Joseph Diehl, M.D.
NPI 1366731960 · MOHS-Micrographic Surgery Physician · Sn Luis Obisp, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Diehl, M.D. is a MOHS-Micrographic Surgery Physician provider in Sn Luis Obisp, CA (NPI 1366731960).
Provider details
- NPI number
- 1366731960
- Entity type
- Individual
- Primary specialty
- MOHS-Micrographic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
23,981 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 9,814 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 3,478 | $98 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 2,662 | $60 |
| Destruction of Skin Growth, 1-14 Growths17110 | 1,201 | $119 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 966 | $137 |
| Destruction of Precancer Skin Growth, 15 Or More Growths17004 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Betamethasone/Propylene Glycbrand: Betamethasone Diprop Augmented | 206 | 132 |
| Gentamicin Sulfate | 202 | 177 |
| Fluorouracil | 178 | 150 |
| Ketoconazole | 177 | 109 |
| Triamcinolone Acetonide | 148 | 126 |
| Valacyclovir Hclbrand: Valacyclovir | 77 | 40 |
| Ciclopirox | 61 | 25 |
| Minoxidil |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$736 across 10 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
- 2011-04-04
- Last updated
- 2018-12-12
Frequently asked questions
- What is Joseph Diehl's NPI number?
- Joseph Diehl's National Provider Identifier (NPI) is 1366731960, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Diehl's specialty?
- Joseph Diehl is listed in the NPPES registry with a primary specialty of MOHS-Micrographic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Diehl located?
- Joseph Diehl's practice location on file with NPPES is 15 Santa Rosa St, Sn Luis Obisp, CA 93405-1811.
- What is Joseph Diehl's phone number?
- The practice phone number listed in the NPPES registry for Joseph Diehl is (805) 541-2650.
- Does Joseph Diehl accept Medicare?
- Joseph Diehl is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Diehl's NPI active?
- Yes — Joseph Diehl's NPI (1366731960) is active in the NPPES registry as of the last update on 2018-12-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.