NPPES file of Aug 9, 2026

Anna C. Freitag, M.D.

Endocrinology, Diabetes & Metabolism Physician · Waterbury, CT

Anna C. Freitag, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Waterbury, Connecticut, and NPI 1235113507, issued on Dec 1, 2005. Check the license (Connecticut 037590, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1235113507
Name
Anna C. Freitag
Credential
M.D.
Primary taxonomy
Endocrinology, Diabetes & Metabolism Physician 207RE0101X
License number
037590 CT
Self-reported in NPPES; status is on the state search
Practice location
56 Franklin St, Waterbury, CT 06706
Phone
(203) 709-6000
Enumerated
Dec 1, 2005
Record last updated
Nov 9, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20051221000921); accepts Medicare assignment
Medical or professional school
University Of Connecticut School Of Medicine, 1994
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest endocrinology, diabetes & metabolism physician records → All 214 in Connecticut → Look up another NPI →

Also registered at 56 Franklin St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Celin Abraham, PA-CPhysician Assistant1407171085
  2. Diego Accorsi, MDStudent in an Organized Health Care Education/Training Program1700307535
  3. Ireneo Adao, RRTRegistered Respiratory Therapist1609063973
  4. Caterina Aiello, DOSurgery Physician1922669522
  5. Michael Ajemian, MDSurgery Physician1699702357
  6. Abeera Akram, MDCardiovascular Disease Physician1497240238

Verify Anna C. Freitag in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersConnecticut Medical Examining Board
    Search for license 037590    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Connecticut license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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3.3 times the Medicare Part D claims of the average endocrinology, diabetes & metabolism physician in 2024

8,589 Medicare Part D claims for 599 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.

  1. Anna Freitag8,589
  2. Specialty average2,630

Most prescribed

  1. Levothyroxine Sodium557 claims
  2. Mounjaro557 claims
  3. Rosuvastatin Calcium502 claims
  4. Ozempic352 claims
  5. Tresiba Flextouch U-200278 claims
  6. Glimepiride257 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.

Industry payments in 2024: $1,509.57

87 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Anna Freitag$1,509.57
  2. Specialty average$5,742.15

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Trinity Health OF New England Provider Network Organization IncWaterbury, CT

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Anna C. Freitag among 214 endocrinology, diabetes & metabolism physician records in Connecticut

Anna C. Freitag, M.D. is one of 214 endocrinology, diabetes & metabolism physician records with a practice address in Connecticut. 83% 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, 87% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileYes · 68% of these records are
  • Graduated1994 · median 2004 among the 145 with a school on file
  • Record last updated2021 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Endocrinology, Diabetes & Metabolism Physician providers in Connecticut

There are 214 endocrinology, diabetes & metabolism physician records in Connecticut.

All 214 in Connecticut → Every provider in Waterbury → Endocrinology, Diabetes & Metabolism Physician nationwide →

The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes

  1. Juan Fica, M.D.Waterbury, CT 067081023085065
  2. Robert LabeckProspect, CT 067121720949738
  3. Shayan Riahi, DOProspect, CT 067121467012278
  4. Beatriz Olson, MDMiddlebury, CT 067621871543009
  5. Egils Bogdanovics, M.D.Torrington, CT 067901619065976
  6. Bruce Wainer, MDStratford, CT 066141962506204
  7. Danielle Benaviv-Meskin, MDTrumbull, CT 066111730106519
  8. Judith Castillo, MDTrumbull, CT 066111205034600

Common questions

What is Anna C. Freitag, M.D.'s NPI number?

Anna C. Freitag, M.D.'s National Provider Identifier (NPI) is 1235113507, issued on Dec 1, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Anna C. Freitag, M.D. located?

The NPPES record lists a practice address at 56 Franklin St, Waterbury, CT, 06706. Phone: (203) 709-6000. Providers update this record themselves, so call before visiting.

How can I verify Anna C. Freitag, M.D.'s license?

NPPES lists Connecticut license number 037590, 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 Anna C. Freitag, M.D. prescribe under Medicare Part D?

In 2024, Anna C. Freitag, M.D. had 8,589 Medicare Part D claims for 599 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.