Robert Holzhauer, MD
NPI 1710955976 · Allergy & Immunology Physician · San Luis Obispo, CA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Holzhauer, MD is a Allergy & Immunology Physician provider in San Luis Obispo, CA (NPI 1710955976).
Provider details
- NPI number
- 1710955976
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- C37219 (CA)
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
8,543 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 | 2,867 | $4 |
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 2,840 | $15 |
| Professional Service for Multiple Injections of Allergen95117 | 925 | $13 |
| Test for Allergy Using Allergenic Extract Injected Into Skin95024 | 826 | $8 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 215 | $15 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 206 | $129 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azelastine Hcl | 52 | 21 |
| Ipratropium Bromide | 52 | 23 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 40 | 11 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 36 | 14 |
| Fluticasone Propionate | 34 | — |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 25 | — |
| Dupilumabbrand: Dupixent Pen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$759 across 39 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
- 2006-03-14
- Last updated
- 2023-10-17
- Certified
- 2023-10-17
Frequently asked questions
- What is Robert Holzhauer's NPI number?
- Robert Holzhauer's National Provider Identifier (NPI) is 1710955976, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Holzhauer's specialty?
- Robert Holzhauer is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Holzhauer located?
- Robert Holzhauer's practice location on file with NPPES is 1551 Bishop St, San Luis Obispo, CA 93401-4635.
- What is Robert Holzhauer's phone number?
- The practice phone number listed in the NPPES registry for Robert Holzhauer is (805) 543-2744.
- Does Robert Holzhauer accept Medicare?
- Robert Holzhauer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Holzhauer's NPI active?
- Yes — Robert Holzhauer's NPI (1710955976) is active in the NPPES registry as of the last update on 2023-10-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.