Elizabeth Loder, MD
NPI 1881684157 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Loder, MD is a Internal Medicine Physician provider in Boston, MA (NPI 1881684157).
Provider details
- NPI number
- 1881684157
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- License
- 58787 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
44 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 24 | $98 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 20 | $138 |
Typical Medicare-allowed amounts for these services range $98–$138 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Rimegepant Sulfatebrand: Nurtec Odt | 41 |
| Rizatriptan Benzoatebrand: Rizatriptan | 36 |
| Gabapentin | 28 |
| Sumatriptan Succinate | 25 |
| Topiramate | 20 |
| Butalb/Acetaminophen/Caffeinebrand: Butalbital-Acetaminophen-Caffe | 16 |
| Verapamil Hclbrand: Verapamil Er | 15 |
| Zolmitriptan | 15 |
| Tizanidine Hcl | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Elizabeth Loder's NPI number?
- Elizabeth Loder's National Provider Identifier (NPI) is 1881684157, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Loder's specialty?
- Elizabeth Loder is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Loder located?
- Elizabeth Loder's practice location on file with NPPES is 125 Nashua St, Boston, MA 02114-1101.
- What is Elizabeth Loder's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Loder is (615) 573-2493.
- Does Elizabeth Loder accept Medicare?
- Elizabeth Loder is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Loder's NPI active?
- Yes — Elizabeth Loder's NPI (1881684157) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.