Jillian Grzeskiewicz, APRN
NPI 1265170112 · Psychiatric/Mental Health Nurse Practitioner · Gunnison, CO
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jillian Grzeskiewicz, APRN is a Psychiatric/Mental Health Nurse Practitioner provider in Gunnison, CO (NPI 1265170112).
Provider details
- NPI number
- 1265170112
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- No
- License
- C-APN.0100340-C-NP (CO)
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
4 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
111 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 79 | $55 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 32 | $77 |
Typical Medicare-allowed amounts for these services range $55–$77 (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 · 37 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Olanzapine | 69 |
| Clozapine | 66 |
| Duloxetine Hcl | 58 |
| Divalproex Sodium | 50 |
| Mirtazapine | 49 |
| Aripiprazole | 48 |
| Gabapentin | 46 |
| Trazodone Hcl | 42 |
| Lorazepam | 42 |
| Lithium Carbonate | 40 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-05-21
- Last updated
- 2026-02-09
- Certified
- 2026-02-09
Frequently asked questions
- What is Jillian Grzeskiewicz's NPI number?
- Jillian Grzeskiewicz's National Provider Identifier (NPI) is 1265170112, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jillian Grzeskiewicz's specialty?
- Jillian Grzeskiewicz is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Jillian Grzeskiewicz located?
- Jillian Grzeskiewicz's practice location on file with NPPES is 710 N Taylor St, Gunnison, CO 81230-2244.
- What is Jillian Grzeskiewicz's phone number?
- The practice phone number listed in the NPPES registry for Jillian Grzeskiewicz is (970) 252-3200.
- Does Jillian Grzeskiewicz accept Medicare?
- Jillian Grzeskiewicz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jillian Grzeskiewicz's NPI active?
- Yes — Jillian Grzeskiewicz's NPI (1265170112) is active in the NPPES registry as of the last update on 2026-02-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.