Joseph Zahn, M.D.
NPI 1386058048 · Dermatology Physician · Washington, DC
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Zahn, M.D. is a Dermatology Physician provider in Washington, DC (NPI 1386058048).
Provider details
- NPI number
- 1386058048
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD047809 (DC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
10,235 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 8,070 | $39 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 1,298 | $42 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 520 | $44 |
| Special Stained Specimen Slides to Identify Organisms Including Interpretation and Report88312 | 235 | $57 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 83 | $22 |
| Special Stained Specimen Slides to Examine Tissue Including Interpretation and Report88313 | 29 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-06-19
- Last updated
- 2026-01-12
- Certified
- 2026-01-12
Frequently asked questions
- What is Joseph Zahn's NPI number?
- Joseph Zahn's National Provider Identifier (NPI) is 1386058048, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Zahn's specialty?
- Joseph Zahn is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Zahn located?
- Joseph Zahn's practice location on file with NPPES is 2150 Pennsylvania Ave Nw, Washington, DC 20037-3201.
- What is Joseph Zahn's phone number?
- The practice phone number listed in the NPPES registry for Joseph Zahn is (202) 741-3000.
- Does Joseph Zahn accept Medicare?
- Joseph Zahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Zahn's NPI active?
- Yes — Joseph Zahn's NPI (1386058048) is active in the NPPES registry as of the last update on 2026-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.