ANNETTE ILG M.D.
NPI 1629427919
Emergency Medicine in Boston, MA
About Annette Ilg M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANNETTE ILG M.D. (NPI 1629427919) is an individual emergency medicine provider in Boston, Massachusetts, licensed in Massachusetts (267188) and active in the NPI registry since June 2016. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Annette Ilg M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
6Medicare enrollment records show Annette Ilg reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1952358533 (Massachusetts)
- 1,006 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 247 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Cleveland, OH 44195
- Reassigned Medicare billing, Ohio enrollment
- 7,608 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 6
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MACleveland Clinic
Acute Care Hospitals · Cleveland, OHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02215 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02215
BOSTON, MA 02215
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Annette Ilg's NPI number?
The NPI number for Annette Ilg is 1629427919. It was assigned to this individual provider in the NPPES registry on June 7, 2016.
Where is Annette Ilg located?
Annette Ilg practices at 1 Deaconess Rd Rosenberg 2, Boston, MA 02215. The listed phone number is (440) 670-4200.
What is Annette Ilg's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Annette Ilg enrolled in Medicare?
Yes. Annette Ilg is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Annette Ilg's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Annette Ilg reassigns Medicare benefits to 6 organizations: Brigham & Womens Physicians Organization Inc (Boston, MA), Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA), Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Annette Ilg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Annette Ilg affiliated with any hospitals?
According to CMS data, Annette Ilg is affiliated with Massachusetts General Hospital, Brigham And Women's Hospital and Cleveland Clinic.
When was this NPI record last updated?
The NPPES record for Annette Ilg was last updated on July 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Annette Ilg, M.D. · NPI 1629427919
Emergency Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 7, 2016.
## Identity
- **NPI:** 1629427919 (Entity type: Individual)
- **Enumerated:** June 7, 2016
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 267188 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 DEACONESS RD, ROSENBERG 2, Boston, MA 02215-5321
- **Phone:** (440) 670-4200
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA); Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (NPI 1861216038, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1316987993, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** July 20, 2026
- **Other identifiers:** Other 267188 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1629427919) · Data from the CMS NPPES public registry.