Robert J. Holzhauer, MD
Allergy & Immunology Physician · San Luis Obispo, CA
Robert J. Holzhauer, MD is an allergy & immunology physician with a practice address in San Luis Obispo, California, and NPI 1710955976, issued on Mar 14, 2006. Check the license (California C37219, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert J. Holzhauer
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- C37219 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1551 Bishop St, San Luis Obispo, CA 93401
- Phone
- (805) 543-2744
- Enumerated
- Mar 14, 2006
- Record last updated
- Oct 17, 2023
- Fax
- (805) 543-0539
- Medicaid ID
- 1710955976 CA
- Medicare enrollment
- Enrolled (PECOS I20110719000770); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1972
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 444 in California → Look up another NPI →
Also registered at 1551 Bishop St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Douglas Burgess, L.C.S.W.Clinical Social Worker1700992062
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- Rodolfo Castillo-Ruiz, MDFamily Medicine Physician1174549182
- Gary Cushing, M.D.Gastroenterology Physician1962483545
- Dieter EckertDiagnostic Radiology Physician1740206606
Verify Robert J. Holzhauer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C37219Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
656 Medicare Part D claims for 150 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 55% of claims.
Most prescribed
- Azelastine Hcl52 claims
- Ipratropium Bromide52 claims
- Trelegy Ellipta40 claims
- Albuterol Sulfate Hfa36 claims
- Fluticasone Propionate34 claims
- Breo Ellipta25 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 56.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $758.83
39 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 2,496 providers of this specialty with any payment received $8,321.81 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Allergy Partners OF California IncSan Luis Obispo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert J. Holzhauer among 444 allergy & immunology physician records in California
Robert J. Holzhauer, MD is one of 444 allergy & immunology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1972 · median 2004 among the 281 with a school on file
- Record last updated2023 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
All 444 in California → Every provider in San Luis Obispo → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Arthur McLean, MDSan Luis Obispo, CA 934011639106727
- Daniel More, M.D.San Luis Obispo, CA 934011306844279
- Courtney Ramos, D.O.San Luis Obispo, CA 934011144670217
- Kelli Rose, M.D.San Luis Obispo, CA 934011407028798
- Glenn Singer, M.D.Bakersfield, CA 933091801275821
- Eric Boren, MDBakersfield, CA 933011720067598
- Tonny Tanus, MDBakersfield, CA 933011740351873
- Thuong Nguyen, M.D.Visalia, CA 932911831196294
Common questions
What is Robert J. Holzhauer, MD's NPI number?
Robert J. Holzhauer, MD's National Provider Identifier (NPI) is 1710955976, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert J. Holzhauer, MD located?
The NPPES record lists a practice address at 1551 Bishop St, San Luis Obispo, CA, 93401. Phone: (805) 543-2744. Providers update this record themselves, so call before visiting.
How can I verify Robert J. Holzhauer, MD's license?
NPPES lists California license number C37219, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert J. Holzhauer, MD prescribe under Medicare Part D?
In 2024, Robert J. Holzhauer, MD had 656 Medicare Part D claims for 150 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
What is Robert J. Holzhauer, MD's MIPS final score?
The 2023 MIPS final score is 56.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.