K. Erik Kostelnik, M.D.
Dermatology Physician · Portland, ME
K. Erik Kostelnik, M.D. is a dermatology physician with a practice address in Portland, Maine, and NPI 1346289683, issued on Jun 5, 2006. Check the license (Maine 014713, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- K. Erik Kostelnik
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 014713 ME
Self-reported in NPPES; status is on the state search - Practice location
- 50 Sewall St, Portland, ME 04102
- Phone
- (207) 775-3526
- Enumerated
- Jun 5, 2006
- Record last updated
- Oct 16, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (207) 775-5658
- Medicaid ID
- 431499999 ME
- Medicare enrollment
- Enrolled (PECOS I20050627000899); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 1992
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 58 in Maine → Look up another NPI →
Also registered at 50 Sewall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Baginski, M.D.Dermatology Physician1619915451
- David Baird, M.D.Dermatology Physician1700170149
- Allen Bruce, MD PHDDermatology Physician1427175934
- Chelsea Dugan, FNPFamily Nurse Practitioner1215976931
- Rachel Gormley, MDDermatopathology Physician1316267990
- Timothy Griffin, PTOrthopedic Physical Therapist1477738391
Verify K. Erik Kostelnik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 014713Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% more Medicare Part D claims than the average dermatology physician in 2024
1,080 Medicare Part D claims for 487 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Triamcinolone Acetonide274 claims
- Fluorouracil107 claims
- Fluocinonide60 claims
- Doxycycline Hyclate56 claims
- Ketoconazole55 claims
- Valacyclovir50 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 98.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Dermatology Associates, LLCPortland, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
K. Erik Kostelnik among 58 dermatology physician records in Maine
K. Erik Kostelnik, M.D. is one of 58 dermatology physician records with a practice address in Maine. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 53% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1992 · median 2004 among the 44 with a school on file
- Record last updated2008 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in Maine
There are 58 dermatology physician records in Maine.
All 58 in Maine → Every provider in Portland → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- David Baginski, M.D.Portland, ME 041021619915451
- David Baird, M.D.Portland, ME 041021700170149
- Jennifer Bragg, M.D.Portland, ME 041021093921025
- Nathan Brewer, M.D.Portland, ME 041021679610786
- Allen Bruce, MD PHDPortland, ME 041021427175934
- Soren Craig-Muller, M.D.Portland, ME 041021205214798
- Leopold Laufer, MDPortland, ME 041021336194547
- Allison McCrory, M.D.Portland, ME 041021992753743
Common questions
What is K. Erik Kostelnik, M.D.'s NPI number?
K. Erik Kostelnik, M.D.'s National Provider Identifier (NPI) is 1346289683, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is K. Erik Kostelnik, M.D. located?
The NPPES record lists a practice address at 50 Sewall St, Portland, ME, 04102. Phone: (207) 775-3526. Providers update this record themselves, so call before visiting.
How can I verify K. Erik Kostelnik, M.D.'s license?
NPPES lists Maine license number 014713, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does K. Erik Kostelnik, M.D. prescribe under Medicare Part D?
In 2024, K. Erik Kostelnik, M.D. had 1,080 Medicare Part D claims for 487 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is K. Erik Kostelnik, M.D.'s MIPS final score?
The 2023 MIPS final score is 98.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.