Parkkonen, NP
NPI 1851454276 · Psychiatric/Mental Health Nurse Practitioner · Marquette, MI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Parkkonen, NP is a Psychiatric/Mental Health Nurse Practitioner provider in Marquette, MI (NPI 1851454276).
Provider details
- NPI number
- 1851454276
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Male
- Sole proprietor
- No
- License
- 4704207327 (MI)
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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
466 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 | 240 | $98 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 193 | $56 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 33 | $72 |
Typical Medicare-allowed amounts for these services range $56–$98 (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 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 169 | 27 |
| Lamotrigine | 156 | 18 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 145 | 19 |
| Quetiapine Fumarate | 127 | 19 |
| Clonazepam | 125 | 20 |
| Bupropion Hclbrand: Bupropion Xl | 118 | 16 |
| Mirtazapine |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-18
- Last updated
- 2008-02-25
Frequently asked questions
- What is William Parkkonen's NPI number?
- William Parkkonen's National Provider Identifier (NPI) is 1851454276, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Parkkonen's specialty?
- William Parkkonen is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Parkkonen located?
- William Parkkonen's practice location on file with NPPES is 580 W College Ave, Marquette, MI 49855-2705.
- What is William Parkkonen's phone number?
- The practice phone number listed in the NPPES registry for William Parkkonen is (906) 225-4690.
- Does William Parkkonen accept Medicare?
- William Parkkonen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Parkkonen's NPI active?
- Yes — William Parkkonen's NPI (1851454276) is active in the NPPES registry as of the last update on 2008-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.