Colleen Diferdinando, APN
NPI 1558946533 · Family Nurse Practitioner · Denver, CO
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Colleen Diferdinando, APN is a Family Nurse Practitioner provider in Denver, CO (NPI 1558946533).
Provider details
- NPI number
- 1558946533
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APN
- Sex
- Female
- Sole proprietor
- No
- License
- APN.0995334-NP (CO)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
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 tenure25% of score
5 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
455 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 179 | $80 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 104 | $53 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 60 | $51 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 52 | $14 |
| Urinalysis, Manual Test81002 | 35 | $3 |
| Administration of Influenza Virus Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 79 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 179 | 47 |
| Atorvastatin Calcium | 146 | 48 |
| Lisinopril | 107 | 32 |
| Amlodipine Besylate | 90 | 27 |
| Gabapentin | 84 | 25 |
| Omeprazole | 81 | 26 |
| Albuterol Sulfate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$178 across 8 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
Additional practice locations (1)
- 13700 Colorado BlvdThornton, CO 80602-7024Phone: (303) 451-4250
Registry dates
- Enumerated
- 2021-03-11
- Last updated
- 2026-05-15
- Certified
- 2026-05-15
Frequently asked questions
- What is Colleen Diferdinando's NPI number?
- Colleen Diferdinando's National Provider Identifier (NPI) is 1558946533, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Colleen Diferdinando's specialty?
- Colleen Diferdinando is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Colleen Diferdinando located?
- Colleen Diferdinando's practice location on file with NPPES is 8354 E Northfield Blvd Ste 3700, Denver, CO 80238-3131.
- What is Colleen Diferdinando's phone number?
- The practice phone number listed in the NPPES registry for Colleen Diferdinando is (866) 849-0692.
- Does Colleen Diferdinando accept Medicare?
- Colleen Diferdinando is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Colleen Diferdinando's NPI active?
- Yes — Colleen Diferdinando's NPI (1558946533) is active in the NPPES registry as of the last update on 2026-05-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.