Mary Valenton, APRN
NPI 1821640020 · Family Nurse Practitioner · Greenwich, CT
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Valenton, APRN is a Family Nurse Practitioner provider in Greenwich, CT (NPI 1821640020).
Provider details
- NPI number
- 1821640020
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- No
- License
- 91628 (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 tenure25% of score
6 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
322 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 186 | $81 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 119 | $13 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 17 | $50 |
Typical Medicare-allowed amounts for these services range $13–$81 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 302 | 97 |
| Metoprolol Succinate | 168 | 76 |
| Amlodipine Besylate | 128 | 62 |
| Losartan Potassium | 118 | 56 |
| Rosuvastatin Calcium | 106 | 50 |
| Atorvastatin Calcium | 96 | 45 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$64 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)
- 500 W Putnam AveGreenwich, CT 06830Phone: (203) 863-3000
Registry dates
- Enumerated
- 2019-07-09
- Last updated
- 2019-10-03
Frequently asked questions
- What is Mary Valenton's NPI number?
- Mary Valenton's National Provider Identifier (NPI) is 1821640020, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Valenton's specialty?
- Mary Valenton is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Valenton located?
- Mary Valenton's practice location on file with NPPES is 500 W Putnam Ave, Greenwich, CT 06830.
- What is Mary Valenton's phone number?
- The practice phone number listed in the NPPES registry for Mary Valenton is (203) 863-3000.
- Does Mary Valenton accept Medicare?
- Mary Valenton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Valenton's NPI active?
- Yes — Mary Valenton's NPI (1821640020) is active in the NPPES registry as of the last update on 2019-10-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.