Karen Peterson, NP
NPI 1003877911 · Nurse Practitioner · Leominster, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Peterson, NP is a Nurse Practitioner provider in Leominster, MA (NPI 1003877911).
Provider details
- NPI number
- 1003877911
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 205602 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
181 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 High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 86 | $156 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 48 | $92 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 18 | $108 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians andG0180 | 16 | $46 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 13 | $110 |
Typical Medicare-allowed amounts for these services range $46–$156 (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 · 49 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 169 | 57 |
| Furosemide | 90 | 33 |
| Gabapentin | 87 | 42 |
| Omeprazole | 85 | 27 |
| Amlodipine Besylate | 72 | 32 |
| Lisinopril | 71 | 28 |
| Metoprolol Succinate | 67 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-30
- Last updated
- 2016-01-20
Frequently asked questions
- What is Karen Peterson's NPI number?
- Karen Peterson's National Provider Identifier (NPI) is 1003877911, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Peterson's specialty?
- Karen Peterson is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Peterson located?
- Karen Peterson's practice location on file with NPPES is 48 Nelson Street, Leominster, MA 01453.
- What is Karen Peterson's phone number?
- The practice phone number listed in the NPPES registry for Karen Peterson is (978) 466-4396.
- Does Karen Peterson accept Medicare?
- Karen Peterson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Peterson's NPI active?
- Yes — Karen Peterson's NPI (1003877911) is active in the NPPES registry as of the last update on 2016-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.