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JOSEPH ZAHN M.D.
NPI 1386058048
Dermatology in Washington, DC

Active since June 19, 2014PECOS EnrolledAccepts Medicare Assignment
2150 PENNSYLVANIA AVE NW, WASHINGTON, DC 20037(202) 741-3000 Get Directions Write a Review

NPPES record last updated: January 12, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jan 12, 2026, Apr 9, 2020, Oct 31, 2019 and 1 more (4 updates tracked since 2019).

About Joseph Zahn M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOSEPH ZAHN M.D. (NPI 1386058048) is an individual dermatology provider in Washington, District Of Columbia, licensed in Florida (ME177344) and active in the NPI registry since June 2014. He is enrolled in Medicare PECOS and is a graduate of Other (2014).

NPPES Registry Identity

NPI1386058048
Entity TypeIndividualMale
Primary Taxonomy207N00000X
Provider Legal NameJOSEPH ZAHNCredential: M.D.
Location Address2150 PENNSYLVANIA AVE NWWashington, DC 20037-3201
Mailing Address2150 Pennsylvania Ave NwWashington, DC 20037-3201
Phone(202) 741-3000
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateJune 19, 2014
Last NPPES UpdateJanuary 12, 20264 updates tracked since enumeration
NPPES CertifiedJanuary 12, 2026
✔ NPI 1386058048 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
Licenses✔ Licensed in FL · ME177344✔ Licensed in MI · 4301105521✔ Licensed in DC · MD047809
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
Also ListedDermatology · DermatopathologyTaxonomy 207ND0900X · License MD047809 (DC)
2150 PENNSYLVANIA AVE NW, Washington, DC 20037
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Joseph Zahn M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8426365370
PECOS Enrollment IDI20200102000213, I20251027000709, I20251029002928
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
8,070 services3,633 patients
Special stained specimen slides to examine tissue, initial procedure 88342
This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.
1,298 services998 patients
Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
520 services324 patients
Special stained specimen slides to identify organisms including interpretation and report 88312
This service involves coloring specimen slides in a special way to help identify organisms. The colors make different parts of the organism stand out. Afterward, a detailed interpretation and report on the findings are provided.
235 services181 patients
Pathology examination of tissue using a microscope, moderately low complexity 88304
A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.
83 services74 patients
Special stained specimen slides to examine tissue including interpretation and report 88313
Special stained specimen slides are used to examine tissue samples. This involves applying special dyes to the tissue, which helps to highlight certain features under a microscope. The findings are then interpreted and a report is provided. This can aid in diagnosing various health conditions.
29 services25 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20037 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$80.66 typical visit price
range $21.40 – $158.88
Typical copayment $20.16 (range $5.35 – $39.72)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LEI DU LYNN M.D.
Internal Medicine
2150 PENNSYLVANIA AVE NW, SUITE 5-416
WASHINGTON, DC 20037
District of Columbia (202) 741-2574
NIRAJ RAJU GOWDA MD
Student in an Organized Health Care Education/Training Program
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3000
DR. ELLEN CURTIN MURPHY MD
Obstetrics & Gynecology (Obstetrics)
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-2500
DR. CHRISTOPHER DAVID BADGER MD
Student in an Organized Health Care Education/Training Program
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3000
DR. MONICA MARIA MANRIQUE CASTRILLON MD
Student in an Organized Health Care Education/Training Program
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3000
DR. STEVEN JOSEPH RALSTON MD
Obstetrics & Gynecology (Maternal & Fetal Medicine)
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-2500
ROBERT STEVEN SIEGEL M.D.
Internal Medicine (Hematology & Oncology)
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3333
JAMES DAVID KATZ M.D.
Internal Medicine (Rheumatology)
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-2222

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Joseph Zahn's NPI number?

The NPI number for Joseph Zahn is 1386058048. It was assigned to this individual provider in the NPPES registry on June 19, 2014.

Where is Joseph Zahn located?

Joseph Zahn practices at 2150 Pennsylvania Ave NW, Washington, DC 20037. The listed phone number is (202) 741-3000.

What is Joseph Zahn's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is Joseph Zahn enrolled in Medicare?

Yes. Joseph Zahn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Joseph Zahn was last updated on January 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.