Gregory Knutzen, NP
NPI 1871554170 · Acute Care Nurse Practitioner · Colton, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Knutzen, NP is a Acute Care Nurse Practitioner provider in Colton, CA (NPI 1871554170).
Provider details
- NPI number
- 1871554170
- Entity type
- Individual
- Primary specialty
- Acute Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Male
- Sole proprietor
- Yes
- License
- 349887 (CA)
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 tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
357 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 337 | $58 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 20 | $85 |
Typical Medicare-allowed amounts for these services range $58–$85 (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 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 72 | 16 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 70 | 18 |
| Ribociclib Succinatebrand: Kisqali | 47 | — |
| Prednisone | 24 | — |
| Morphine Sulfatebrand: Morphine Sulfate Er | 18 | — |
| Hydroxyurea | 18 | — |
| Everolimus | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$7,376 across 300 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
- 2006-03-28
- Last updated
- 2020-11-09
- Certified
- 2020-11-09
Frequently asked questions
- What is Gregory Knutzen's NPI number?
- Gregory Knutzen's National Provider Identifier (NPI) is 1871554170, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Knutzen's specialty?
- Gregory Knutzen is listed in the NPPES registry with a primary specialty of Acute Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gregory Knutzen located?
- Gregory Knutzen's practice location on file with NPPES is 400 N Pepper Ave, Colton, CA 92324-1801.
- What is Gregory Knutzen's phone number?
- The practice phone number listed in the NPPES registry for Gregory Knutzen is (909) 580-2775.
- Does Gregory Knutzen accept Medicare?
- Gregory Knutzen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Knutzen's NPI active?
- Yes — Gregory Knutzen's NPI (1871554170) is active in the NPPES registry as of the last update on 2020-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.