Olga Mclellan
NPI 1942834858 · Nurse Practitioner · Charlestown, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Olga Mclellan is a Nurse Practitioner provider in Charlestown, MA (NPI 1942834858).
Provider details
- NPI number
- 1942834858
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 236422 (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
6 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
127 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) |
|---|---|---|
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 74 | $118 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 30 | $15 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 23 | $9 |
Typical Medicare-allowed amounts for these services range $9–$118 (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 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 55 | 25 |
| Atorvastatin Calcium | 41 | 24 |
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 29 | — |
| Omeprazole | 29 | 15 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 29 | — |
| Ibuprofen | 26 | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-02-29
- Last updated
- 2023-05-13
- Certified
- 2023-05-13
Frequently asked questions
- What is Olga Mclellan's NPI number?
- Olga Mclellan's National Provider Identifier (NPI) is 1942834858, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Olga Mclellan's specialty?
- Olga Mclellan is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Olga Mclellan located?
- Olga Mclellan's practice location on file with NPPES is 15 Tufts St, Charlestown, MA 02129-2711.
- What is Olga Mclellan's phone number?
- The practice phone number listed in the NPPES registry for Olga Mclellan is (857) 238-1100.
- Does Olga Mclellan accept Medicare?
- Olga Mclellan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Olga Mclellan's NPI active?
- Yes — Olga Mclellan's NPI (1942834858) is active in the NPPES registry as of the last update on 2023-05-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.