Karen Duguay, FNP-BC
NPI 1114535267 · Family Nurse Practitioner · Boston, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Duguay, FNP-BC is a Family Nurse Practitioner provider in Boston, MA (NPI 1114535267).
Provider details
- NPI number
- 1114535267
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- RN2266759 (MA)
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 tenure28% of score
5 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
231 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) |
|---|---|---|
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 109 | $107 |
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 51 | $65 |
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 32 | $156 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 21 | $70 |
| Transitional Care Management Services for Problem of High Complexity99496 | 18 | $239 |
Typical Medicare-allowed amounts for these services range $65–$239 (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 · 56 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 197 | 21 |
| Sertraline Hcl | 145 | — |
| Apixabanbrand: Eliquis | 141 | 11 |
| Levothyroxine Sodium | 122 | 14 |
| Lisinopril | 110 | 16 |
| Furosemide | 81 | 20 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-07-15
- Last updated
- 2024-06-14
- Certified
- 2024-04-30
Frequently asked questions
- What is Karen Duguay's NPI number?
- Karen Duguay's National Provider Identifier (NPI) is 1114535267, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Duguay's specialty?
- Karen Duguay is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Duguay located?
- Karen Duguay's practice location on file with NPPES is 801 Massachusetts Avenue, Boston, MA 02118.
- What is Karen Duguay's phone number?
- The practice phone number listed in the NPPES registry for Karen Duguay is (617) 414-7399.
- Does Karen Duguay accept Medicare?
- Karen Duguay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Duguay's NPI active?
- Yes — Karen Duguay's NPI (1114535267) is active in the NPPES registry as of the last update on 2024-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.