Guido Grasso-Knight, M.D.
NPI 1164644266 · Family Medicine Physician · Carol Stream, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guido Grasso-Knight, M.D. is a Family Medicine Physician provider in Carol Stream, IL (NPI 1164644266).
Provider details
- NPI number
- 1164644266
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 254524 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
434 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 | 148 | $132 |
| 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 | 116 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 54 | $93 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 47 | $133 |
| X-Ray of Chest, 2 Views71046 | 19 | $24 |
| Administration of Influenza Virus Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 361 | 110 |
| Amlodipine Besylate | 128 | 43 |
| Lisinopril | 108 | 35 |
| Metformin Hcl | 95 | 31 |
| Levothyroxine Sodium | 83 | 24 |
| Losartan Potassium | 62 | 18 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$68 across 3 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)
- 3231 Euclid AveMacneal Family Medicine ResidencyBerwyn, IL 60402-3466Phone: (708) 783-2000Fax: (708) 783-3656
Registry dates
- Enumerated
- 2007-05-02
- Last updated
- 2021-03-17
- Certified
- 2021-03-17
Frequently asked questions
- What is Guido Grasso-Knight's NPI number?
- Guido Grasso-Knight's National Provider Identifier (NPI) is 1164644266, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guido Grasso-Knight's specialty?
- Guido Grasso-Knight is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Guido Grasso-Knight located?
- Guido Grasso-Knight's practice location on file with NPPES is 630 E North Ave, Carol Stream, IL 60188-2127.
- What is Guido Grasso-Knight's phone number?
- The practice phone number listed in the NPPES registry for Guido Grasso-Knight is (630) 458-5300.
- Does Guido Grasso-Knight accept Medicare?
- Guido Grasso-Knight is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guido Grasso-Knight's NPI active?
- Yes — Guido Grasso-Knight's NPI (1164644266) is active in the NPPES registry as of the last update on 2021-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.