Heather Frimmer, MD
NPI 1003897687 · Diagnostic Radiology Physician · Norwalk, CT
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Heather Frimmer, MD is a Diagnostic Radiology Physician provider in Norwalk, CT (NPI 1003897687).
Provider details
- NPI number
- 1003897687
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 043027 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,392 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Screening Mammography77067 | 480 | $71 |
| Screening 3d Breast Mammography77063 | 473 | $34 |
| Screening 3d Breast Mammography77063 | 322 | $30 |
| Screening Mammography77067 | 322 | $38 |
| Complete Ultrasound Scan of 1 Breast76641 | 255 | $89 |
| Complete Ultrasound Scan of 1 Breast76641 | 119 | $53 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-09
- Last updated
- 2024-01-17
- Certified
- 2024-01-17
Frequently asked questions
- What is Heather Frimmer's NPI number?
- Heather Frimmer's National Provider Identifier (NPI) is 1003897687, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Heather Frimmer's specialty?
- Heather Frimmer is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Heather Frimmer located?
- Heather Frimmer's practice location on file with NPPES is 148 East Ave, Norwalk, CT 06851-5721.
- What is Heather Frimmer's phone number?
- The practice phone number listed in the NPPES registry for Heather Frimmer is (203) 852-9913.
- Does Heather Frimmer accept Medicare?
- Heather Frimmer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Heather Frimmer's NPI active?
- Yes — Heather Frimmer's NPI (1003897687) is active in the NPPES registry as of the last update on 2024-01-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.