Karen E. Warschaw, M.D.
Dermatopathology Physician · Scottsdale, AZ
Karen E. Warschaw, M.D. is a dermatopathology physician with a practice address in Scottsdale, Arizona, and NPI 1538142625, issued on Nov 22, 2005. Check the license (Arizona 28895, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Karen E. Warschaw
- Credential
- M.D.
- Primary taxonomy
- Dermatopathology Physician 207ND0900X
- License number
- 28895 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 9060 E Via Linda, Scottsdale, AZ 85258
- Phone
- (480) 275-2494
- Enumerated
- Nov 22, 2005
- Record last updated
- Jan 7, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (480) 772-4296
- Medicaid ID
- 554510 AZ
- Medicare enrollment
- Enrolled (PECOS I20100111000021); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1985
- Entity
- Type 1 · individual
8 nearest dermatopathology physician records → All 13 in Arizona → Look up another NPI →
Also registered at 9060 E Via Linda
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Reena Bansal, M.D.Critical Care Medicine (Internal Medicine) Physician1366857187
- Nicole Hoxworth, M.D.Dermatopathology (Pathology) Physician1073712717
- Joshua Mason, M.D.Critical Care Medicine (Internal Medicine) Physician1245557784
- David Terrano, MD, PHDDermatopathology (Pathology) Physician1609169267
- Paul Viso, RPHPharmacist1740301332
Verify Karen E. Warschaw in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 28895Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Richard Bernert LLCPhoenix, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen E. Warschaw among 13 dermatopathology physician records in Arizona
Karen E. Warschaw, M.D. is one of 13 dermatopathology physician records with a practice address in Arizona. 54% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 54% of these records are
- In the CMS Doctors and Clinicians fileYes · 46% of these records are
- Record last updated2015 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ND0900X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatopathology Physician providers in Arizona
There are 13 dermatopathology physician records in Arizona.
All 13 in Arizona → Every provider in Scottsdale → Dermatopathology Physician nationwide →
The 8 dermatopathology physician records with the nearest ZIP codes
- Mary Landau-Levine, MDScottsdale, AZ 852601699743294
- Sarah Estrada, M.D.Scottsdale, AZ 852551548350218
- Toni Stockton, M.D.Phoenix, AZ 850481972565109
- Yebabe Mengesha, MDPhoenix, AZ 850271689687410
- James Kalivas, M.D.Phoenix, AZ 850181639295843
- Cynthia O'Neil, MDGreen Valley, AZ 856141194028266
- Richard Miller, MDTucson, AZ 857121669514030
- Jill Cohen, M.D.Tucson, AZ 857151467457267
Common questions
What is Karen E. Warschaw, M.D.'s NPI number?
Karen E. Warschaw, M.D.'s National Provider Identifier (NPI) is 1538142625, issued on Nov 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Karen E. Warschaw, M.D. located?
The NPPES record lists a practice address at 9060 E Via Linda, Scottsdale, AZ, 85258. Phone: (480) 275-2494. Providers update this record themselves, so call before visiting.
How can I verify Karen E. Warschaw, M.D.'s license?
NPPES lists Arizona license number 28895, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Karen E. Warschaw, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.