Karen Williams, MD
Pediatrics Physician · Oak Bluffs, MA
Karen Williams, MD is a pediatrics physician with a practice address in Oak Bluffs, Massachusetts, and NPI 1558384438, issued on Jul 25, 2006. Check the license (Massachusetts 270940, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Karen Williams
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 270940 MA
Self-reported in NPPES; status is on the state search - Practice location
- Martha's Vineyard Hospital, Oak Bluffs, MA 02557
- Phone
- (508) 693-3732
- Enumerated
- Jul 25, 2006
- Record last updated
- Jul 13, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (508) 790-6860
- Medicaid ID
- 5341302 NJ
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 2,628 in Massachusetts → Look up another NPI →
Also registered at Martha's Vineyard Hospital
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sandra Talanian, BSN, MPHFamily Medicine Physician1871233122
Verify Karen Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 270940Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average pediatrics physician in 2024
99 Medicare Part D claims for 32 beneficiaries, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D.
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.
Karen Williams among 2,628 pediatrics physician records in Massachusetts
Karen Williams, MD is one of 2,628 pediatrics physician records with a practice address in Massachusetts. 25% 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 16% of them.
- NPI issued2006 · 16% of these records are older, 48% newer
- In a Medicare fileYes · 25% of these records are
- In the CMS Doctors and Clinicians fileNo · 12% of these records are
- Record last updated2018 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 pediatrics physician records list a practice address in Oak Bluffs
They are 4 of the 143 NPPES records with a practice address in Oak Bluffs, and 2,628 pediatrics physician records in Massachusetts.
All 2,628 in Massachusetts → Every provider in Oak Bluffs → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Michael Goldfein, MDOak Bluff, MA 025571942303334
- Stephen Ko, MD MA MPH MDIVOak Bluffs, MA 025571669634648
- Melanie Miller, M.D.Oak Bluffs, MA 025571508893827
- Sonya Stevens, M.D.Oak Bluffs, MA 025571629097951
- Robert Reece, M.D.North Falmouth, MA 025561548208853
- Robert Ledwith, PASandwich, MA 025631881876621
- Frances Nenna, M.D.Sandwich, MA 025631770651796
- Cassandra PerrySandwich, MA 025631891317129
Common questions
What is Karen Williams, MD's NPI number?
Karen Williams, MD's National Provider Identifier (NPI) is 1558384438, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen Williams, MD located?
The NPPES record lists a practice address at Martha's Vineyard Hospital, Oak Bluffs, MA, 02557. Phone: (508) 693-3732. Providers update this record themselves, so call before visiting.
How can I verify Karen Williams, MD's license?
NPPES lists Massachusetts license number 270940, 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 Karen Williams, MD prescribe under Medicare Part D?
In 2024, Karen Williams, MD had 99 Medicare Part D claims for 32 beneficiaries; the average among pediatrics physician prescribers was 375. 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.