DR. STEVEN CHARLES BALSER M.D.
NPI 1750468393
Emergency Medicine - Emergency Medical Services in Ayer, MA
About Dr. Steven Charles Balser M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEVEN CHARLES BALSER M.D. (NPI 1750468393) is an individual emergency medical services provider in Ayer, Massachusetts, licensed in Massachusetts (72046) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with Mount Auburn Hospital, and is a graduate of Other (1988).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
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
Dr. Steven Charles Balser 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
5Medicare enrollment records show Steven Balser reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ayer, MA 01432
- Reassigned Medicare billing, Massachusetts enrollment
- 290 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 253 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,477 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1316987993 (Massachusetts)
- 2,579 clinicians in this Medicare group
Milton, MA 02186
- Reassigned Medicare billing, Massachusetts enrollment
- 177 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 8
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mount Auburn Hospital
Acute Care Hospitals · Cambridge, MABeth Israel Deaconess Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01432 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.
AYER, MA 01432
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 Steven Balser's NPI number?
The NPI number for Steven Balser is 1750468393. It was assigned to this individual provider in the NPPES registry on November 1, 2006.
Where is Steven Balser located?
Steven Balser practices at 200 Groton Rd, Ayer, MA 01432. The listed phone number is (978) 784-9000.
What is Steven Balser's specialty?
The primary specialty registered for this NPI is Emergency Medicine, specializing in Emergency Medical Services, with taxonomy code 207PE0004X.
Is Steven Balser enrolled in Medicare?
Yes. Steven Balser 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 Steven Balser's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Balser reassigns Medicare benefits to 5 organizations: Steward Emergency Physicians, Inc (Ayer, MA), Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA), Beth Israel Deaconess Medical Center, Inc. (Boston, MA), Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA) and Bid-Milton Physician Associates Inc (Milton, MA). 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 Steven Balser's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Steven Balser accept?
Health plans from Taro Health list Steven Balser as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Steven Balser affiliated with any hospitals?
According to CMS data, Steven Balser is affiliated with Mount Auburn Hospital and Beth Israel Deaconess Medical Center.
When was this NPI record last updated?
The NPPES record for Steven Balser was last updated on April 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Dr. Steven Charles Balser, M.D. · NPI 1750468393
Emergency Medical Services physician in Ayer, Massachusetts. Individual provider, active in the CMS NPPES registry since November 1, 2006.
## Identity
- **NPI:** 1750468393 (Entity type: Individual)
- **Enumerated:** November 1, 2006
- **Primary specialty:** Emergency Medicine - Emergency Medical Services · taxonomy 207PE0004X
- **State license:** 72046 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 200 GROTON RD, Ayer, MA 01432-1168
- **Phone:** (978) 784-9000
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Steward Emergency Physicians, Inc (NPI 1780971275, Ayer, MA); Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (NPI 1952358533, Boston, MA); Beth Israel Deaconess Medical Center, Inc. (NPI 1548202641, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1194765438, Boston, MA); Bid-Milton Physician Associates Inc (NPI 1184312738, Milton, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1988
## Record status
- **NPPES last updated:** April 22, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1750468393) · Data from the CMS NPPES public registry.