Debra Adler-Klein, MD
Internal Medicine Physician · Danbury, CT
Debra Adler-Klein, MD is an internal medicine physician with a practice address in Danbury, Connecticut, and NPI 1245278886, issued on Jun 4, 2006. Check the license (Connecticut 029017, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Debra Adler-Klein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 029017 CT
Self-reported in NPPES; status is on the state search - Practice location
- 79 Sand Pit RD, Danbury, CT 06810
- Phone
- (203) 749-5700
- Enumerated
- Jun 4, 2006
- Record last updated
- Feb 21, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (203) 383-0808
- Medicaid ID
- 004002705 CT
- Medicare enrollment
- Enrolled (PECOS I20171002001641); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 79 Sand Pit RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joann Ahern, APRNMedical-Surgical Clinical Nurse Specialist1770566317
- Bailey Gartman, LCSW, AADCClinical Social Worker1083344683
- Iris Gilligan, LCSWClinical Social Worker1700247889
- Buddhini Gurusinghe, M.D.Internal Medicine Physician1992019723
- Stacey Lombardo, DNP, APRN, NP-CAdult Health Nurse Practitioner1891245916
- Guarina Molina, MDInternal Medicine Physician1700465341
Verify Debra Adler-Klein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 029017Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average internal medicine physician in 2024
760 Medicare Part D claims for 87 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Atorvastatin Calcium53 claims
- Amlodipine Besylate51 claims
- Lisinopril46 claims
- Albuterol Sulfate Hfa35 claims
- Metformin Hcl30 claims
- Rosuvastatin Calcium29 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
- Optimus Health Care IncBridgeport, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Debra Adler-Klein among 2,623 internal medicine physician records in Connecticut
Debra Adler-Klein, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 52% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1984 · median 2004 among the 1,646 with a school on file
- Record last updated2014 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
112 internal medicine physician records list a practice address in Danbury
They are 112 of the 2,412 NPPES records with a practice address in Danbury, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Danbury → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Alka Aggarwal, MDDanbury, CT 068101427041987
- Charles Cahn, M.D.Danbury, CT 068101720064504
- Karen Coblens, MDDanbury, CT 068101063479848
- Allen Davis, M.D.Danbury, CT 068101639163439
- Amin Elashker, DODanbury, CT 068101093794182
- Sateesh Kathiravelu, M.D.Danbury, CT 068101083665244
- Asha Marhatta, MD; MPHDanbury, CT 068101366490013
- Kathleen Mauks, M.D.Danbury, CT 068101629064035
Common questions
What is Debra Adler-Klein, MD's NPI number?
Debra Adler-Klein, MD's National Provider Identifier (NPI) is 1245278886, issued on Jun 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Debra Adler-Klein, MD located?
The NPPES record lists a practice address at 79 Sand Pit RD, Danbury, CT, 06810. Phone: (203) 749-5700. Providers update this record themselves, so call before visiting.
How can I verify Debra Adler-Klein, MD's license?
NPPES lists Connecticut license number 029017, 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 Debra Adler-Klein, MD prescribe under Medicare Part D?
In 2024, Debra Adler-Klein, MD had 760 Medicare Part D claims for 87 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.