NPPES file of Aug 9, 2026

Catherine Baker, MD

Dermatology Physician · Boston, MA

Catherine Baker, MD is a dermatology physician with a practice address in Boston, Massachusetts, and NPI 1942836929, issued on Mar 21, 2020. Check the license (Massachusetts 1017699, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1942836929
Name
Catherine Baker
Credential
MD
Primary taxonomy
Dermatology Physician 207N00000X
License number
1017699 MA
Self-reported in NPPES; status is on the state search
Practice location
800 Washington St, Boston, MA 02111
Phone
(617) 636-5000
Enumerated
Mar 21, 2020
Record last updated
Nov 15, 2024
Medicare enrollment
Enrolled (PECOS I20240715002453); accepts Medicare assignment
Medical or professional school
Geisel School Of Medicine At Dartmouth, 2020
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 800 Washington St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jeffrey Aalberg, MD, MPHSurgery Physician1326788027
  2. Omer Abbak, PHARMDPharmacist1114500337
  3. Aya Abdelnaser, MDStudent in an Organized Health Care Education/Training Program1770425373
  4. Marie Elise Abi Antoun, MDObstetrics & Gynecology Physician1356042626
  5. Ahmad AboalfarajSurgery Physician1538517651
  6. Tala Abu Samaan, MDStudent in an Organized Health Care Education/Training Program1376386250

Verify Catherine Baker in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
    Search for license 1017699
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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85% fewer Medicare Part D claims than the average dermatology physician in 2024

122 Medicare Part D claims for 50 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.

  1. Catherine Baker122
  2. Specialty average797

Most prescribed

  1. Clobetasol Propionate19 claims
  2. Ketoconazole16 claims
  3. Triamcinolone Acetonide15 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.

Industry payments in 2024: $323.74

8 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 10,250 providers of this specialty with any payment received $8,544.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Catherine Baker$323.74
  2. Specialty average$8,544.61

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Pratt Med/surg Dermatology Associates IncBoston, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Dermatology Physician providers in Massachusetts

There are 627 dermatology physician records in Massachusetts.

Other dermatology physician records in Massachusetts

  1. Zainab AbbasWorcester, MA1609028000
  2. Christopher Adams, M.D.Boston, MA1871777615
  3. Adewunmi Adelaja, MD, PHDBoston, MA1396488615
  4. David Aghassi, MDWellesley, MA1285698936
  5. Abdul Ahmed, MDBoston, MA1417947516
  6. Ali Al-Haseni, M.D.Boston, MA1144751777
  7. Abdullah Alajaji, MDBoston, MA1356698351
  8. Rhoda Alani, M.D.Boston, MA1154385268
  9. Christina Alavian, M.D.Worcester, MA1356376461
  10. Lee Albert, MDMilford, MA1619974102

Common questions

What is Catherine Baker, MD's NPI number?

Catherine Baker, MD's National Provider Identifier (NPI) is 1942836929, issued on Mar 21, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Catherine Baker, MD located?

The NPPES record lists a practice address at 800 Washington St, Boston, MA, 02111. Phone: (617) 636-5000. Providers update this record themselves, so call before visiting.

How can I verify Catherine Baker, MD's license?

NPPES lists Massachusetts license number 1017699, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Catherine Baker, MD prescribe under Medicare Part D?

In 2024, Catherine Baker, MD had 122 Medicare Part D claims for 50 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.

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.