Diana Guillaume, NP
NPI 1396037685 · Adult Health Nurse Practitioner · Skokie, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Guillaume, NP is a Adult Health Nurse Practitioner provider in Skokie, IL (NPI 1396037685).
Provider details
- NPI number
- 1396037685
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 277.005282 (IL)
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
15 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
132 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 Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 72 | $50 |
| Hemoglobin A1c Level83036 | 32 | $10 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 15 | $113 |
| Administration of Influenza Virus VaccineG0008 | 13 | $34 |
Typical Medicare-allowed amounts for these services range $10–$113 (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 · 97 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 835 | 277 |
| Metformin Hcl | 396 | 132 |
| Amlodipine Besylate | 315 | 99 |
| Lisinopril | 272 | 82 |
| Gabapentin | 226 | 96 |
| Rosuvastatin Calcium | 224 | 76 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-05-05
- Last updated
- 2026-04-14
- Certified
- 2026-04-14
Frequently asked questions
- What is Diana Guillaume's NPI number?
- Diana Guillaume's National Provider Identifier (NPI) is 1396037685, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Guillaume's specialty?
- Diana Guillaume is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Diana Guillaume located?
- Diana Guillaume's practice location on file with NPPES is 4120 Dempster St, Skokie, IL 60076-2101.
- What is Diana Guillaume's phone number?
- The practice phone number listed in the NPPES registry for Diana Guillaume is (224) 601-7032.
- Does Diana Guillaume accept Medicare?
- Diana Guillaume is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Guillaume's NPI active?
- Yes — Diana Guillaume's NPI (1396037685) is active in the NPPES registry as of the last update on 2026-04-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.