Gerald Holtz, M.D.
NPI 1578649554 · Diagnostic Radiology Physician · Naperville, IL
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gerald Holtz, M.D. is a Diagnostic Radiology Physician provider in Naperville, IL (NPI 1578649554).
Provider details
- NPI number
- 1578649554
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 36-44766 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,068 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 408 | $8 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 151 | $82 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 106 | $86 |
| Ct Scan Head Or Brain Without Contrast70450 | 97 | $40 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 60 | $85 |
| Ct Scan of Chest Without Contrast71250 | 46 | $50 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-31
- Last updated
- 2011-01-06
Frequently asked questions
- What is Gerald Holtz's NPI number?
- Gerald Holtz's National Provider Identifier (NPI) is 1578649554, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerald Holtz's specialty?
- Gerald Holtz is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Gerald Holtz located?
- Gerald Holtz's practice location on file with NPPES is 705 S Sleight St, Naperville, IL 60540-6628.
- What is Gerald Holtz's phone number?
- The practice phone number listed in the NPPES registry for Gerald Holtz is (630) 903-4520.
- Does Gerald Holtz accept Medicare?
- Gerald Holtz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gerald Holtz's NPI active?
- Yes — Gerald Holtz's NPI (1578649554) is active in the NPPES registry as of the last update on 2011-01-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.