John Marx, MD
NPI 1720491731 · Family Medicine Physician · Fort Wayne, IN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Marx, MD is a Family Medicine Physician provider in Fort Wayne, IN (NPI 1720491731).
Provider details
- NPI number
- 1720491731
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 01076053A (IN)
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
12 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
441 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 | 186 | $118 |
| 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 | 97 | $15 |
| Hemoglobin A1c Level83036 | 42 | $10 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 36 | $121 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 34 | $85 |
| Administration of Influenza Virus Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 152 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 581 | 157 |
| Amlodipine Besylate | 369 | 101 |
| Levothyroxine Sodium | 309 | 76 |
| Omeprazole | 270 | 71 |
| Lisinopril | 268 | 81 |
| Gabapentin | 227 | 59 |
| Albuterol Sulfate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$970 across 35 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)
- 1818 Carew St Ste 120Fort Wayne, IN 46805-4764Phone: (260) 425-6200Fax: (260) 425-6205
Registry dates
- Enumerated
- 2014-06-06
- Last updated
- 2022-10-10
- Certified
- 2022-10-10
Frequently asked questions
- What is John Marx's NPI number?
- John Marx's National Provider Identifier (NPI) is 1720491731, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Marx's specialty?
- John Marx is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Marx located?
- John Marx's practice location on file with NPPES is 1007 W Rudisill Blvd, Fort Wayne, IN 46807-2170.
- What is John Marx's phone number?
- The practice phone number listed in the NPPES registry for John Marx is (260) 425-5180.
- Does John Marx accept Medicare?
- John Marx is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Marx's NPI active?
- Yes — John Marx's NPI (1720491731) is active in the NPPES registry as of the last update on 2022-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.