Christopher Ladner, MD, PHD
NPI 1134203722 · Diagnostic Radiology Physician · Greenfield, MA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Ladner, MD, PHD is a Diagnostic Radiology Physician provider in Greenfield, MA (NPI 1134203722).
Provider details
- NPI number
- 1134203722
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 0420011172 (VT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
6,370 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 | 1,118 | $8 |
| X-Ray of Chest, 2 Views71046 | 1,098 | $10 |
| Ct Scan Head Or Brain Without Contrast70450 | 796 | $39 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 477 | $86 |
| Ct Scan of Upper Spine Without Contrast72125 | 312 | $46 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 297 | $21 |
| Ct Scan of Chest With Contrast |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-24
- Last updated
- 2014-02-18
Frequently asked questions
- What is Christopher Ladner's NPI number?
- Christopher Ladner's National Provider Identifier (NPI) is 1134203722, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Ladner's specialty?
- Christopher Ladner is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Ladner located?
- Christopher Ladner's practice location on file with NPPES is 164 High St, Greenfield, MA 01301-2613.
- What is Christopher Ladner's phone number?
- The practice phone number listed in the NPPES registry for Christopher Ladner is (413) 773-2063.
- Does Christopher Ladner accept Medicare?
- Christopher Ladner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Ladner's NPI active?
- Yes — Christopher Ladner's NPI (1134203722) is active in the NPPES registry as of the last update on 2014-02-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.