Gregory Castello, D.O.
NPI 1417939323 · Family Medicine Physician · Lombard, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Castello, D.O. is a Family Medicine Physician provider in Lombard, IL (NPI 1417939323).
Provider details
- NPI number
- 1417939323
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 036091537 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,106 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) |
|---|---|---|
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 844 | $85 |
| Fluoroscopic Guidance for Needle Placement77002 | 817 | $111 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 218 | $88 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 180 | $122 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 47 | $121 |
Typical Medicare-allowed amounts for these services range $85–$122 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 140 | 42 |
| Losartan Potassium | 89 | 24 |
| Levothyroxine Sodium | 77 | 21 |
| Atorvastatin Calcium | 75 | 27 |
| Sertraline Hcl | 44 | 14 |
| Lisinopril | 43 | 12 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$789 across 40 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)
- 2340 S Highland AveSuite 370Lombard, IL 60148-5371Phone: (630) 620-9500
Registry dates
- Enumerated
- 2005-11-16
- Last updated
- 2026-01-28
- Certified
- 2026-01-28
Frequently asked questions
- What is Gregory Castello's NPI number?
- Gregory Castello's National Provider Identifier (NPI) is 1417939323, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Castello's specialty?
- Gregory Castello is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Castello located?
- Gregory Castello's practice location on file with NPPES is 2 E 22nd St Ste 217, Lombard, IL 60148-6125.
- What is Gregory Castello's phone number?
- The practice phone number listed in the NPPES registry for Gregory Castello is (630) 620-9500.
- Does Gregory Castello accept Medicare?
- Gregory Castello is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Castello's NPI active?
- Yes — Gregory Castello's NPI (1417939323) is active in the NPPES registry as of the last update on 2026-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.