Marcia Tonnesen, M.D.
NPI 1205883238 · Dermatology Physician · East Setauket, NY
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcia Tonnesen, M.D. is a Dermatology Physician provider in East Setauket, NY (NPI 1205883238).
Provider details
- NPI number
- 1205883238
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- License
- 181378 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
244 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) |
|---|---|---|
| Therapy Procedure Using Ultraviolet Radiation With Tar Or Petroleum Jelly Application96910 | 185 | $145 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 43 | $151 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 16 | $107 |
Typical Medicare-allowed amounts for these services range $107–$151 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-27
- Last updated
- 2007-07-08
Frequently asked questions
- What is Marcia Tonnesen's NPI number?
- Marcia Tonnesen's National Provider Identifier (NPI) is 1205883238, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcia Tonnesen's specialty?
- Marcia Tonnesen is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Marcia Tonnesen located?
- Marcia Tonnesen's practice location on file with NPPES is 181 N Belle Mead Rd, East Setauket, NY 11733-3495.
- What is Marcia Tonnesen's phone number?
- The practice phone number listed in the NPPES registry for Marcia Tonnesen is (631) 444-4200.
- Does Marcia Tonnesen accept Medicare?
- Marcia Tonnesen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcia Tonnesen's NPI active?
- Yes — Marcia Tonnesen's NPI (1205883238) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.