Physician Profile
Joseph Zahn, M.D.
Unclaimed ProfileAbout Dr. Zahn
Based in Washington, DC, Joseph Zahn, M.D. is listed in the NPI registry under dermatology. Joseph is also listed as specializing in dermatopathology. According to Medicare claims data, Joseph cared for 5,235 Medicare patients across 10,235 services. The services billed most often include pathology examination of tissue using a microscope, intermediate complexity, special stained specimen slides to examine tissue, initial procedure, and special stained specimen slides to examine tissue, each additional procedure.
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
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (202) 741-3000
- Email not available
Practice Locations
2150 PENNSYLVANIA AVE NW
Washington, DC 20037
Conditions Commonly Evaluated or Treated
Within Dermatology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Acne and follicular disorders
Eczema and inflammatory skin disease
Infections and infestations
Pigment, growths, and benign lesions
Skin cancer
Urticaria, itch, and vascular
Autoimmune and connective tissue
Infections
Rashes & allergy
Skin growths
Procedures & services
Most searched procedures
Diagnostic procedures
Lesion treatment
- Complex skin lesion excision
- Cryotherapy for skin lesions
- Electrodesiccation and curettage
- Incision and drainage of an abscess
Medical dermatology treatment
Cosmetic
Cosmetic and minor surgery
Cosmetic dermatology
Diagnostic
General dermatology
Infections
Medical dermatology
Nails & hair
Skin cancer surgery
Skin growths
Procedures Most Often Billed to Medicare
10,235 services · 5,235 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Pathology examination of tissue using a microscope, intermediate complexity | Lab test | 88305 |
8,070 | More than most peers in Dermatology |
| Special stained specimen slides to examine tissue, initial procedure | Lab test | 88342 |
1,298 | More than most peers in Dermatology |
| Special stained specimen slides to examine tissue, each additional procedure | Lab test | 88341 |
520 | More often than most peers in Dermatology |
| Special stained specimen slides to identify organisms including interpretation and report | Lab test | 88312 |
235 | More often than most peers in Dermatology |
| Pathology examination of tissue using a microscope, moderately low complexity | Lab test | 88304 |
83 | More often than most peers in Dermatology |
| Special stained specimen slides to examine tissue including interpretation and report | Lab test | 88313 |
29 | As often as other peers in Dermatology |
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.
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 dermatologists in Washington 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 2014 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Joseph Zahn specialize in?
Joseph Zahn is a dermatologist (skin doctor) in Washington, DC. That is the designation recorded for this NPI in the federal registry, where it is listed as “Dermatology”.
NPI registry
Where is Joseph Zahn located?
Joseph Zahn is listed at 2150 Pennsylvania Ave Nw, Washington, DC 20037. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Joseph Zahn's phone number?
The number on file is (202) 741-3000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Joseph Zahn's NPI number?
Joseph Zahn's National Provider Identifier is 1386058048. 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 Joseph Zahn train?
Joseph Zahn attended Other, graduating in 2014. This comes from the CMS National Downloadable File.
CMS public data
How long has Joseph Zahn been practicing?
Joseph Zahn has 12 years experience. Calculated from a graduation year of 2014, reported in the CMS National Downloadable File.
CMS public data
What does Joseph Zahn do most often?
According to Medicare billing data, Joseph Zahn the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Joseph Zahn confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Joseph Zahn. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.