Charles W. Cahill, M.D.
Gynecology Physician · Westfield, MA
Charles W. Cahill, M.D. is a gynecology physician with a practice address in Westfield, Massachusetts, and NPI 1366441602, issued on Jul 19, 2005. Check the license (Massachusetts 38657, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Charles W. Cahill
- Credential
- M.D.
- Primary taxonomy
- Gynecology Physician 207VG0400X
- License number
- 38657 MA
Self-reported in NPPES; status is on the state search - Practice location
- 57 Union St, Westfield, MA 01085
- Phone
- (413) 831-7960
- Enumerated
- Jul 19, 2005
- Record last updated
- Jul 10, 2024
- Fax
- (413) 568-1079
- Medicare enrollment
- Enrolled (PECOS I20120330000378); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gynecology physician records → All 128 in Massachusetts → Look up another NPI →
Also registered at 57 Union St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Calvin Chandler, LICSWClinical Social Worker1326142746
- Nicole Clemente, PA-CMedical Physician Assistant1730941980
- Laura Gioiella, MDInternal Medicine Physician1609864933
- Jessica Grabowski, PA-CMedical Physician Assistant1013326172
- Eliana Lakritz, RDRegistered Dietitian1942674247
- Ellen Lambert, PA-CMedical Physician Assistant1891532677
Verify Charles W. Cahill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 38657Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% more Medicare Part D claims than the average gynecology physician in 2024
507 Medicare Part D claims for 153 beneficiaries, against an average of 299 among the 1,919 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol94 claims
- Alendronate Sodium46 claims
- Clotrimazole-Betamethasone45 claims
- Valacyclovir38 claims
- Fluconazole29 claims
- Norethindrone Acetate27 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.
Bills Medicare through one group practice
- Baystate Medical Practices IncWestfield, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Charles W. Cahill among 128 gynecology physician records in Massachusetts
Charles W. Cahill, M.D. is one of 128 gynecology physician records with a practice address in Massachusetts. 56% 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, 84% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileYes · 39% of these records are
- Graduated1974 · median 1994 among the 50 with a school on file
- Record last updated2024 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VG0400X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gynecology Physician providers in Massachusetts
There are 128 gynecology physician records in Massachusetts.
All 128 in Massachusetts → Every provider in Westfield → Gynecology Physician nationwide →
The 8 gynecology physician records with the nearest ZIP codes
- John Sorrentino, M.D.West Springfield, MA 010891932179504
- Aleli Villanueva, M.D.West Springfield, MA 010891134199334
- Marilyn Hajar, MDSpringfield, MA 011071285789651
- Kathleen Mahoney, MDSpringfield, MA 011071174586952
- Howard Trietsch, MDSpringfield, MA 011071629031448
- Ruth Pryor, M.D.Northampton, MA 010601548230766
- Sharon Macmillan, MDAgawam, MA 010011952369175
- Asghar Rahaghi, M.D.Pittsfield, MA 012011972681138
Common questions
What is Charles W. Cahill, M.D.'s NPI number?
Charles W. Cahill, M.D.'s National Provider Identifier (NPI) is 1366441602, issued on Jul 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Charles W. Cahill, M.D. located?
The NPPES record lists a practice address at 57 Union St, Westfield, MA, 01085. Phone: (413) 831-7960. Providers update this record themselves, so call before visiting.
How can I verify Charles W. Cahill, M.D.'s license?
NPPES lists Massachusetts license number 38657, 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 Charles W. Cahill, M.D. prescribe under Medicare Part D?
In 2024, Charles W. Cahill, M.D. had 507 Medicare Part D claims for 153 beneficiaries; the average among gynecology physician prescribers was 299. 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.