Iwona Lacka, M.D
Geriatric Medicine (Internal Medicine) Physician · Norwalk, CT
Iwona Lacka, M.D is a geriatric medicine (internal medicine) physician with a practice address in Norwalk, Connecticut, and NPI 1477868958, issued on Aug 9, 2010. Check the license (Connecticut 025631, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Iwona Lacka
- Credential
- M.D
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License numbers
- 025631 CT
052631 CT
Self-reported in NPPES; status is on the state search - Practice location
- 34 Maple St, Norwalk, CT 06850
- Phone
- (203) 852-2025
- Enumerated
- Aug 9, 2010
- Record last updated
- Jul 22, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140612001954); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 104 in Connecticut → Look up another NPI →
Also registered at 34 Maple St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Muhammad Aamir, MDStudent in an Organized Health Care Education/Training Program1184411332
- Alexander Abadir, MDGastroenterology Physician1811429699
- Erica Acevedo, PA-CPhysician Assistant1093289936
- Bradley Acott, M.D.Student in an Organized Health Care Education/Training Program1689360836
- Laura Aguilar FrancoStudent in an Organized Health Care Education/Training Program1053248237
- Wasin Ahuja, M.D.Hospitalist Physician1932584588
Verify Iwona Lacka in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 025631Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
3,318 Medicare Part D claims for 283 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 123 claims were for opioids.
Most prescribed
- Levothyroxine Sodium157 claims
- Eliquis140 claims
- Trazodone Hcl114 claims
- Atorvastatin Calcium102 claims
- Escitalopram Oxalate101 claims
- Amlodipine Besylate100 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.
The MIPS final score for 2023 (Medicare payment program): 93.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Northeast Medical Group IncStratford, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Iwona Lacka among 104 geriatric medicine (internal medicine) physician records in Connecticut
Iwona Lacka, M.D is one of 104 geriatric medicine (internal medicine) physician records with a practice address in Connecticut. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 72% of them.
- NPI issued2010 · 72% of these records are older, 25% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2007 · median 1998 among the 68 with a school on file
- Record last updated2014 · 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 207RG0300X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in Connecticut
There are 104 geriatric medicine (internal medicine) physician records in Connecticut.
All 104 in Connecticut → Every provider in Norwalk → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Joseph Herbin, MDFairfield, CT 068251417910928
- Edward Berman, M.D.Ridgefield, CT 068771326082538
- Barney Spivack, MDWestport, CT 068801326116948
- Derrick Lam, MDDanbury, CT 068101740841899
- Thomas Ashley, MDStamford, CT 069021932624236
- Tzivia Moreen, MDStamford, CT 069051447417795
- Joseph Demayo, M.D.Middlebury, CT 067621720211444
- Shoshana Streiter, M.D.Waterbury, CT 067081346685252
Common questions
What is Iwona Lacka, M.D's NPI number?
Iwona Lacka, M.D's National Provider Identifier (NPI) is 1477868958, issued on Aug 9, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Iwona Lacka, M.D located?
The NPPES record lists a practice address at 34 Maple St, Norwalk, CT, 06850. Phone: (203) 852-2025. Providers update this record themselves, so call before visiting.
How can I verify Iwona Lacka, M.D's license?
NPPES lists Connecticut license number 025631, 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 Iwona Lacka, M.D prescribe under Medicare Part D?
In 2024, Iwona Lacka, M.D had 3,318 Medicare Part D claims for 283 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. Part D covers Medicare prescriptions only.
What is Iwona Lacka, M.D's MIPS final score?
The 2023 MIPS final score is 93.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.