Gretchen O'Brien, N.P.
NPI 1013220961 · Nurse Practitioner · Needham, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gretchen O'Brien, N.P. is a Nurse Practitioner provider in Needham, MA (NPI 1013220961).
Provider details
- NPI number
- 1013220961
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- N.P.
- Sex
- Female
- Sole proprietor
- No
- License
- RN232134 (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 tenure25% of score
15 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
567 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) |
|---|---|---|
| Programming of Dual Lead Pacemaker System93280 | 227 | $32 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 130 | $87 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 113 | $59 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 28 | $129 |
| Programming of Multiple Lead Implantable Defibrillator System93284 | 20 | $53 |
| Programming of Single Lead Implantable Defibrillator System93282 | 18 |
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 |
|---|---|---|
| Metoprolol Succinate | 41 | 20 |
| Apixabanbrand: Eliquis | 23 | 13 |
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.
$283 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)
- 185 Pilgrim RdBaker 4Boston, MA 02215-5324Phone: (617) 667-8800
Registry dates
- Enumerated
- 2010-07-21
- Last updated
- 2021-02-01
- Certified
- 2021-02-01
Frequently asked questions
- What is Gretchen O'Brien's NPI number?
- Gretchen O'Brien's National Provider Identifier (NPI) is 1013220961, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretchen O'Brien's specialty?
- Gretchen O'Brien is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gretchen O'Brien located?
- Gretchen O'Brien's practice location on file with NPPES is 148 Chestnut St, Needham, MA 02492-2505.
- What is Gretchen O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Gretchen O'Brien is (781) 453-7750.
- Does Gretchen O'Brien accept Medicare?
- Gretchen O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gretchen O'Brien's NPI active?
- Yes — Gretchen O'Brien's NPI (1013220961) is active in the NPPES registry as of the last update on 2021-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.