Heather Demassa, APRN, RN, IBCLC
NPI 1609388560 · Family Nurse Practitioner · Darien, CT
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Heather Demassa, APRN, RN, IBCLC is a Family Nurse Practitioner provider in Darien, CT (NPI 1609388560).
Provider details
- NPI number
- 1609388560
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN, RN, IBCLC
- Sex
- Female
- Sole proprietor
- No
- License
- 7134 (CT)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
8 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metronidazole | 15 | 11 |
| Estradiol | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$39 across 2 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
Additional practice locations (1)
- 27 Hospital Ave Suite 303Danbury, CT 06810-2110Phone: (203) 798-0500Fax: (203) 798-0081
Registry dates
- Enumerated
- 2017-11-01
- Last updated
- 2024-06-12
- Certified
- 2024-06-12
Frequently asked questions
- What is Heather Demassa's NPI number?
- Heather Demassa's National Provider Identifier (NPI) is 1609388560, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Heather Demassa's specialty?
- Heather Demassa is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Heather Demassa located?
- Heather Demassa's practice location on file with NPPES is 36 Grove Street, Darien, CT 06840-5329.
- What is Heather Demassa's phone number?
- The practice phone number listed in the NPPES registry for Heather Demassa is (203) 276-4282.
- Does Heather Demassa accept Medicare?
- Heather Demassa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Heather Demassa's NPI active?
- Yes — Heather Demassa's NPI (1609388560) is active in the NPPES registry as of the last update on 2024-06-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.