John Freiler, M.D.
NPI 1407863533 · Allergy Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Freiler, M.D. is a Allergy Physician provider in San Antonio, TX (NPI 1407863533).
Provider details
- NPI number
- 1407863533
- Entity type
- Individual
- Primary specialty
- Allergy PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA08413900 (NJ)
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 tenure25% of score
19 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
3,306 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) |
|---|---|---|
| Test for Allergy Using Allergenic Extract95004 | 2,306 | $3 |
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 540 | $13 |
| Test for Allergy Using Allergenic Extract Injected Into Skin95024 | 234 | $7 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 125 | $115 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 38 | $152 |
| Test to Measure Expiratory Airflow and Volume94010 | 34 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azelastine Hcl | 80 | 39 |
| Fluticasone Propion/Salmeterolbrand: Advair Hfa | 20 | — |
| Fluticasone Propionate | 19 | 11 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 19 | — |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 18 | 11 |
| Montelukast Sodium | 17 | — |
| Dupilumab |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,726 across 25 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
- 2006-08-02
- Last updated
- 2023-08-10
- Certified
- 2023-08-10
Frequently asked questions
- What is John Freiler's NPI number?
- John Freiler's National Provider Identifier (NPI) is 1407863533, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Freiler's specialty?
- John Freiler is listed in the NPPES registry with a primary specialty of Allergy Physician (Allopathic & Osteopathic Physicians).
- Where is John Freiler located?
- John Freiler's practice location on file with NPPES is 11840 Alamo Ranch Pkwy Ste 80, San Antonio, TX 78253-4191.
- What is John Freiler's phone number?
- The practice phone number listed in the NPPES registry for John Freiler is (210) 764-6567.
- Does John Freiler accept Medicare?
- John Freiler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Freiler's NPI active?
- Yes — John Freiler's NPI (1407863533) is active in the NPPES registry as of the last update on 2023-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.