John Fahrenholz, M.D.
NPI 1518958370 · Allergy & Immunology Physician · Nashville, TN
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Fahrenholz, M.D. is a Allergy & Immunology Physician provider in Nashville, TN (NPI 1518958370).
Provider details
- NPI number
- 1518958370
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD0000036516 (TN)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
107 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 | 55 | $100 |
| Professional Service for Multiple Injections of Allergen95117 | 39 | $11 |
| Test to Measure Expiratory Airflow and Volume94010 | 13 | $26 |
Typical Medicare-allowed amounts for these services range $11–$100 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Montelukast Sodium | 45 |
| Omalizumabbrand: Xolair | 29 |
| Famotidine | 19 |
| Prednisone | 18 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 17 |
| Cromolyn Sodium | 17 |
| Dupilumabbrand: Dupixent Pen | 14 |
| Dupilumabbrand: Dupixent Syringe | 14 |
| Tacrolimus |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$40,047 across 42 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
Registry dates
- Enumerated
- 2005-11-02
- Last updated
- 2022-03-25
- Certified
- 2022-03-25
Frequently asked questions
- What is John Fahrenholz's NPI number?
- John Fahrenholz's National Provider Identifier (NPI) is 1518958370, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Fahrenholz's specialty?
- John Fahrenholz is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is John Fahrenholz located?
- John Fahrenholz's practice location on file with NPPES is 3601 the Vanderbilt Clinic, Nashville, TN 37232-5100.
- What is John Fahrenholz's phone number?
- The practice phone number listed in the NPPES registry for John Fahrenholz is (615) 322-3000.
- Does John Fahrenholz accept Medicare?
- John Fahrenholz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Fahrenholz's NPI active?
- Yes — John Fahrenholz's NPI (1518958370) is active in the NPPES registry as of the last update on 2022-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.