Anna Freitag, M.D.
NPI 1235113507 · Endocrinology, Diabetes & Metabolism Physician · Waterbury, CT
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Anna Freitag, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Waterbury, CT (NPI 1235113507).
Provider details
- NPI number
- 1235113507
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 037590 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
385 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 205 | $186 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 94 | $134 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 38 | $15 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 24 | $35 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 24 | $230 |
Typical Medicare-allowed amounts for these services range $15–$230 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 118 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 557 | 153 |
| Tirzepatidebrand: Mounjaro | 557 | 118 |
| Rosuvastatin Calcium | 502 | 145 |
| Semaglutidebrand: Ozempic | 352 | 95 |
| Insulin Degludecbrand: Tresiba Flextouch U-200 | 278 | 75 |
| Glimepiride | 257 | 66 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,510 across 87 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-01
- Last updated
- 2021-11-09
- Certified
- 2021-11-09
Frequently asked questions
- What is Anna Freitag's NPI number?
- Anna Freitag's National Provider Identifier (NPI) is 1235113507, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Anna Freitag's specialty?
- Anna Freitag is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Anna Freitag located?
- Anna Freitag's practice location on file with NPPES is 56 Franklin St, Waterbury, CT 06706-1253.
- What is Anna Freitag's phone number?
- The practice phone number listed in the NPPES registry for Anna Freitag is (203) 709-6000.
- Does Anna Freitag accept Medicare?
- Anna Freitag is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Anna Freitag's NPI active?
- Yes — Anna Freitag's NPI (1235113507) is active in the NPPES registry as of the last update on 2021-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.