Glenda Grace Callender, MD
Surgical Oncology Physician · Waterbury, CT
Glenda Grace Callender, MD is a surgical oncology physician with a practice address in Waterbury, Connecticut, and NPI 1952599441, issued on Oct 9, 2007. Check the license (Connecticut 51630, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Glenda Grace Callender
- Credential
- MD
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License number
- 51630 CT
Self-reported in NPPES; status is on the state search - Practice location
- 133 Scovill St Ste 303, Waterbury, CT 06706
- Phone
- (203) 709-6871
- Enumerated
- Oct 9, 2007
- Record last updated
- Sep 18, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130524000143); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2000
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 38 in Connecticut → Look up another NPI →
Also registered at 133 Scovill St Ste 303
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Iyare Esemuede, MDSurgery Physician1487885190
- Kaitlin NgoSurgical Physician Assistant1962079152
Verify Glenda Grace Callender in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 51630Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average surgical oncology physician in 2024
30 Medicare Part D claims for 21 beneficiaries, against an average of 87 among the 1,237 providers of this specialty who prescribed in Part D.
Most prescribed
- Calcitriol11 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
- Hartford Healthcare Medical Group Specialists PLLCBridgeport, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Glenda Grace Callender among 38 surgical oncology physician records in Connecticut
Glenda Grace Callender, MD is one of 38 surgical oncology physician records with a practice address in Connecticut. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 32% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2000 · median 2002 among the 27 with a school on file
- Record last updated2019 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in Connecticut
There are 38 surgical oncology physician records in Connecticut.
All 38 in Connecticut → Every provider in Waterbury → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- David Pearlstone, M.D.Easton, CT 066121962491878
- Charles Cha, M.D.Bridgeport, CT 066061871524355
- Stuart Marcus, M.D.Bridgeport, CT 066061780678227
- Jill RubinsteinBridgeport, CT 066061477810992
- Daniel Kleiner, MDDanbury, CT 068101033324496
- Daniel Labow, MDDanbury, CT 068101346216157
- Ramanathan Madras Seshadri, M.D.Danbury, CT 068101891969937
- Barbara Ward, MDGreenwich, CT 068301356378426
Common questions
What is Glenda Grace Callender, MD's NPI number?
Glenda Grace Callender, MD's National Provider Identifier (NPI) is 1952599441, issued on Oct 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Glenda Grace Callender, MD located?
The NPPES record lists a practice address at 133 Scovill St Ste 303, Waterbury, CT, 06706. Phone: (203) 709-6871. Providers update this record themselves, so call before visiting.
How can I verify Glenda Grace Callender, MD's license?
NPPES lists Connecticut license number 51630, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Glenda Grace Callender, MD prescribe under Medicare Part D?
In 2024, Glenda Grace Callender, MD had 30 Medicare Part D claims for 21 beneficiaries; the average among surgical oncology physician prescribers was 87. 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.