Erin Lager, M.D.
NPI 1861849192 · Pediatrics Physician · Chelmsford, MA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erin Lager, M.D. is a Pediatrics Physician provider in Chelmsford, MA (NPI 1861849192).
Provider details
- NPI number
- 1861849192
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- LP03591 (RI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-05-17
- Last updated
- 2019-06-21
Frequently asked questions
- What is Erin Lager's NPI number?
- Erin Lager's National Provider Identifier (NPI) is 1861849192, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erin Lager's specialty?
- Erin Lager is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Erin Lager located?
- Erin Lager's practice location on file with NPPES is 228 Billerica Rd, Chelmsford, MA 01824-3604.
- What is Erin Lager's phone number?
- The practice phone number listed in the NPPES registry for Erin Lager is (978) 250-6000.
- Does Erin Lager accept Medicare?
- Erin Lager is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erin Lager's NPI active?
- Yes — Erin Lager's NPI (1861849192) is active in the NPPES registry as of the last update on 2019-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.