Physician Profile
Unclaimed ProfileAbout HOLZHAUER
Robert J Holzhauer, MD is a healthcare provider in San Luis Obispo, CA specializing in allergy/immunology. Robert trained at Tulane University School of Medicine, graduating in 1972. Robert is also listed as specializing in allergy & immunology. According to Medicare claims data, Robert cared for 1,035 Medicare patients across 11,815 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (805) 543-2744
- Email not available
Practice Locations
1551 BISHOP ST SUITE 520
San Luis Obispo, CA 93401
Procedures Most Often Billed to Medicare
11,815 services · 1,035 patients · 17 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Test for allergy using allergenic extract | Treatment | 95004 |
2,867 |
| Professional service for preparation and provision of 1 or more antigens | Treatment | 95165 |
2,840 |
| Professional service for multiple injections of allergen | Treatment | 95117 |
925 |
| Test for allergy using allergenic extract injected into skin | Treatment | 95024 |
826 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
215 |
| Professional service for single injection of allergen | Treatment | 95115 |
195 |
| Test to measure the level of nitric oxide gas | Treatment | 95012 |
100 |
| Test to measure expiratory airflow and volume | Treatment | 94010 |
78 |
| Administration and interpretation of patient-focused health risk assessment | Treatment | 96160 |
77 |
| Test to measure expiratory airflow and volume changes before and after medication administration | Treatment | 94060 |
25 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other allergy/immunology specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other allergy/immunology specialists in San Luis Obispo 2
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Tulane University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1972 at Tulane University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Test for allergy using allergenic extract 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Holzhauer?
Dr. Holzhauer is an allergy/immunology in San Luis Obispo, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “ALLERGY/IMMUNOLOGY”.
NPI registry
What is Dr. Holzhauer's address?
Dr. Holzhauer is listed at 1551 BISHOP ST SUITE 520, San Luis Obispo, CA 93401. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Holzhauer?
The number on file is (805) 543-2744. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Holzhauer's NPI number?
Dr. Holzhauer's National Provider Identifier is 1710955976. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Holzhauer train?
Dr. Holzhauer attended Tulane University School of Medicine, graduating in 1972. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Holzhauer been practicing?
Dr. Holzhauer has 54 years experience. Calculated from a graduation year of 1972, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Holzhauer perform?
According to Medicare billing data, Dr. Holzhauer provides treatments such as test for allergy using allergenic extract and professional service for preparation and provision of 1 or more antigens, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Holzhauer confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Holzhauer. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.