Christopher Diefenbach, MD
NPI 1437440070 · Orthopaedic Foot and Ankle Surgery Physician · Flagstaff, AZ
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Diefenbach, MD is a Orthopaedic Foot and Ankle Surgery Physician provider in Flagstaff, AZ (NPI 1437440070).
Provider details
- NPI number
- 1437440070
- Entity type
- Individual
- Primary specialty
- Orthopaedic Foot and Ankle Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 53879 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 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
689 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) |
|---|---|---|
| X-Ray of Foot, Minimum of 3 Views73630 | 182 | $33 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 147 | $88 |
| X-Ray of Ankle, Minimum of 3 Views73610 | 130 | $35 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 76 | $124 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 49 | $109 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Meloxicam | 85 | 48 |
| Gabapentin | 40 | 14 |
| Baclofen | 33 | 21 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 27 | 18 |
| Cephalexin | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$26,070 across 31 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)
- 1485 N Turquoise Dr Ste 200Flagstaff, AZ 86001-2000Phone: (928) 774-7757Fax: (928) 774-7767
Registry dates
- Enumerated
- 2011-05-01
- Last updated
- 2022-07-21
Frequently asked questions
- What is Christopher Diefenbach's NPI number?
- Christopher Diefenbach's National Provider Identifier (NPI) is 1437440070, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Diefenbach's specialty?
- Christopher Diefenbach is listed in the NPPES registry with a primary specialty of Orthopaedic Foot and Ankle Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Diefenbach located?
- Christopher Diefenbach's practice location on file with NPPES is 107 E Oak Ave, Flagstaff, AZ 86001.
- What is Christopher Diefenbach's phone number?
- The practice phone number listed in the NPPES registry for Christopher Diefenbach is (928) 779-7880.
- Does Christopher Diefenbach accept Medicare?
- Christopher Diefenbach is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Diefenbach's NPI active?
- Yes — Christopher Diefenbach's NPI (1437440070) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.