Gregory Grahek, NP-BC
NPI 1558554188 · Acute Care Nurse Practitioner · Pueblo, CO
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Grahek, NP-BC is a Acute Care Nurse Practitioner provider in Pueblo, CO (NPI 1558554188).
Provider details
- NPI number
- 1558554188
- Entity type
- Individual
- Primary specialty
- Acute Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP-BC
- Sex
- Male
- Sole proprietor
- No
- License
- 5441 (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 tenure33% of score
18 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 136 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 735 | 211 |
| Gabapentin | 420 | 85 |
| Levothyroxine Sodium | 377 | 102 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 341 | 49 |
| Lisinopril | 315 | 90 |
| Metformin Hcl | 227 | 66 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$471 across 24 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-08-27
- Last updated
- 2025-01-07
- Certified
- 2025-01-07
Frequently asked questions
- What is Gregory Grahek's NPI number?
- Gregory Grahek's National Provider Identifier (NPI) is 1558554188, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Grahek's specialty?
- Gregory Grahek is listed in the NPPES registry with a primary specialty of Acute Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gregory Grahek located?
- Gregory Grahek's practice location on file with NPPES is 1619 N Greenwood St Ste 208, Pueblo, CO 81003-2656.
- What is Gregory Grahek's phone number?
- The practice phone number listed in the NPPES registry for Gregory Grahek is (719) 564-4336.
- Does Gregory Grahek accept Medicare?
- Gregory Grahek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Grahek's NPI active?
- Yes — Gregory Grahek's NPI (1558554188) is active in the NPPES registry as of the last update on 2025-01-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.