Joseph W. Diehl, M.D.
MOHS-Micrographic Surgery Physician · Sn Luis Obisp, CA
Joseph W. Diehl, M.D. is a mohs-micrographic surgery physician with a practice address in Sn Luis Obisp, California, and NPI 1366731960, issued on Apr 4, 2011. Check the license (California A124317, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph W. Diehl
- Credential
- M.D.
- Primary taxonomy
- MOHS-Micrographic Surgery Physician 207ND0101X
- License number
- A124317 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15 Santa Rosa St, Sn Luis Obisp, CA 93405
- Phone
- (805) 541-2650
- Enumerated
- Apr 4, 2011
- Record last updated
- Dec 12, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150723007679); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest mohs-micrographic surgery physician records → All 164 in California → Look up another NPI →
Verify Joseph W. Diehl in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A124317Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average mohs-micrographic surgery physician in 2024
1,706 Medicare Part D claims for 906 beneficiaries, against an average of 570 among the 1,396 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims.
Most prescribed
- Betamethasone Diprop Augmented206 claims
- Gentamicin Sulfate202 claims
- Fluorouracil178 claims
- Ketoconazole177 claims
- Triamcinolone Acetonide148 claims
- Valacyclovir77 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): 75.2 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: $735.98
10 payments; by number, the most common kind was food and beverage; the largest payer was Organogenesis Inc. The 1,074 providers of this specialty with any payment received $4,075.23 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
- San Luis Dermatology, Inc.San Luis Obispo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph W. Diehl among 164 mohs-micrographic surgery physician records in California
Joseph W. Diehl, M.D. is one of 164 mohs-micrographic surgery physician records with a practice address in California. 95% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 68% of them.
- NPI issued2011 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 95% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated2011 · median 2004 among the 143 with a school on file
- Record last updated2018 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ND0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
MOHS-Micrographic Surgery Physician providers in California
There are 164 mohs-micrographic surgery physician records in California.
All 164 in California → MOHS-Micrographic Surgery Physician nationwide →
The 8 mohs-micrographic surgery physician records with the nearest ZIP codes
- Bradley Kurgis, DOTempleton, CA 934651770529620
- Lynn Cranmer, MDBakersfield, CA 933011063564425
- Robert Leposavic, M.D.Santa Barbara, CA 931111396847182
- Derek Beaulieu, MDSanta Barbara, CA 931051376033043
- Mark Burnett, M.D.Santa Barbara, CA 931051104182393
- Mary Hartman, M.D.Santa Barbara, CA 931031437156684
- Sino MehrmalFresno, CA 937101063040145
- Jared Lund, MDFresno, CA 937111144424763
Common questions
What is Joseph W. Diehl, M.D.'s NPI number?
Joseph W. Diehl, M.D.'s National Provider Identifier (NPI) is 1366731960, issued on Apr 4, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Joseph W. Diehl, M.D. located?
The NPPES record lists a practice address at 15 Santa Rosa St, Sn Luis Obisp, CA, 93405. Phone: (805) 541-2650. Providers update this record themselves, so call before visiting.
How can I verify Joseph W. Diehl, M.D.'s license?
NPPES lists California license number A124317, 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 Joseph W. Diehl, M.D. prescribe under Medicare Part D?
In 2024, Joseph W. Diehl, M.D. had 1,706 Medicare Part D claims for 906 beneficiaries; the average among mohs-micrographic surgery physician prescribers was 570. Part D covers Medicare prescriptions only.
What is Joseph W. Diehl, M.D.'s MIPS final score?
The 2023 MIPS final score is 75.2 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.